Universal URL Encoder & Decoder Utility
Web addresses can only contain a limited set of ASCII characters. Unsafe characters like spaces, quotes, ampersands, and non-ASCII characters must be percent-encoded (RFC 3986) to prevent broken links or security vulnerabilities.
Interactive URL Encoder/Decoder Workspace
Active ToolEncode text and query parameters for safe web URLs or decode percent-encoded URLs into human-readable characters.
Ready to use: Open the interactive widget above.
All computations, image conversions, and text analyses execute client-side directly on your device.
How to Use the URL Encoder/Decoder
- Select whether to "Encode" or "Decode".
- Paste the URL, path, or query string into the input box.
- Choose between encodeURIComponent (for query parameter values) or encodeURI (for complete URLs).
- Copy the properly encoded or decoded string.
Practical Example: Encoding a search query with spaces and symbols
https://example.com/search?q=personal loan & rates 2026
https://example.com/search?q=personal%20loan%20%26%20rates%202026
Spaces converted to %20 and the ampersand inside the query parameter converted to %26.
Useful Tips & Best Practices
- Use `encodeURIComponent` when encoding individual query string values like parameter tokens or search terms.
- Use `encodeURI` when encoding a full URL while preserving valid protocol (https://) and path delimiters (/).
- The decoder automatically handles both `%20` and `+` representations of spaces.
Frequently Asked Questions
What is percent-encoding?
Percent-encoding is a mechanism where characters outside the standard URL character set are replaced with a percent sign (%) followed by their two-digit hexadecimal ASCII representation.
What happens if I try to decode an invalid URL string?
The tool catches malformed URI sequences and displays a helpful error message instead of failing silently.
Does the tool log the URLs I encode?
No. All URL encoding and decoding operates locally inside your browser tab.
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