URL Encoder
Encode/decode URL components instantly for API calls, query debugging, and safe URL composition.
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How to use URL Encoder
- 1
Enter input.
- 2
Adjust options.
- 3
Review output.
What You Can Do
- ✓Instant encode/decode mode switch
- ✓Supports multilingual input
- ✓Validation error display for invalid decode input
- ✓One-click output copy
FAQ
Q. Why does decode sometimes fail?
A. The input must be a valid percent-encoded string.
Q. Can I use this for query params?
A. Yes. It is especially useful for parameter encoding checks.
Q. Is data sent outside the browser?
A. No. Processing is local only.
Technical Notes
Built on encodeURIComponent/decodeURIComponent for standards-based URL conversion.
Error states are surfaced immediately to prevent silent malformed output.
Security
Input data is processed locally and never uploaded.
Examples, URL Handling Cautions, and Common Mistakes
Examples
- Encode search keywords with non-ASCII characters for query parameters.
- Prepare webhook or API request values before assembling the final URL.
- Decode an existing URL to inspect which parameters are being passed.
Cautions
- Usually encode only parameter values, not the entire URL.
- Encoding an already encoded string creates double encoding.
- `+` and `%20` may be treated differently depending on form encoding and runtime.
Common Mistakes
- Encoding the whole URL and turning `https://` into escaped text.
- Missing double encoding and causing broken links or garbled text.
- Sharing URLs that still include private tokens or keys.