⚡ deftools.io

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

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

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 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. 100% client-side.

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

Compare two pieces of text line by line with word-level highlighting. Shows additions, deletions, and similarity.

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. 100% client-side via Web Crypto + pure-JS MD5.

Encode and decode HTML entities. Convert special characters.

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

Generate TypeScript interfaces from JSON. Paste JSON, get typed interfaces.

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

Format, validate, minify and escape JSON. Real-time as you type.

Query JSON with JSONPath expressions ($.store.book[*].author, $.users[?(@.age>18)]). Inline engine, no libraries. Live results, path highlighting, sample data, deep-linking. 100% client-side.

Decode and inspect JSON Web Tokens. View header and payload.

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

Searchable database of MIME types and file extensions. Reverse lookup (extension → MIME), forward lookup (MIME → extensions), category filters, common-type cheatsheet, and copy helpers. 100% client-side.

Convert numbers between binary, octal, decimal, and hexadecimal. Real-time conversion.

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 — 100% in your browser.

Test regular expressions with live highlighting, capture groups, replace mode, and common pattern presets.

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.

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

Format and beautify SQL queries. Supports keywords, joins, subqueries.

Convert Unix timestamps (seconds or milliseconds) to human-readable dates and back. Live conversion, multiple formats, relative time, and deep-link sharing.

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. 100% client-side.

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 random UUIDs (v4) and timestamp-based UUIDs (v7).

Format, validate, minify and convert XML. Syntax-highlight, XML→JSON, stats, and tree view — all in your browser.

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

Look up DNS records: A, AAAA, MX, NS, TXT, CNAME, SOA.

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

View HTTP response headers for any URL.

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

Check SSL certificate details for any domain.

Check domain registration and availability via RDAP.

Encrypt and decrypt text with AES-256-GCM using a passphrase (PBKDF2 key derivation) or a raw key. Portable base64 output includes salt, IV, and ciphertext. 100% client-side via Web Crypto.

Validate card numbers with the Luhn algorithm, detect brand (Visa, Mastercard, Amex, Discover, JCB, Diners, UnionPay, Maestro, MIR, Elo, Hipercard), format, mask/unmask, and generate Luhn-valid test numbers. 100% client-side — no number ever leaves your browser.

Sign data with a secret key using HMAC-SHA1/256/384/512. Generate signatures for webhooks & APIs, or verify a signature against a payload. Uses native Web Crypto — your data never leaves your browser.

Generate strong, cryptographically secure passwords. Customizable length and character sets.

Analyze password strength in real-time. Check entropy, common patterns.

Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and more.

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

Generate realistic test data: names, emails, phones, addresses, UUIDs.

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

Generate Lorem Ipsum placeholder text. Words, sentences, or paragraphs.

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

Count words, characters, sentences, reading time, keyword frequency, and readability score. Live as you type — with goals, auto-save, and export.

Create beautiful CSS box shadows with a visual editor. Copy the CSS in one click.

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

Convert colors between HEX, RGB, HSL, and named CSS colors. Pick any color and copy values instantly.

Extract dominant colors from any image. Get hex, RGB, HSL values, contrast grades, copy-all-as-CSS, deep-link settings. 100% client-side median-cut quantization.

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, and item count — copy the CSS in one click.

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

Visually build CSS Grid layouts. Set columns, rows, gaps, and item placement — copy production-ready CSS in one click.

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.

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.

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. 100% client-side.

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.

Resize images in your browser. Supports JPG, PNG, WebP. No upload needed.

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

Convert SVG images to PNG format. Customizable output size.

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).

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

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.

Preview & generate Open Graph and Twitter Card meta tags. See how your link looks on Facebook, X, Slack, Discord.

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, 100% client-side.

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

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.

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

Spin a weighted random picker — enter options (one per line, optional weights), spin to draw a winner. Saves history, supports remove-after-pick, deep-link options, 100% client-side.