Developer & Text · URL, HTML & Binary Encoder

URL encode or decode text, plus HTML entities, hex and binary

Quick answer

Open Toolfox → URL, HTML & Binary Encoder, paste your text and choose a conversion: URL or form encode and decode, HTML entities, text to binary or hex and back, or Unicode escapes (\uXXXX). The result updates as you type. It runs entirely on your computer (Mac, Windows or Linux). Files are never uploaded.

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How to do it

  1. Open URL, HTML & Binary Encoder.
  2. Paste or type text, or open a file.
  3. Choose the conversion in Options.
  4. Copy the result or Save… it.

Options you can set

  • Convert
  • Encode
  • Space between bytes

Good to know

  • URL encoding keeps only letters, digits and - _ . ~ unescaped (RFC 3986), so the result is safe in any part of a URL.
  • HTML decoding knows every HTML5 named entity. Unknown entities are left as they are, and you're told where they are.
  • Binary, hex and URL decoding expect UTF-8 text. Bytes that aren't valid UTF-8 are reported instead of being guessed.
  • Unicode escapes use the JavaScript and JSON style: characters outside the Basic Multilingual Plane become a surrogate pair.

URL, HTML & Binary Encoder FAQ

What's the difference between URL encode and form encode?

URL encode (component) keeps only letters, digits and - _ . ~ unescaped (RFC 3986), so the result is safe in any part of a URL. Form encode writes spaces as +, the way HTML forms do.

What happens with invalid input?

Binary, hex and URL decoding expect UTF-8 text, and bytes that aren't valid UTF-8 are reported instead of guessed. Unknown HTML entities are left as they are, and you're told where they are.

Is URL, HTML & Binary Encoder in Toolfox free?

Yes. URL, HTML & Binary Encoder is one of 57 tools in Toolfox, a free app for Mac, Windows and Linux with no account, ads, limits or watermarks.

Does URL, HTML & Binary Encoder upload my files?

No. Toolfox processes files on your own computer and works offline; your files are never uploaded.

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Updated 2026-10-18 · Toolfox v0.2.1