Encoding tool

URL Encoder/Decoder

Encode and decode URL components, query values and callback parameters while debugging browser and API requests.

Tool Workspace

Processing is intended to run locally in your browser whenever possible. Avoid pasting production secrets, access tokens, private keys or sensitive business data into any online tool unless you fully understand the risk.

Ready. Processing runs in your browser.

URL Component

Encoded Value

Core Features

Encode unsafe URL characters.
Decode query strings and copied URL parts.
Highlight differences between spaces and plus signs.
Support query debugging workflows.

How to Use

Paste a query value, path segment or full copied fragment.
Encode before inserting user-controlled values into URLs.
Decode when inspecting a copied request from DevTools.
Check whether the value belongs in a path, query string or form body.

Common Errors

Using encodeURI when encodeURIComponent is needed.
Treating plus signs and spaces as identical everywhere.
Double-encoding percent signs.
Forgetting to encode non-English characters.

Real Developer Use Cases

Debugging broken query parameters.
Preparing callback URLs for OAuth tests.
Checking encoded search values from browser requests.

Technical Explanation

URL encoding protects reserved characters so they can safely travel inside a URL. Developers often run into bugs when values include spaces, ampersands, equals signs, percent characters or non-English text. The right encoding function depends on whether the value is a whole URL, a path segment or an individual query parameter.