⚡ deftools.io

Edit and validate .env files — detect duplicate keys, empty values, and unsafe characters

Parse code in 10+ languages and explore the syntax tree. Select nodes, see their properties.

Interactive JSON tree explorer for inspecting large payloads — collapse branches, search nodes, copy JSONPath. A focused tree-first inspection tool, distinct from a full JSON formatter/validator.

Visualize terraform plan JSON output — resource change tree with create/update/destroy/replace badges and attribute diff

Inspect Docker images from a docker save tar — layers, sizes, files per layer, and wasted space analysis.

Convert a docker run command to a docker-compose.yml file. Paste any docker run flags and get the equivalent compose service.

Upload CSV files and query them with SQL. Run aggregations, JOINs, window functions — all in your browser.

Live Markdown preview with GitHub-style rendering. Type on the left, see the result on the right.

Convert Markdown to clean HTML. GitHub Flavored Markdown with tables, task lists, and code highlighting.

View HTTP Archive (HAR) files: waterfall chart, request details, headers, timings, and filters.

Convert text to data URI for inline embedding in HTML, CSS, and JavaScript

View .eml email files online — headers, HTML/text body, and attachments. No upload needed.

Convert data sizes between bytes, KB, KiB, MB, MiB, GB, GiB, TB, bits and more. Decimal (SI) and binary (IEC) units, plus a download-time estimator.

Decode Protocol Buffers binary data (hex or base64) to JSON without a .proto file

Interactive EXPLAIN plan visualizer for PostgreSQL, MySQL, and SQLite — tree view, cost hotspots, and node analysis

Test XPath expressions against XML and see matching nodes highlighted with counts and previews

View text or binary as a hexdump (xxd format). Shows offset, hex bytes, and ASCII side panel side by side.

Encode text to Base64 or decode Base64 back to text. Unicode-safe, URL-safe mode, file support.

Generate and decode HTTP Basic Authentication headers — convert username:password to and from the Authorization: Basic header.

Encode text to Base32 or decode Base32 back to text. Supports RFC 4648 standard and extended hex alphabets.

Count tokens for GPT-4o, GPT-4, Claude, Gemini, Llama and Mistral

Generate NanoID, ULID, CUID2, KSUID, and UUID v4/v7 identifiers. Decode Snowflake IDs from Twitter/X and Discord back to timestamps and metadata. The go-to tool when you need IDs beyond plain UUIDs.

Subset TTF, OTF, or WOFF2 fonts — keep only the character ranges you need and reduce font file size by up to 90%

Convert .env files to JSON, YAML, Docker Compose, shell export, or systemd — and convert JSON back to .env.

Create beautiful code screenshots with syntax highlighting, themes, window chrome, and export to PNG

Convert CSV data into SQL INSERT statements. Pick a table name, choose MySQL, PostgreSQL, SQLite or SQL Server quoting, and export seed scripts.

Run SQL queries on CSV, Parquet, and JSON files with JOINs between datasets

Open SQLite database files in your browser: browse tables, preview data, and run SQL queries.

Brotli compress and decompress text online — up to 26% smaller than gzip, served by CDNs with quality 0–11 control and Base64 output

Compare Brotli, Gzip, and Deflate compression side-by-side — see sizes, ratios, and speeds for your data in one view

Gzip compress and decompress text online — the universal HTTP Content-Encoding format for .gz files, API payloads, and web server compression

Generate robots.txt rules to block AI crawlers like GPTBot, ClaudeBot and CCBot from scraping your site.

Compare AI model pricing, context windows, and capabilities side-by-side — with a cost calculator for input and output tokens

Build and format AI prompts with variables, templates, and API-specific output for OpenAI, Anthropic, and Google Gemini

Generate an llms.txt file for your website to guide AI assistants and LLMs. Form-based builder with live markdown preview.

Generate MCP server configuration JSON for Claude Desktop, Claude Code, and other MCP clients. Form-based builder with validation.

View Apache Parquet files in your browser: schema, column statistics, and data preview.

Visualize JSON data as an interactive node graph with zoom, drag, and collapsible branches

Decode .torrent files — view file list with sizes, trackers, infohash, and creation date.

Build shields.io badges for your README — pick a style, label, message, and colors to get instant markdown or HTML.

Searchable ASCII table with decimal, hex, octal, binary, and HTML entity codes for all 128 characters.

Bitwise AND, OR, XOR, NOT, shifts on 32-bit integers. Visual bit grid, click to toggle bits, results in decimal, hex, binary and octal.

