Tools/URL Encoder / Decoder
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URL Encoder / Decoder

Instantly encode special characters for URL parameters or decode them back.

Input (Text)
Output (Encoded URL)

About URL Encoder / Decoder

Instantly encode special characters for URL parameters or decode percent-encoded URLs back to readable text. URL encoding (percent-encoding) is essential for safely passing data in query strings, form submissions, and API requests. The bidirectional tool lets you easily switch between encoding and decoding modes.

How to use this tool:

  1. Enter text in the input panel to encode or decode.
  2. Click the mode button (Encode/Decode) to convert.
  3. Use the swap button to switch between encoding and decoding modes.
  4. Click "Copy" to copy the output to your clipboard.

Frequently Asked Questions

What characters get encoded?

Special characters like spaces, &, =, ?, #, /, and non-ASCII characters are converted to percent-encoded format (e.g., space becomes %20).

What is the difference between encodeURI and encodeURIComponent?

This tool uses encodeURIComponent which encodes all special characters. encodeURI preserves URL-safe characters like : / ? # which is less thorough.

When should I URL-encode data?

Always encode data that will be used in URL query parameters, form field values, and any user-generated content in URLs.

🔒 Are my files uploaded to a server?

No. MyConverterPro processes all files locally inside your browser using client-side JavaScript. Your data never leaves your device, ensuring 100% privacy and security.

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In-Depth Guide

URL Encoder and Decoder: Handle Special Characters Safely

Encode special characters for URL parameters and decode messy percent-encoded URLs back to readable text — using standard encodeURIComponent behavior.

MyConverter Pro Team4 min readURL, Encoding, Decoding

✓Key Takeaways

  • Encode special characters for safe inclusion in URL query parameters
  • Decode percent-encoded URLs back to human-readable text
  • Uses standard encodeURIComponent/decodeURIComponent behavior
  • Handles Unicode characters, spaces, ampersands, and all reserved characters

URLs can only contain a limited set of ASCII characters. Spaces, ampersands, question marks, hash symbols, and non-ASCII characters (like accented letters or CJK characters) must be percent-encoded before they can be safely included in a URL. For example, a space becomes "%20", an ampersand becomes "%26", and the Japanese character "日" becomes "%E6%97%A5". Without proper encoding, these characters would break URL parsing, corrupt query parameters, or cause server errors.

Our URL Encoder and Decoder handles both directions of this transformation. In encode mode, paste any text and get the properly percent-encoded version ready for inclusion in URL parameters. In decode mode, paste a messy, percent-encoded URL and get the human-readable original text back. The tool uses the standard JavaScript encodeURIComponent and decodeURIComponent functions, ensuring the behavior matches exactly what happens in your JavaScript application code.

URL encoding is essential for building API requests with dynamic parameters, constructing tracking links with UTM parameters, embedding user-generated content in URLs, debugging URLs found in server logs or analytics platforms, and working with any system that passes data through URL query strings. Without proper encoding, special characters in parameter values can collide with URL syntax characters, causing parameter boundaries to shift, values to be truncated, and requests to fail.

The decoder is equally useful for making sense of URLs that have been encoded multiple times. Analytics logs, redirect chains, and ad tracking systems often produce deeply encoded URLs that are virtually unreadable. Our decoder transforms these back to human-readable text, making it easy to understand what data is being passed through the URL.

Continue reading the complete 4 min guide…

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Frequently Asked Questions

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