100% Client-Side Processing
URL Encoder & Decoder
Encode and decode URLs instantly with proper escaping. All processing happens in your browser - your data never leaves your device.
URL Processing
encodeURI() - Encodes a full URL while preserving protocol separators (://) and query structure.
Validating Input...
How To Use The URL Encoder
1
Enter Your URL or Text
Paste the URL or text you want to encode or decode into the input textarea above.
2
Select Processing Mode
Choose between encode/decode and URI/URIComponent modes based on your needs.
3
Process Your Data
Click the process button. Your data will be encoded or decoded instantly in your browser.
4
Copy or Swap
Copy the result to your clipboard or use the swap button to process it again in reverse.
Frequently Asked Questions
URL encoding, also known as percent-encoding, converts characters into a format that can be transmitted over the Internet. Special characters like spaces, quotes, and non-ASCII characters are replaced with a "%" followed by two hexadecimal digits representing the character's byte value.
URLs can only contain ASCII characters. Special characters like spaces, ampersands, question marks, and non-English characters must be encoded to be safely transmitted. Without encoding, these characters could be misinterpreted by servers or cause errors in web applications.
encodeURI() is for encoding complete URLs and preserves URL structure characters like protocol (://), domain separators, and query parameters (?, &, =, #). encodeURIComponent() is for encoding individual URL components like query parameter values and encodes ALL special characters including those that define URL structure.
Use encodeURI() when you have a complete URL that needs encoding. Use encodeURIComponent() when encoding individual query parameter values, path segments, or any URL component. For example, encode the entire URL with encodeURI(), but encode each query value separately with encodeURIComponent().
If you try to decode a malformed URI sequence (like invalid percent-encoded characters), the tool will display an error message. Common issues include incomplete percent sequences (like %2 without the second digit) or incorrectly encoded characters. The error message will help you identify the problem.
Yes, you can decode multiple times if a URL has been encoded repeatedly. Use the "Swap & Process" button to quickly re-process the output. The tool will attempt to decode the text each time until it reaches the original unencoded string.
encodeURI() encodes: space, ", <, >, #, %, {, }, |, \, ^, ~, [, ], `, and non-ASCII characters. encodeURIComponent() encodes all of those PLUS: :, /, ;, ?, &, =, +, $, ,, and @. Letters, digits, and - _ . ! ~ * ' ( ) are never encoded.
Yes, completely. All encoding and decoding operations happen locally in your browser using JavaScript. No data is ever sent to any server. Your URLs and text remain entirely on your device throughout the entire process, ensuring complete privacy.
All URL encoding and decoding are performed entirely in your browser. No data is stored, transmitted, or processed on any server. Your information remains completely private.
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