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ASCII to Hex – Free Online Text to Hexadecimal Converter

Easily translate plain text into hexadecimal notation with this free online ASCII to Hex converter. Each character is transformed into its 2-digit hex equivalent, making it invaluable for debugging code, binary analysis, and understanding data encoding. Fast, secure, and runs entirely in your browser — your data remains private and never leaves your computer.

Conversion Direction

How to Use the ASCII ↔ Hexadecimal Converter

Operation options:

  • ASCII → Hexadecimal: Enter plain text. Each character is converted to its 2-digit hex representation (uppercase), separated by spaces.
  • Hexadecimal → ASCII: Enter hexadecimal values (pairs of 0–9 and A–F digits, case-insensitive, separated by spaces or continuous). Each 2-digit hex byte is converted to its ASCII character.

How to use:

  1. Paste or type your input (plain text or hex code) into the Input area.
  2. Select the conversion direction: ASCII → Hexadecimal or Hexadecimal → ASCII.
  3. The result appears instantly in the Output area. Use Copy to copy your result, or Clear to reset.

Tips:

For Hexadecimal → ASCII:

  • You can input hex bytes as a continuous string (e.g. 48656C6C6F) or separated by spaces (48 65 6C 6C 6F).
  • Invalid or incomplete hex pairs are flagged with an error message. Only valid 2-digit sequences produce characters.

For ASCII → Hexadecimal:

  • Every character in your text is mapped to its standard ASCII code, then rendered as a 2-digit hex value.
  • Output uses uppercase hex (A–F) and inserts spaces between bytes for easy copying into code, scripts, or documentation.