Compute Unix file permissions: toggle read/write/execute for user, group, others. Get numeric, symbolic, and full chmod commands.

Encode & decode classic ciphers: Caesar, ROT13, Atbash, Vigenère, A1Z26, Morse, Binary, Hex, Rail Fence, Bacon. Live preview, deep-link, copy, history.

Analyze cyclomatic and cognitive complexity of JavaScript and TypeScript code. Per-function metrics with maintainability index.

Build clean Conventional Commits messages with live preview, scope, breaking-change flags, footers, and gitmoji. Copy-ready output, deep-link share, and recent history.

Parse Set-Cookie or Cookie headers into name, value, attributes and warnings, or build a Set-Cookie header from a form.

Parse any cron expression into a human-readable schedule and preview upcoming run times.

Minify and beautify CSS instantly. Strip comments, whitespace, and redundant semicolons — or pretty-print minified CSS back to readable format.

Test CSS selectors against HTML and see matched elements with counts, tags, and snippets. Supports :nth-child, attribute selectors, combinators, and pseudo-classes.

Compare two CSS selectors side by side — see ID, class, and element scores with visual bars, and learn which rule wins when both apply.

Convert curl commands to Python, JavaScript, Go, and Rust code.

Compare two pieces of text line by line with word-level highlighting

Lint your email HTML against Can I Email data — catch Outlook, Gmail, and Apple Mail rendering issues before you send.

Validate email addresses, detect typos, disposable and role-based addresses, and normalize Gmail plus-addressing and dots.

Inspect IEEE 754 floating-point numbers: sign, exponent, mantissa bits, exact decimal value, next/previous float. Single (32-bit) and double (64-bit) precision.

Validate GitHub Actions workflow YAML — syntax, required fields, deprecated actions, job dependencies, and context expressions

Test glob patterns against a list of file paths. Supports *, **, ?, brace expansion, and negation (!).

Query any GraphQL API — write a query, add variables and headers, send the request, and view the JSON response with export to cURL or fetch

Format and beautify GraphQL queries, mutations, fragments, and schemas with proper indentation and line breaks.

Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes from text or files. Hex, Base64, or Base64URL output. Verify a hash against input.

Encode and decode HTML entities. Convert special characters to named, decimal, or hex references and back.

Beautify and indent HTML for readability — turn messy or minified markup into clean, properly nested code with 2-space or 4-space indentation.

Live HTML/CSS/JS sandbox. Write code in three panes, see instant preview in a sandboxed iframe, capture console output, share via deep-link.

Build HTML tables visually. Add rows and columns, set headers, and copy the markup.

Convert HTML to React JSX. Transforms class to className, inline styles to objects, event handlers, comments, and self-closing tags.

Convert HTML to clean Markdown. Paste any HTML snippet — headings, links, images, lists, tables, code — and get Markdown output instantly.

Quick reference for all HTTP methods. Learn what each method does, when to use it, and see code examples.

Build an HTTP request and convert it to curl, fetch, axios, Python requests, Go, and raw HTTP text

Searchable reference for all HTTP status codes (1xx–5xx). Filter by category, copy responses, see usage examples.

Minify and beautify JavaScript online. Remove comments, whitespace, and dead code — or pretty-print minified JS back to readable form.

Generate Go structs from JSON. Paste JSON, get type definitions with json tags, omitempty, embedded structs, and pointer nullables.

Convert JSON to GraphQL types. Paste a JSON object and get GraphQL schema type definitions with nullable/non-nullable fields.

Generate Pydantic v2 BaseModel classes from JSON with type hints, Optional fields, and snake_case alias support. Paste JSON, get Python model definitions for FastAPI and data validation.

Generate TypeScript interfaces from JSON — optional properties, union types, readonly fields, and nested objects. Paste JSON, get ready-to-use .d.ts definitions.

Generate Zod validation schemas from JSON — z.object(), z.string(), z.number(), z.enum(), z.array() with nullable support. Paste JSON, get runtime type-safe validation code.

Convert JSON to XML and XML to JSON online. Supports attributes, arrays, namespaces, and custom root elements.

Compare two JSON objects semantically. Shows added, removed, changed, and type-changed keys with full dot-path notation. Handles nested objects and arrays.

Flatten nested JSON to dot-notation key-value pairs and unflatten them back

Format, validate, and minify JSON with real-time syntax checking. Beautify messy payloads, compress for production, catch errors before they break your app, and share via deep-link.

