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ConvertBox

URL Encoder/Decoder

Encode or decode URL parameters, query strings, and reserved characters safely for links, APIs, redirects, and web debugging.

How to Use

  1. Choose Encode or Decode mode
  2. Enter URL or text to process
  3. The result appears automatically
  4. Copy the result
  5. Copy the formatted or generated result directly to your clipboard.
  6. Use the result in your application, configuration, or documentation safely.

All processing is done in your browser, and files are never sent to a server.

Frequently Asked Questions

URLs can only contain certain ASCII characters. Special characters, spaces, and non-ASCII characters must be encoded to be transmitted safely.
Characters like spaces, &, =, ?, #, and non-ASCII characters are replaced with percent-encoded equivalents.
No, URL encoding (percent-encoding) is specifically designed for URLs, while Base64 is a general binary-to-text encoding.
No. All operations are processed entirely inside your browser's local sandbox using client-side APIs (like WebAssembly, pdf-lib, or HTML5 Canvas). Your files and data never leave your device.
The tool is completely free with no usage limits. However, since processing occurs in your browser's memory, we recommend keeping file sizes under 50MB (especially for heavy files like PDFs or videos) to ensure stability.
No. All tools on ConvertBox are 100% free. We do not insert watermarks, limit features, or require any registration or payment.
Yes. Once the page and its local library dependencies are loaded in your browser, the conversion logic runs completely offline without needing an active internet connection.

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