URL Encoder (Percent-Encode Strings Online)
Web browsers can only process URLs using the ASCII character set. If your link contains special characters or emojis, they must be mathematically translated into a valid percent-encoded format. Use our professional-grade URL Encoder to sanitize your strings locally.
100% Private & Secure
This tool runs completely inside your browser using client-side WebAssembly and JS. Zero data is ever sent to our servers.
Raw String / URL
Encoded Output
How to use this tool
- Type or paste the raw string you want to encode into the left text area.
- The tool instantly applies encodeURIComponent logic to your input.
- Your sanitized, ASCII-safe URL string appears immediately in the right box.
- Click 'Copy' to use the encoded string in your code or browser address bar.
Example Usage
hello world @ devtoolslabs
hello%20world%20%40%20devtoolslabs
When to use this tool
- Encoding tracking parameters that contain spaces or special characters for marketing campaigns.
- Sanitizing user-generated text to be used as a URL slug in a CMS.
- Preparing complex JSON strings to be passed as a query parameter in a GET request.
Frequently Asked Questions
What is URL encoding?
URL encoding, also known as percent-encoding, replaces non-ASCII characters with a '%' followed by their hexadecimal value. This ensures that the URL remains valid when sent over the internet.
Which characters are encoded?
Characters like spaces, ampersands (&), question marks (?), and slashes (/) are encoded because they have special meaning in URLs. Standard letters and numbers are usually left as-is.
Is this encoder safe for private data?
Yes. The encoding happens entirely on your device using native browser APIs. No data is ever sent to our servers.