Sort JSON object keys alphabetically or in a custom order. Deep recursive sort for stable snapshots before diffing or committing.

Infer a JSON Schema (Draft 2020-12) from any sample JSON. Live, configurable schema generation with format detection.

Decode and inspect JSON Web Tokens — view header, payload, and signature claims. Verify HS256/384/512, RS256, ES256 signatures and check token expiration.

Press any key to inspect its event properties — key, code, keyCode, location, modifiers, and friendly hotkey combo. Live modifier indicators, press history, copy-ready listener snippet, and a reference table of common key codes. Essential for building keyboard shortcuts, games, and accessible UIs.

Paste logs and instantly filter, search, and analyze them with severity detection and statistics

Generate mailto: links with to, cc, bcc, subject and body fields. URL-encoded and ready to use in HTML and email templates.

Searchable database of MIME types and file extensions. Reverse lookup (extension → MIME), forward lookup (MIME → extensions), category filters, common-type cheatsheet, and copy helpers.

Encode text to Morse code, decode Morse back to text, and playback audio. Supports international Morse code standard.

Convert JSON array to NDJSON (JSON Lines) and back. Split JSON arrays into newline-delimited records, or merge JSONL into a single JSON array.

Convert numbers between binary, octal, decimal, and hexadecimal with arbitrary precision. BigInt-powered exact conversion for 256-bit values and UUIDs.

Paste a list of numbers and get instant descriptive statistics: count, sum, mean, median, mode, range, variance, standard deviation, quartiles, IQR, outliers, skewness, kurtosis, and a live histogram.

Answer 3 questions to find the right open-source license for your project — MIT, Apache 2.0, GPL 3.0, or BSD.

Generate a typed TypeScript API client from an OpenAPI/Swagger spec — fetch or axios with interfaces for every endpoint

Compare two OpenAPI specs and see a breaking-changes report: removed endpoints, changed types, new required params, and more.

Visually build a package.json file — choose presets for Node, React, Next.js, and more, configure every field, and get live JSON output

Generate Playwright code snippets for common browser automation tasks. Supports selectors, actions, assertions, and more.

Decode any regex into plain English — paste a pattern and see every token explained: anchors, quantifiers, character classes, groups. Understand what a regex matches without running it.

Test and debug regular expressions against sample text — live match highlighting, capture group inspection, replace mode, common pattern library.

Compile SCSS and Sass to CSS online — live preview with nesting, variables, mixins, and source map support

Parse, validate, and compare semantic versions (semver). Bump major/minor/patch, test range constraints (^ ~ > x-range), diff versions, and inspect pre-release precedence.

Convert titles to clean URL slugs. Unicode-aware, multi-line batch mode, custom separators.

Decode Discord, Twitter/X, and Instagram snowflake IDs to timestamps, worker IDs, and sequence numbers. Also generate ID ranges from timestamps.

Format, beautify, and minify SQL queries. Dialect-aware keyword handling for MySQL, PostgreSQL, SQLite, and Standard SQL.

Compare two sets of CREATE TABLE statements and generate ALTER TABLE migration scripts: added/removed columns, changed types, and new/dropped indexes.

Escape and unescape text for HTML, URL, JSON, Regex, Base64, and C-string. Live preview, bulk mode, one-click copy.

Convert SVG markup to React JSX component. Transforms class to className, kebab-case attributes to camelCase, inline styles to objects.

Convert Unix timestamps to human-readable dates and back. ISO 8601, RFC 2822, Excel serial, local time, relative time.

Visually build a tsconfig.json file — choose presets for Node, React, and Next.js, configure every option with explanations, and get live JSON output

Inspect every character's codepoint, UTF-8/UTF-16 bytes, HTML/JS/CSS/URL escapes, and block. Detects invisible, combining, control, and zero-width characters.

Encode and decode URLs, URI components, and query strings. Supports encodeURIComponent, encodeURI, and base64.

Parse any URL into its components: protocol, host, path, query params, hash. Edit fields and rebuild a URL, or share a parsed URL via deep-link.

Generate UUID v4 and v7 identifiers in bulk — random and time-ordered. Inspect any UUID to extract its embedded creation timestamp and version details. Also generates GUIDs for Microsoft conventions.

Test WebSocket connections, send messages, and view real-time responses. Supports multiple echo servers and custom endpoints.

Format, validate, minify and convert XML. Syntax highlight, XML to JSON, stats, and tree view.

Convert between YAML and JSON formats. Real-time conversion.

