Guide
URL Encoder / Decoder online
Encode URL text for query parameters or decode percent-encoded strings back into readable text. The tool uses browser-standard URL encoding functions.
developer tool
URL Encoder / Decoder
Encode or decode URLs and query parameters online.
0 / 200,000 characters
How to use URL Encoder / Decoder
Choose encode or decode
Select the conversion mode for the URL text you have.
Paste input
Enter a URL segment, query parameter, or encoded string.
Copy the result
Copy the encoded or decoded result for use in links, code, or tests.
Common uses for URL Encoder / Decoder
- Encoding query parameters
- Decoding copied URLs
- Testing redirect URLs
- Preparing API request values
Why use this developer tool?
- Use browser-standard encodeURIComponent and decodeURIComponent behavior.
- Handle spaces and special characters safely.
- Show clear errors for malformed encoded text.
- Work instantly with no server request.
URL Encoder / Decoder FAQ
Which encoding function does this use?
The tool uses encodeURIComponent for encoding and decodeURIComponent for decoding.
Does it decode malformed percent encoding?
Malformed encoded input is rejected with a clear error message.
Is input sent to the server?
No. URL encoding and decoding happen in your browser.