Developer Tools5 min read•2026-05-30
URL Encoder Decoder Free: Encode URLs Online
By FreeToolbox Team
URL Encoder Decoder Free: Encode URLs Online
Need to encode or decode URLs? Our free tool converts special characters to percent-encoded format.
What is URL Encoding?
URL encoding converts characters not allowed in URLs into a safe format. Special characters are replaced with % followed by hex digits.
Example: "hello world" becomes "hello%20world"
Characters That Need Encoding
| Character | Encoded | Reason |
|---|---|---|
| Space | %20 | Reserved separator |
| ! | %21 | Unsafe |
| # | %23 | Fragment identifier |
| & | %26 | Query separator |
| ? | %3F | Query start |
| = | %3D | Assignment |
Why Encode URLs?
- Query parameter safety
- API request formatting
- Form data submission
- OAuth redirect URLs
- Special characters in paths
FreeToolbox URL Encoder/Decoder
Features: - 100% free, no registration - Encode to percent-encoding - Decode percent-encoded text - One-click copy
Try: [URL Encoder/Decoder](/tools/url-encoder)
How to Use
Encode 1. Paste URL or text 2. Click Encode 3. Copy output
Decode 1. Paste encoded text 2. Click Decode 3. Copy decoded text
Tips for URL Encoding
- Encode values, not the whole URL structure
- Over-encoding can break URLs
- Test in browser before deploying
- Different from URI encoding (encodeURI vs encodeURIComponent)
Frequently Asked Questions
**Q: When should I encode URLs?** A: Whenever URLs contain special characters or spaces.
**Q: Is encoding reversible?** A: Yes, decoding returns original text.
[URL Encoder/Decoder](/tools/url-encoder)