Generate RFC 6902 JSON Patch documents by comparing two JSON objects. Useful for API PATCH requests and partial updates.

Evaluate RFC 6901 JSON Pointer expressions against any JSON document. Resolve paths like /store/book/0/title, see matches live, and list every pointer in the tree.

Validate JSON against a schema online — paste your JSON Schema and data, see errors at the exact path with detailed diagnostics and a full compliance report.

Query JSON with JSONPath expressions ($.store.book[*].author, $.users[?(@.age>18)]). Inline engine, no libraries. Live results, path highlighting, sample data, deep-linking.

Generate cron expressions from a schedule: every N minutes, daily at a time, weekly on weekdays, monthly on day N.

Generate Kubernetes Deployment, Service, and Ingress YAML manifests from a form with sensible defaults.

Build common bash one-liners without memorizing the syntax. Pick a task, fill in the blanks, copy the command.

Validate docker-compose.yml and explain services, networks, and volumes. Paste your compose file and get a full report.

Generate a Dockerfile from form inputs — base image, ports, env vars, commands, and best-practice options.

Generate Apache .htaccess config: redirects, HTTPS enforcement, www handling, gzip, caching

Generate .editorconfig files visually. Configure indentation, charset, line endings, and file-type rules, then copy the ready-to-use config.

Find the right git command to undo mistakes: wrong branch commits, accidental pushes, lost branches, bad merges, unstaging, and more.

Generate nginx server block config: reverse proxy, SSL, gzip, caching, security headers

Generate a .gitignore file for Node, Python, Go, Rust, Java, and more

Convert internationalized domain names (IDN) to Punycode and back. Translate Unicode domains to ACE form (xn--) for DNS lookups.

View and analyze PCAP / PCAPNG packet capture files online — packet list, protocol decode, conversations, and filters.

Check SSL/TLS certificate details for any domain — HTTPS, HSTS, redirect, TLS grade

Trace URL redirects — see the full redirect chain from start to final destination

Calculate IPv4 subnet details from CIDR notation: network address, broadcast, mask, wildcard, host range, usable hosts. Subnet list & VLSM split.

Look up DNS records for a domain — A, AAAA, MX, NS, TXT, CNAME, SOA, CAA, SRV

Build DNS zone files visually — compose A, AAAA, CNAME, MX, TXT, and SRV records with RFC validation and export to BIND, Route53, or Cloudflare

Describe your project. Get creative domain names. Check availability instantly via DNS.

View HTTP response headers for any URL. Inspect security headers, copy all headers, copy as curl command.

Geolocate IP addresses. Find country, city, ISP, and more.

Convert IPv4 addresses to IPv6 notation: IPv4-mapped, 6to4, and Teredo formats.

Expand and compress IPv6 addresses. Convert between full notation and shorthand ::, validate, and get reverse DNS, URL-literal, and binary forms.

Find the manufacturer (OUI vendor) for any MAC address. Enter a MAC to see vendor, country, registry block, and locally-administered / multicast flags.

Check if TCP ports are open on a hostname or IP address — enter host:port and see which ports are reachable.

Searchable table of common TCP and UDP port numbers with service descriptions

Generate SPF and DMARC DNS records for email authentication, and test existing records for any domain

Check domain registration, expiry, registrar, nameservers, and availability via RDAP

Scan JavaScript and TypeScript code for security issues — hardcoded secrets, SQL injection, XSS, path traversal, and eval usage.

Analyze email headers for delivery path, SPF/DKIM/DMARC checks, and spoofing detection

Detect homoglyph and mixed-alphabet characters in domains and text to spot phishing and spoofing attacks. Shows confusable Unicode characters with their codepoints and meanings.

Scan regular expressions for catastrophic backtracking vulnerabilities — detect dangerous patterns, generate attack strings, and measure matching performance.

Paste a PEM certificate and inspect all fields: issuer, subject, SANs, validity, serial, signature algorithm, and public key.

Identify hash type from a string — MD5, SHA-1, SHA-256, SHA-512, bcrypt, NTLM and more

Generate Subresource Integrity hashes for CDN scripts and stylesheets — sha256, sha384, sha512

Generate 2FA TOTP codes from a secret key. Paste an otpauth URI or base32 secret and get the 6-digit code with a live countdown.

Hash a password with Argon2id, Argon2i or Argon2d — set memory, iterations and parallelism, or verify a password against an existing Argon2 hash.

Generate htpasswd entries for Apache/Nginx basic authentication — bcrypt, MD5, SHA-1, crypt

Generate OpenSSL commands: self-signed certs, CSRs, certificate inspection, key management, and protocol testing.

