What is URL percent-encoding?
Percent-encoding replaces unsafe ASCII characters with a % followed by two hexadecimal digits representing the character code (e.g. space becomes %20).
Tool Categories
URL Encoder & Decoder - Percent-Encoding Tool | 1ClickTools
Encode and decode URLs and query parameters instantly. Convert special characters into percent-encoded strings 100% locally in browser.
About This Tool
Uniform Resource Locators (URLs) only allow a limited set of unreserved ASCII characters (letters, numbers, and select symbols like -, _, ., ~). Spaces, punctuation marks, and non-ASCII international characters in web query strings must be percent-encoded (e.g. spaces become %20 or +) to prevent web server request errors. Our browser-native URL Encoder/Decoder provides dual-mode string conversion. It uses native JavaScript encodeURIComponent() and encodeURI() functions to convert special characters into percent-encoded ASCII strings, and decodeURIComponent() to restore percent-encoded URLs to clean text. Because all encoding and decoding operations execute inside client-side RAM, your private API endpoint URLs, query parameters, and web tokens are never logged or transmitted over external networks.
Frequently Asked Questions
What is the difference between encodeURI and encodeURIComponent?
encodeURI leaves URI structure characters intact, whereas encodeURIComponent encodes all special symbols.
Is my URL payload logged or uploaded to a server?
No. 1ClickTools encodes URLs 100% locally inside your browser memory.
Why does space become %20 or + in URLs?
%20 is standard percent-encoding for spaces in URIs, while + is commonly used in application/x-www-form-urlencoded forms.
Does it support international UTF-8 characters?
Yes! Accented characters and international scripts are encoded into valid multi-byte percent strings.
Works on mobile browsers?
Yes, fully responsive on mobile Safari, Chrome, Edge, and Firefox.
Can I encode complex JSON strings passed in URL parameters?
Yes! Perfect for encoding JSON objects into web URL query parameters.
Is there an input length limit?
No, encode long URLs or data payloads freely.
Is any software download required?
No, works instantly in standard web browsers.
Is 1ClickTools URL Encoder free?
Yes, 100% free with no limits.