ShadowToolkit

URL Encoder & Decoder

Encode and decode URLs and query parameters.

100% In-Browser
100% In-Browser PrivacyLocal

Your files and data are processed locally and never leave your device.

Input Text
Result (ENCODE)

What is URL Encoder & Decoder?

URL Encoder & Decoder converts strings containing special characters, spaces, and non-ASCII glyphs into standard percent-encoded URI strings (RFC 3986) and decodes them back to human-readable text. It supports both standard encodeURIComponent and encodeURI modes.

Zero-Server Client-Side Guarantee

Unlike legacy online utilities that upload sensitive media and documents to remote cloud storage, Shadow Toolkit executes this entire operation directly within your browser's local runtime. Your raw data never crosses the network.

Key Capabilities

  • Converts special characters to standard percent-encoding (%20, %26, %3D, etc.)
  • Bidirectional URL encoding and decoding with real-time updates
  • Supports both Component mode (encodes all delimiters) and Full URL mode
  • Preserves UTF-8 multi-byte characters and international URLs
  • 100% client-side execution with zero cloud storage

Common Use Cases

1Safely passing complex query parameters, redirect URLs, and search terms in HTTP GET requests
2Decoding garbled query strings from server access logs and analytics referral URLs
3Formatting OAuth state and callback redirect URIs
4Accelerating daily software development workflows, API debugging, and frontend data modeling

How to use URL Encoder & Decoder

01

Select Action

Choose 'Encode' to add percent encoding or 'Decode' to restore readable text.

02

Paste URL or String

Type or paste your URL query string into the box.

03

Copy Encoded String

Click 'Copy' to use the sanitized URL in your application.

04

Integrate with Project

Click 'Copy to Clipboard' or download the file to integrate the verified URL Encoder & Decoder output directly into your application codebase or API client.

Frequently Asked Questions

encodeURI preserves protocol delimiters like '://', '?', '&', and '/' for full URLs, while encodeURIComponent encodes everything, which is necessary for individual query parameter values.

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