Explore WebAuthn passkeys — create, inspect credential structure, and test authentication in your browser

Generate RSA public/private key pairs in PEM and JWK format for JWT signing, SSH, and TLS

Generate an Ed25519 SSH key pair online in OpenSSH format.

Hash a password with bcrypt — pick the cost factor and salt rounds, or verify a password against an existing bcrypt hash.

Check how strong a password really is — entropy bits, estimated offline crack time, weakness flags. Type or paste any password for instant analysis.

Strip dangerous HTML tags, attributes, and scripts to prevent XSS — online HTML sanitizer

Build a Content-Security-Policy header online

Generate WireGuard server and client configs with X25519 keypairs, QR code for mobile import.

Encrypt and decrypt text with AES-256-GCM using a passphrase or a raw key. Portable base64 output.

Anonymize logs before pasting into AI — strip emails, IPs, API keys, secrets, and PII

Validate credit card numbers with the Luhn algorithm, detect card brand, format, mask, and generate Luhn-valid test numbers.

Sign data with a secret key using HMAC-SHA1/256/384/512. Generate signatures for webhooks and APIs, or verify a signature against a payload.

Generate signed JSON Web Tokens with HS256, HS384, HS512, RS256, or ES256. Build payloads with standard claims.

Generate strong cryptographically secure passwords, memorable passphrases, and PINs — bulk mode, copy-ready, deep-link sharing.

Decode SAML responses and requests — view formatted XML, extract claims, validate timestamps, and inspect signatures.

Generate a security.txt file (RFC 9116) with contact info, PGP key, disclosure policy, and expiry — ready for /.well-known/security.txt

Generate a table of contents from Markdown headings

Strip Markdown formatting to plain text. Remove headers, bold, italics, links, code blocks, blockquotes, and lists while preserving paragraph structure.

Convert text to ASCII art using FIGlet fonts — Standard, Slant, ANSI Shadow, Big, Doom, Small and more.

Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case and more naming conventions.

Convert CSV to JSON and JSON to CSV online. Supports headers, custom delimiters, nested objects, and file upload.

Generate bar, line, pie, and scatter charts from CSV data

Explore CSV data in a sortable, searchable table with automatic column type detection, statistics, and pagination — interactive data browsing, no code output.

Convert CSV data into ready-to-use HTML <table> markup. Customize borders, striped rows, hover highlights, responsive overflow, and padding — then copy the code into your project.

Convert CSV data to a formatted Markdown table online. Paste CSV, get a ready-to-use Markdown table.

View CSV and JSON data in a sortable, filterable table with pagination and export

Generate realistic test data: names, emails, phones, companies, jobs, URLs, colors, and more. Plain text, JSON, or CSV.

Convert HTML to plain text — strip tags while keeping paragraph breaks, headings, and lists readable. Paste HTML, get clean text.

Convert JSON arrays to CSV with per-field control — pick exactly which columns to include, flatten nested objects, and choose your delimiter. A dedicated JSON-to-CSV tool with field-level export precision.

Paste a JSON array of objects and view it as a sortable, filterable table. Copy as CSV or HTML.

Sort, deduplicate, number, and transform lists of lines. Sort A-Z, remove duplicates, convert to JSON/CSV arrays, and more — instantly in your browser.

Compare two lists to find common items, differences, and duplicates — union, intersection, only-in-A, only-in-B, and symmetric difference.

Generate Lorem Ipsum, Hipster, Office, Tech, Bacon, or Cupcake placeholder text — paragraphs, sentences, or words.

Build Markdown tables visually. Add/remove rows & columns, set alignment, import CSV, export to .md — all in your browser.

Analyze text readability: Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, ARI. Grade levels, reading ease, and detailed text statistics.

Convert numbers to Roman numerals and back. Supports standard notation (I, V, X, L, C, D, M) plus vinculum (overbar) for values up to 3,999,999. Live conversion with step-by-step breakdown.

Compare two CSV files cell by cell with key-column row matching — highlights added, removed, and changed data

Extract emails, URLs, phone numbers, IP addresses, dates, hex colors, hashtags, and more from any text. Paste content and pull out structured data instantly.

Convert between TOML and JSON formats. Real-time conversion.

Count words, characters, sentences, paragraphs, reading time, and keyword density. Live as you type — with goals, auto-save, find & replace, and export.

Validate YAML syntax online. Check YAML for errors, indentation issues, and duplicate keys with line-level diagnostics.

