URL Encoder
Percent-encode text or full URLs for safe use in query strings and links.
Runs in your browser — your data never leaves your deviceFree, no sign-up
Percent-encoded output
The percent-encoded text will appear here.
How it works
URL encoding (percent-encoding) replaces unsafe characters with a % followed by the character’s hexadecimal byte value. Letters, digits and a small set of unreserved characters (- _ . ~) are left as-is.
The two modes map directly to the browser’s native encodeURIComponent and encodeURI functions, so the output matches what JavaScript produces exactly — including full UTF-8 handling for non-ASCII text.
Features
- Component and full-URL encoding modes
- Full Unicode support via UTF-8 percent-encoding
- Copy, download and upload actions
- Live mode switching with instant re-encode
- 100% client-side — nothing leaves your browser
How to use
- Paste the text or URL to encode.
- Pick a mode: Component for a single value, Full URL for a complete URL.
- Press Encode and copy the result.
Example
Input: café & bar
Output: caf%C3%A9%20%26%20barFrequently asked questions
- What is the difference between the two encoding modes?
- Component mode (encodeURIComponent) encodes everything except letters, digits and - _ . ! ~ * ' ( ) — use it for a single query-string value or path segment. Full URL mode (encodeURI) keeps URL structure characters like : / ? # & = intact — use it when the input is already a complete URL and you only need its special characters (spaces, accents, etc.) escaped.
- When do I need URL encoding?
- Whenever text containing spaces, accents, ampersands, question marks or non-ASCII characters is placed into a URL — query-string parameters, path segments, and redirect targets. Unencoded special characters change the URL's meaning or make it invalid.
- How are spaces encoded?
- As %20 in this tool (and in query strings generally, per RFC 3986). You may also see + used for spaces in HTML form submissions (application/x-www-form-urlencoded) — that is a form-encoding convention, not standard URL encoding.
- How are Unicode characters encoded?
- Each character is converted to its UTF-8 byte representation and each byte is percent-encoded — for example é becomes %C3%A9. This is what browsers and every standard library do.
- Is my text sent to a server?
- No. Encoding happens entirely in your browser with JavaScript. Nothing you type is transmitted anywhere — you can verify this in your browser's network inspector.