URL Encoder & Decoder
Easily encode or decode URL strings and components. Our tool uses encodeURIComponent for safe, browser-based processing. Perfect for developers dealing with query strings and special characters.
Why is URL Encoding Necessary?
ASCII Characters Only
URLs can only contain a specific set of characters from the ASCII set. Any character outside this set must be encoded.
Reserved Characters
Characters that have a special meaning in URLs (like `&` or `?`) must be encoded to avoid being misinterpreted by the server.
Data Integrity
Encoding ensures that parameters passed in the URL (e.g., search queries) are interpreted correctly as data, not as part of the URL structure.
Common Reserved Characters
| Character | Encoded Value | Purpose |
|---|---|---|
| %20 | Space | |
| / | %2F | Path separator |
| ? | %3F | Query string separator |
| & | %26 | Parameter separator |
| # | %23 | Fragment/anchor |
100% Client-Side Processing
This tool runs entirely in your browser using JavaScript. We do not upload, store, or analyze your data. Everything you process stays on your device.
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FAQ
What is URL Encoding?
URL encoding, also known as percent-encoding, is a mechanism for converting characters that have a special meaning in URLs (like spaces, '&', '?', '#') into a safe format that can be transmitted over the internet. Each special character is replaced by a '%' sign followed by its two-digit hexadecimal code.
Is my data sent to a server?
No. This tool operates entirely within your web browser. Your data is never uploaded or stored on any server, ensuring 100% privacy and security.
What's the difference between encodeURI() and encodeURIComponent()?
This tool uses `encodeURIComponent()`, which is generally safer and more thorough. It encodes reserved characters that are essential to the URL's structure (like `/`, `?`, `&`, `#`) to ensure they are treated as literal text, whereas `encodeURI()` preserves them.