Paint grid cells to build a CSS grid-template-areas layout visually — name your regions, draw the grid, and copy production-ready CSS and HTML.

Convert and pick OKLCH colors online with HEX, RGB, HSL output and sRGB / Display-P3 gamut checks.

Edit HTML with Tailwind CSS classes and see live preview

Explore CSS anchor positioning — visually build anchor() and position-area layouts with live preview and copyable CSS

Convert CSS length units: px, rem, em, pt, vw, vh, %. Live conversions with configurable root font-size, viewport size, and percentage base.

Compute CSS aspect-ratio from any width × height, simplify ratios (16:9, 4:3, 1:1, …), find a missing dimension, and copy production-ready CSS/Tailwind/JSX. Live visual preview and a library of common ratios.

Visually design CSS border-radius with linked or per-corner controls, elliptical corners, and presets. Copy clean CSS instantly.

Create CSS box shadows with a visual editor. Multi-layer shadows, inset, presets, copy CSS.

See how colors look to users with protanopia, deuteranopia, tritanopia, and achromatopsia. Test palettes for color-blind accessibility.

Check WCAG color contrast ratios for accessibility compliance (AA, AAA).

Convert colors between HEX, RGB, HSL, OKLCH, and named CSS colors. Paste any format or use the color picker — get all formats and contrast preview instantly.

Generate beautiful color palettes from any base color. Complementary, analogous, triadic, tetradic, split-complementary, and monochromatic schemes — with one-click copy and CSS / Tailwind / JSON export.

Extract dominant colors from any image. Get hex, RGB, HSL values, contrast grades, copy-all-as-CSS, deep-link settings.

Generate color scales from a base color — light-to-dark ramps, tints, shades, and saturation scales with hex, RGB, HSL output.

Visually design CSS animations with a live preview, a built-in keyframe preset library (fade, slide, bounce, pulse, spin, shake, zoom, flip and more), full timing/easing/iteration control, a custom keyframe editor, and one-click clean CSS export.

Generate CSS clamp() values for fluid typography and responsive spacing. Set min and max sizes with viewport breakpoints, preview the scaling curve, and copy the CSS.

Visually design CSS clip-path shapes: polygons, circles, ellipses, and insets. Drag points on the canvas, pick from shape presets (triangle, star, arrow, hexagon, message), and copy clean clip-path CSS instantly.

Design CSS filter() effects visually. Adjust blur, brightness, contrast, hue-rotate, saturate, sepia, grayscale, invert and opacity with a live preview, then copy the CSS in one click.

Visually design flexbox layouts. Adjust direction, alignment, wrap, gap, per-item grow/shrink/basis, and item count — copy the CSS in one click.

Create beautiful frosted-glass UI effects with live preview. Tune backdrop blur, transparency, border, shadow, and border-radius. Copy CSS + HTML in one click.

Create beautiful CSS gradients with a visual editor. Linear, radial, and conic. Copy CSS in one click.

Build CSS Grid layouts visually — set columns, rows, gaps, and item placement, then copy production-ready grid-template-columns and grid-template-rows CSS.

Generate CSS-only loading spinners and loaders with customizable colors, sizes, animations and speed.

Generate CSS mask-image effects with gradients, images, and sizing controls — live preview and copy-ready code.

Generate custom scrollbar CSS with visual controls. Design WebKit and Firefox scrollbar styles — width, colors, border radius, hover states.

Analyze multiple CSS selectors at once — get ranked specificity scores in (a,b,c,d) notation, compare, and export as a table.

Build complex CSS transforms visually — translate, rotate, scale, skew, and perspective on X/Y/Z axes. Live 3D cube preview, copy-ready CSS, and one-click presets.

Create CSS-only triangles for tooltips, dropdowns, and speech bubbles

Extract CSS custom properties (variables) from any stylesheet. Paste CSS to see all --var definitions in a sortable, searchable table with live preview and copy support.

Design CSS easing curves visually. Drag control points on the bezier curve, preview live animations, and copy cubic-bezier() CSS in one click.

Create favicons from emoji, letters, or text. Export PNG (16/32/48/64/180px) and ICO.

Click on any pixel in an image to get its exact color in HEX, RGB, and HSL. Includes magnified preview for precise color picking.

Generate soft UI neumorphism shadows with live preview

Design CSS scroll-driven animations with a live preview, scroll() and view() timeline support, axis and range controls, keyframe presets, and copyable CSS output.

