convert

Text to Binary

Convert text into binary code (UTF-8 bytes as 8-bit groups of 0s and 1s).

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Convert text into binary code (UTF-8 bytes as 8-bit groups of 0s and 1s).

Fine-tune

Optional — sensible defaults are already set.

Separate bytes with

About Text to Binary

Convert text into binary: each character is encoded as UTF-8 bytes, and each byte is written as eight 0s and 1s. Plain English letters take one byte, so 'A' becomes 01000001, while accented letters, other scripts and emoji take two to four bytes each.

When it helps

  • Learning or teaching how computers store text as bytes.
  • Writing secret-looking messages for puzzles, escape rooms or geocaches.
  • Making binary text for designs, T-shirts or social posts.
  • Checking the exact bytes of a string when debugging encoding problems.

Tips

  • Keep the space separator if anyone will decode it by hand, since it shows where each byte starts and ends.
  • Choose 'New line' to put one byte per line, which is easier to annotate in teaching material.
  • Binary is an encoding, not encryption. Anyone can turn it back into text instantly.

Good to know

Quick answers about text to binary in your browser.

UTF-8 uses one byte for basic Latin characters and up to four bytes for others. Most emoji need four bytes, and four bytes of eight bits each makes 32 binary digits.

For the 128 basic ASCII characters (English letters, digits and common punctuation), yes. UTF-8 was designed to match ASCII for those. The difference only shows for characters outside ASCII.

Yes. There is no sign-up, no watermark and no limit on how many files you process.

No. Files are read and processed locally in your browser, so they never leave your device.

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Part of the Text Tools collection.