URL Encoder/Decoder — Percent-Encoding Tool
Encode and decode URL strings instantly in your browser. Converts special characters to percent-encoding and back. Handles spaces, Unicode, query parameters, redirect URLs, and all RFC 3986 reserved characters.
How to Use URL Encoder/Decoder — Percent-Encoding Tool
How to Use the URL Encoder/Decoder:
Select Mode: Choose Encode to convert plain text to percent-encoded format, or Decode to convert a percent-encoded string back to readable text.
Enter Input: Type or paste your text (for encoding) or your URL-encoded string (for decoding) into the input area. The tool handles spaces, Unicode characters, emoji, and all special characters correctly.
Click Convert: Click the Convert button to perform the encoding or decoding. The result appears in the output area immediately.
Copy Output: Click Copy Output to copy the result to your clipboard.
Swap: Use the Swap button to move the current output into the input field and switch modes — useful for round-trip testing.
Try a Sample: Click Sample to load an example input. The conversion runs automatically.
Clear: Click Clear to reset all fields and start fresh.
Common Use Cases:
- Query parameters: Safely encode search terms and values before appending to URLs (
hello world→hello%20world) - Redirect URLs: Encode callback URLs passed as query parameters to external services
- API requests: Prepare URL-safe data for GET request query strings
- OAuth and authentication: Encode redirect URIs and state parameters
- Debugging: Decode percent-encoded data from logs, cookies, or API responses
- Form data: Handle application/x-www-form-urlencoded content
What Gets Encoded:
- Spaces:
%20 - Reserved characters:
!,#,$,&,',(,),*,+,,,/,:,;,=,?,@,[,] - Non-ASCII and Unicode:
你好→%E4%BD%A0%E5%A5%BD - Safe characters NOT encoded:
A-Z,a-z,0-9,-,_,.,~
Tips:
- Use Encode mode for individual query parameter values, not entire URLs
- URL encoding is NOT encryption — anyone can decode it instantly
- Spaces encode as
%20(standard) not+(legacy form encoding) - All processing runs locally in your browser — nothing is sent to any server
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