Optimize and minify SVG files online. Strip comments, metadata, editor data, and unnecessary whitespace to shrink file size.

Paste any SVG path `d` attribute and inspect it live: anchor & control points, bounding box, path length, per-command breakdown. Auto-fit viewBox, grid, copy normalized path.

Create CSS text shadows with live preview

Convert raster images (PNG, JPG) to clean SVG vector paths. Adjust threshold and tracing mode.

Transcribe audio to text with SRT/VTT export. Speech recognition runs locally with Whisper.

Generate ffmpeg commands from common tasks: convert format, trim video, change resolution, GIF from video, extract audio, compress media.

Shift SRT/VTT subtitle timestamps by offset, scale for FPS conversion, and convert between formats.

Convert, trim, and create GIFs from videos online. Process video in your browser with ffmpeg.wasm — no upload needed.

Generate waveform and spectrogram from any audio file. Visualize frequencies, export as SVG.

Merge, split, and rotate PDF files in your browser. Upload multiple PDFs, reorder pages, extract selected pages.

View photo metadata: camera model, lens, exposure, GPS location, timestamp. Strip EXIF and download clean image.

Read a QR code from an image — upload, paste, or drag a QR picture and extract its URL, WiFi, contact, or text content.

Search, browse, and copy emojis by keyword or category. Click any emoji to copy it to your clipboard.

Remove background from images online. Free background removal for product photos, portraits, and transparent PNG creation.

Generate 1D barcodes for labels, inventory, and packaging. Supports Code128, EAN-13, UPC-A, Code39, Code93, Codabar, ITF-14, and more.

Convert images to Base64 Data URI for inline CSS/HTML, or decode Base64 back to a viewable image. Supports drag-and-drop, preview, copy as CSS/HTML/JSON, and re-encode to PNG/JPEG/WebP.

Compress JPG, PNG, and WebP images to smaller file sizes. Adjust quality, compare before and after sizes, and download the optimized image.

Crop images online with adjustable selection area, fixed aspect ratios, and format conversion. Processed locally in your browser — no upload.

Resize images in your browser with preset dimensions, percentage scaling, and format conversion. JPG, PNG, WebP — processed locally, no upload to any server.

Generate placeholder images with custom dimensions, colors, rounded corners, and text in PNG, JPEG, or WebP. Download or embed inline.

Generate QR codes for URLs, WiFi, text, email, SMS, and vCard. Customize colors and download as PNG or SVG.

Convert SVG images to PNG format. Customizable output size.

Create an HTML email signature for Gmail and Outlook

Create iCalendar (.ics) files for events. Generate calendar invites with title, location, description, all-day or timed, recurrence, and reminders. Download .ics or add to Google Calendar.

Explain Excel and Google Sheets formulas in plain language — paste a formula to see arguments, descriptions, and examples for each function.

Create printable invoices: line items, taxes, discounts, currency, totals, due date. Print-ready layout.

Date math made easy: add or subtract time from a date, find the difference between two dates, count business days, and inspect a date (weekday, ISO week, day of year, quarter, days remaining).

Precision metronome with Web Audio scheduling — set BPM, time signature, accent the downbeat, tap tempo, choose click sounds, and watch the beat pulse.

Spin a weighted random picker — enter options (one per line, optional weights), spin to draw a winner. Saves history, supports remove-after-pick and deep-link options.

Focus timer with work/break cycles, circular progress, audio alerts, and session tracking.

A Swiss-army random generator: random numbers in a range, dice rolls (d6, d20, custom), coin flips, and pick-N from a custom list. Optional seed for reproducible results, statistics, history, and one-click export.

Precision stopwatch with lap timing — millisecond accuracy, best/worst lap detection, CSV export, deep-link state and keyboard shortcuts.

Test your typing speed online — WPM, accuracy, and character count in 30s or 60s modes

Convert duration to seconds and back. Convert seconds to hours, minutes, human readable (1h 30m), colon notation (01:30:20), and ISO 8601 (PT1H30M20S).

Calculate exact age in years, months, and days from a birth date. Find days until next birthday, total days lived, and date-to-date intervals.

Calculate tip and split a bill between any number of people with a tip percentage slider and per-person totals.

Validate ISBN-10 and ISBN-13 checksums, convert between formats, and identify the registration group (language/country) and GS1 prefix.

Calculate your Body Mass Index (BMI) from height and weight in metric or imperial units, with category, healthy weight range, and ideal body weight.

Validate IBAN numbers, check the country, length, and mod-97 checksum. Format, mask, and explain IBAN structure.

