💻Developer Utilities

URL Encode & Decode
Online & Free

Percent-encode special characters or decode query strings instantly in your browser. 100% private with zero server uploads.

URL / TEXT INPUT0 chars
RESULT OUTPUT0 chars

How to Encode or Decode URLs

1

Input URL or String

Paste your raw query string or encoded percent-sequence.

2

Instant Transformation

The browser encodes or decodes character bytes in real time.

3

Copy Sanitized Result

Use the resulting sanitized URL safely in your applications and API calls.

Avoid Malformed URI & Query Breakages

Modern web applications rely extensively on query strings to pass tracking IDs, callbacks, and authentication tokens. If query parameters contain unescaped ampersands (&), slashes, spaces, or hashes, servers misinterpret where parameters begin and end. FileConvert lets you cleanly escape strings so your URLs transmit without corrupting backend routing.

Private Debugging in Local Sandbox

Developers frequently inspect OAuth callback redirects containing sensitive access tokens, state payloads, and client secrets. Because this utility processes everything in client-side memory, no authentication tokens are ever sent across the network.

Frequently Asked Questions

What is the difference between encodeURI and encodeURIComponent?

encodeURI preserves protocol and path delimiters like http://, /, and ?, which is suitable for complete URLs. encodeURIComponent encodes delimiters like ? and &, which is necessary for query parameter keys and values.

Are my sensitive query parameters sent to any server?

No. The string translation runs 100% inside your browser using standard JavaScript URI functions. We never log or transmit query parameters, API keys, or links.

What is percent-encoding?

Percent-encoding replaces non-ASCII or reserved URI characters with a percent symbol (%) followed by two hexadecimal digits representing the UTF-8 byte (for example, space becomes %20).

Can this tool decode plus signs (+) as spaces?

Yes. When in decode mode, query parameter style plus signs (+), which represent spaces in application/x-www-form-urlencoded forms, are parsed cleanly.

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