URL Encoder / Decoder

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

Input

Algorithm

Output

Quick Reference

encodeURIComponent

Encodes all special chars except A–Z a–z 0–9 - _ . ! ~ * ' ( ). Best for query parameter values.

encodeURI

Preserves URL-reserved chars ; , / ? : @ & = + $ #. Use for full URLs.

Base64

Binary-to-text encoding via btoa/atob. Note: UTF-8 safe via TextEncoder.