Input Text
Enter the URL to encode or decode
Output
The result of your URL encoding or decoding operation
What Is the URL Decoder / Encoder Tool?
The URL Decoder / Encoder is a free online utility that helps you encode or decode URL components to ensure special characters are transmitted correctly across browsers, servers, and API endpoints.
The URL Decoder/Encoder uses native browser functions - encodeURIComponent() for encoding and decodeURIComponent() for decoding. Encoding converts special characters (spaces, &, ?, #, etc.) into percent-encoded sequences. Decoding reverses percent-encoded sequences back to their original characters.
Key Features
- Two-way encoding and decoding with simple mode toggle
- Native browser API integration for standards-compliant conversion
- Percent-encoding for all special characters including spaces, symbols, and Unicode
- Real-time output updates as you type, paste, or switch modes
- Error handling for malformed percent-encoded input during decoding
- Complete client-side processing with zero data transmission
Why Use This Tool
- Ensures URLs with special characters are correctly transmitted across networks and servers
- Prevents broken links and malformed API requests caused by unencoded characters
- Helps debug URL encoding issues in web applications and API integrations
- Supports international characters and Unicode in URL parameters
- Processes entirely in-browser with complete privacy for sensitive URL data
Common Use Cases
- Encoding query string parameters for API requests to prevent parsing errors
- Decoding percent-encoded URLs from web server logs for readability
- Preparing user-generated content for safe URL inclusion in web applications
- Debugging URL encoding issues in form submissions and redirect handling
- Converting international characters to percent-encoded format for URL compatibility
Technical Details
This tool uses the native browser functions encodeURIComponent() and decodeURIComponent(). Unlike encodeURI(), which preserves URL structure characters, encodeURIComponent() encodes ALL special characters, making it suitable for encoding individual query parameters and URL components.
Frequently Asked Questions
Is this tool free to use?
Yes, the URL Decoder / Encoder is completely free to use with no signup, registration, or usage limits required.
Is my data sent to a server?
No, all processing happens locally in your browser. Your data never leaves your device and is not stored or logged anywhere.
What is URL encoding?
URL encoding converts special characters into a format safe for transmission. For example, spaces become %20 and & becomes %26.
When should I encode a URL?
Encode URLs when they contain special characters, spaces, or non-ASCII characters. Common scenarios include query strings and API requests.
Is URL encoding reversible?
Yes, URL encoding is fully reversible. Encoding followed by decoding returns the original string.
Can I use this tool offline?
Yes, since all processing happens client-side in your browser, this tool works offline once the page has loaded.
Credits & Source
Maintained by Vijay Hardaha. This tool is built with modern web technologies and industry-standard open-source libraries to deliver reliable, high-quality results.