Convert numbers to English words — cardinal, ordinal (first, second…), and currency (dollars & cents)

Convert any time across world timezones instantly. Compare UTC, local, and 15+ major cities.

Convert between units: length, weight, temperature, area, volume, speed, digital storage, time, energy, pressure. Real-time.

Decode any 17-character Vehicle Identification Number (VIN) — manufacturer, country, model year, assembly plant, serial, with ISO 3779 check-digit verification.

Generate a sitemap.xml for your website. Add URLs with lastmod, changefreq, and priority, or paste a list of URLs to bulk-import. Live preview, copy, download sitemap.xml.

Generate Open Graph and Twitter Card meta tags from scratch — fill in title, description, and image, see live social card previews, and copy ready-to-paste HTML.

Inspect and debug Open Graph tags from any live URL — fetch the page, extract og: and twitter: meta tags, and preview the social card on every platform before you share.

Generate a privacy policy for your website with GDPR, CCPA, cookies, and data collection sections. Live preview, HTML and Markdown export.

Generate a robots.txt file with allow/disallow rules, sitemaps, and crawl-delay. Live preview, copy, deep-link, and ready-made presets (allow all, block all, block AI bots, WordPress, Shopify).

Test a robots.txt file against specific URLs — paste or fetch a robots.txt, check which user-agents are allowed or blocked, validate syntax, and debug crawling rules.

Generate JSON-LD schema.org markup for Article, Product, FAQ, BreadcrumbList, Event, Organization, LocalBusiness

Preview how your page title, URL, and meta description will appear in Google search results, with character and pixel-width limits.

Parse and analyze sitemap.xml files. View all URLs with metadata, validate structure, and export results to CSV.

Build, parse and validate UTM tracking URLs — single or bulk, 5 presets (Google Ads, Meta, Newsletter, Organic, Referral), paste-and-parse existing URLs, smart case + space normalization, deep-link sharing.

Generate a service worker (sw.js) online — precache list, runtime cache strategies (cache-first, network-first, stale-while-revalidate), navigation fallback, registration snippet

Check which web APIs and features your browser supports — Service Workers, WebP, Clipboard, Crypto, WebGL, Container Queries, View Transitions, WebGPU and dozens more, with live support badges

Build a Web App Manifest (manifest.json) for installable PWAs. Live JSON preview, validation, icons, shortcuts, screenshots, theme/background colors, display modes. Copy, download, share link.

Live viewport size, screen resolution, device pixel ratio, color scheme, orientation, network type, CPU cores, touch support, and more — everything a frontend developer needs for responsive testing. Updates in real time as you resize the window.

Decode any User-Agent string into browser, engine, OS, device type, CPU architecture, and bot detection. Compare two UAs side-by-side, copy individual fields, deep-link via #ua=.

Validate a web app manifest.json — required fields, icons, start_url, scope, display mode, screenshots, and shortcuts.

Convert salary between hourly, daily, weekly, monthly, and annual amounts. Compare job offers and freelance rates with adjustable hours per week.

Calculate investment growth with compound interest: lump sum or recurring contributions, multiple compounding frequencies, inflation adjustment, effective APY, growth chart, and year-by-year breakdown.

Evaluate math expressions safely (no eval): arithmetic, trigonometry, logarithms, factorials, powers, roots, percentages, and constants (pi, e, tau). Supports parentheses, memory variables, and step-by-step trace.

Add, subtract, multiply, and divide fractions and mixed numbers. Auto-simplifies to lowest terms, shows step-by-step work, converts between fractions, mixed numbers, and decimals.

Calculate monthly payments, total interest, and a full amortization schedule for any fixed-rate loan or mortgage. Add extra payments to see interest savings, view a balance chart, and export to CSV.

Format numbers with thousands separators, decimal places, currency, scientific and compact notation. Pick a locale or currency and copy the result.

Calculate running pace, finish time, or distance. Enter any two of pace, time, and distance — get the third, plus splits per kilometre and mile.

Solve everyday percentage problems: X% of Y, what % is X of Y, percent change (increase/decrease), find the original before a percentage change. Live results, history, and shareable deep-links.

Calculate permutations nPr and combinations nCr — exact big-integer results for n up to 5000, with step-by-step factorial breakdown.

Check if a number is prime, find the next prime, factorize into prime factors, list all primes up to a limit, and more — live in your browser.

Add or remove sales tax and VAT from any amount. Find the price before tax, the tax amount, and the final price with tax for any tax rate.