Free URL Encoder / Decoder Online
Free URL Encoder / Decoder Online is a free online tool by US AI. Paste any text and encode it for safe use in URLs — or paste a percent-encoded string and decode it back. It runs completely in your browser — no signup, no download, works on mobile and desktop.
📖 How to use
- Paste your text in the box above — or directly in the tool itself.
- Press Encode to turn it into a URL-safe string, or Decode to read a %XX-encoded string back.
- Copy the result and use it in your link, query string, form or message.
✨ Why use this tool?
US AI's free URL encoder / decoder online is fast, private and 100% free forever. Percent-encoding keeps query params, ? & = # characters and non-ASCII text (like Urdu) valid inside URLs — without it, links break or lose data. Bookmark this page and share it with anyone who needs it.
⚡ Quick examples
Encoding is instant. Here are two real examples you can try in the tool above:
| Text | URL encoded |
|---|---|
Hello World | Hello%20World |
a=1&b=2 | a%3D1%26b%3D2 |
❓ Frequently asked questions
What is URL encoding (percent-encoding)?
URL encoding converts reserved or non-ASCII characters into a %XX format, where XX is the character's hex code — for example a space becomes %20 and & becomes %26. This keeps links valid when they contain characters that have a special meaning in URLs.
When do I need to encode a URL?
Encode text whenever it goes inside a query string, email, form submission, or social post — especially if it contains spaces, & ? = # characters, or non-English text such as Urdu, which browsers cannot place raw into a URL.
Is my text uploaded anywhere?
No — encoding and decoding run 100% in your browser with JavaScript's encodeURIComponent / decodeURIComponent. Nothing leaves your device, and no signup is required.