URL Encoder / Decoder
Safely encode and decode URLs and URI components instantly using a fast browser-based tool.
Features
- URL Encoding: Safely encode text strings or complete URLs so they can be transmitted over the internet without data loss or corruption.
- URL Decoding: Reverse the URL encoding process to read the original text or URL.
- Component vs Full URI: Support for both standard full URI encoding and component-level encoding.
- Browser-Based Processing: Your data never leaves your device. This tool runs 100% locally.
- Developer Friendly: Includes 1-click copy and download functionality, perfect for integrating with your workflows.
How it works
URL encoding, also called percent-encoding, replaces spaces and reserved characters with a percent sign and hexadecimal code so text can be used safely in a URL. This free URL encoder and decoder runs in your browser and supports both complete URLs and individual parameter values.
How to Encode a URL Online
- Select Encode URL and paste a URL, query value, or plain text.
- Use Component mode for one query parameter and Full URI mode when the input is already a complete URL.
- Copy or download the encoded result.
How to Decode a URL
- Select Decode URL and paste percent-encoded text.
- Choose the same component or full-URI interpretation used when encoding.
- Copy or download the readable result. Invalid percent-encoded input is reported instead of being silently changed.
Choose the right encoding mode
Use full URI encoding for an already structured URL when its separators should remain meaningful. Use component encoding for one query-string value, such as a search term containing spaces, &, or ?. Keeping those cases separate prevents a parameter from accidentally changing the structure of the surrounding URL.
Limit: Percent-encoding does not sanitize HTML, prevent SQL injection, or validate that a destination is safe. Encode at the boundary where data is inserted and still validate URLs in the application that consumes them.
Related Tools
Base64 Converter
URL encoding and Base64 encoding are both used to safely transmit data — learn the difference and when to use each.
Regex Tester
Use regular expressions to parse, validate, or extract parts of URLs before encoding them.
URL Encoding Guide
Understand percent-encoding, query parameters, encodeURI, and encodeURIComponent.
Frequently Asked Questions
What is URL Encoding used for?
URL encoding replaces unsafe ASCII characters with a `%` followed by two hexadecimal digits. It is required when passing data via URL query strings or form submissions to ensure data isn't misinterpreted by the web server.
What is the difference between Full URI and URI Component encoding?
Full URI encoding (encodeURI) assumes the string is a complete URI and doesn't encode reserved characters that have special meaning in a URI (like : / ? @). URI Component encoding (encodeURIComponent) encodes all these reserved characters, making it suitable for encoding individual query string parameters.
Is this URL Encoder safe for sensitive data?
Yes! Like all our tools, this URL Encoder processes everything locally in your browser using JavaScript's native encoding functions. Your data is never sent to a server.