Query parameter cleanup
Use it when a value contains spaces, symbols or non-ASCII text and needs safe URL encoding.
Free URL Encoder & Decoder
Encode or decode URLs and query strings locally in your browser.
Files and text are processed locally in your browser. No upload. No signup.
Tip: encode first, then swap if you want to test the reverse conversion.
Output
How to use
- 1 Paste a URL, query string or encoded value.
- 2 Choose encode or decode.
- 3 Copy the result for debugging or sharing.
Features
- URL-safe encoding.
- Decoding for query inspection.
- Useful for debugging links and parameters.
Common use cases
Escaping query string values
Reading a messy encoded URL from a bug report
Preparing safer links for redirects and APIs
Example input and output
Plain text input
Encode a redirect target with spaces and symbols
https://example.com/search?q=hello world&lang=zh-CN
Encoded output
Result you can copy or download
https%3A%2F%2Fexample.com%2Fsearch%3Fq%3Dhello%20world%26lang%3Dzh-CN
Encoding prevents spaces and special characters from breaking URLs in redirects, query params or API payloads.
When this tool is the right fit
Bug report decoding
It is helpful when a pasted redirect or callback URL is unreadable because everything is percent-encoded.
API and redirect prep
You can quickly encode or decode one-off strings without writing a helper script.
Quick comparison
| If you need | Best choice | Alternative | Why |
|---|---|---|---|
| Readable encoded URL debugging | URL Encoder & Decoder | Manual inspection | Decoding turns percent-encoded text back into something you can understand quickly. |
| Compact JSON payloads | JSON Minifier | URL Encoder & Decoder | Encoding is for URL safety, not JSON size reduction. |
| One-off encoding in browser | URL Encoder & Decoder | Built-in language helpers | It is faster than opening a code project for a simple conversion. |
Common mistakes
- Encoding an entire URL twice and ending up with unreadable output.
- Decoding a value that was not actually URL-encoded.
- Forgetting that only certain parts of a link may need encoding.
FAQ
What can I encode with this tool?
You can encode full URLs, query strings or any plain text that needs URL-safe escaping.
Can I decode encoded links here too?
Yes. The tool supports both encoding and decoding in the browser.
Does it handle non-ASCII characters like Chinese or emoji?
Yes. Non-ASCII characters are encoded to their percent-encoded form correctly.
Is the encoding reversible?
Yes. Encoding and decoding are symmetric, so you can safely round-trip your data.