URL Encoder & Decoder – Percent-Encoding Online Tool
Safely encode or decode special characters in URLs for query parameters and API payloads. All conversions and calculations happen locally inside your browser memory — no data is ever transmitted over network connections.
URL Encoder & Decoder
⚡ How URL Encoder & Decoder Works
Paste Input String
Enter raw URL strings or query parameter values into the editor.
Select Encode or Decode Mode
Choose standard RFC 3986 percent-encoding or decoding mode.
Copy Escaped Output
Obtain clean URL-safe outputs for API requests.
💻 Code Example & Output
Converts reserved characters (spaces, ampersands, slashes) into % hex representations.
https://example.com/search?q=HTML Compiler & Developer Tools!https%3A%2F%2Fexample.com%2Fsearch%3Fq%3DHTML%20Compiler%20%26%20Developer%20Tools%21🎯 Key Use Cases for URL Encoder & Decoder
Constructing REST API Query Parameters
Escape special characters like spaces (%20), ampersands (%26), and question marks in request query parameters.
Sanitizing OAuth Redirect URLs
Encode redirect_uri target parameters sent to authentication providers.
Handling Webhooks & Form Submissions
Decode incoming application/x-www-form-urlencoded payloads.
Parsing Deep Links in Mobile Apps
Safely parse parameters passed through custom URI scheme links.
💡 Frequently Asked Questions
Q: Why is URL encoding necessary?
URLs can only transport ASCII characters. Special symbols like spaces, quotes, and slashes break URL parsing unless percent-encoded.
Q: What is the difference between encodeURI and encodeURIComponent?
encodeURI preserves protocol and domain syntax (http://), while encodeURIComponent escapes all reserved symbols for query string values.
Q: Is this encoder client-side?
Yes, conversion relies directly on native browser JavaScript encodeURIComponent and decodeURIComponent APIs.
Q: What character encoding is used?
Percent-encoding operates on UTF-8 octets, ensuring full compatibility across international character sets.
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