URL Encoder & Decoder
Encode or decode URLs and URI query parameters online. Safely format special characters, spaces, and reserved symbols client-side with full UTF-8 support.
What is the URL Encoder / Decoder?
The URL Encoder & Decoder transforms special characters and query strings to and from RFC 3986 compliant percent-encoded values.
How to Use the Tool
- Paste or type your URL or query string into the input field.
- Select between Encode and Decode modes.
- Toggle between Full URL (encodeURI) and Component/Parameter (encodeURIComponent) modes.
- Copy the converted output string instantly.
Common Use Cases
- Sanitizing query parameters before passing them into REST API endpoints.
- Decoding messy query strings and tracking parameters in redirect links.
- Escaping special symbols in OAuth callback redirect URIs.
Supported Formats & Options
Supports standard RFC 3986 percent-encoding, full UTF-8 character conversion, component vs full URL modes, and space-as-plus (+) toggling.
Related Guides & Tutorials
Understand the differences between encodeURI and encodeURIComponent in JavaScript, their use cases, and common bugs when handling URLs.
Learn how percent encoding (URL encoding) works, why it is necessary for query parameters, and how to encode and decode strings securely client-side.
A complete developer guide to URL encoding. Learn how percent-encoding works, differences between encodeURI and encodeURIComponent, and UTF-8 handling.
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Frequently Asked Questions
What is the difference between encodeURI and encodeURIComponent?
encodeURI preserves full URL structures (like protocol, slashes, and question marks), while encodeURIComponent escapes all reserved characters, making it ideal for query string parameters.
Is my URL data private?
Yes. All percent-encoding and decoding is processed directly inside your browser without logging or transmission.