convert

Text to Hex

Convert text into hexadecimal bytes (UTF-8), with your choice of separator, prefix and letter case.

Runs on your deviceBatch readyPaste textNew

Paste or drop

Paste text below, or drop a file instead.

0 chars · 0 lines
…or drop a file
Drag and drop, or choose files
TXTMDCSVTSVLOGJSONXML+10

Choose an output

Convert text into hexadecimal bytes (UTF-8), with your choice of separator, prefix and letter case.

Fine-tune

Optional — sensible defaults are already set.

Separate bytes with
Byte prefix

About Text to Hex

Convert text into hexadecimal bytes, using two hex digits per UTF-8 byte, so 'Hi' becomes 48 69. You choose the separator, an optional 0x or \x prefix, and uppercase or lowercase letters to match the format your code, documentation or tool expects.

When it helps

  • Writing string literals as escaped bytes for C, Python or shell scripts using the \x prefix.
  • Building byte arrays for code with the 0x prefix and comma separator.
  • Comparing a string's bytes with what a hex editor or packet capture shows.
  • Spotting hidden characters, such as a non-breaking space (c2 a0), that look the same as normal ones.

Tips

  • Pick '\x' with no separator to get a string like \x48\x69 you can paste straight into most programming languages.
  • Pick '0x' with a comma separator for array syntax, then wrap the result in braces or brackets.
  • Colon-separated output matches the style used for MAC addresses and many certificate fingerprints.
  • Each byte is shown separately, so a non-ASCII character shows as several hex pairs rather than one Unicode code point.

Good to know

Quick answers about text to hex in your browser.

Only for ASCII characters. 'é' is code point U+00E9 but is stored in UTF-8 as the two bytes c3 a9, and this tool shows the bytes. Most programs and file formats work with the bytes.

Hexadecimal is base 16, using digits 0-9 and letters a-f. One hex digit represents exactly 4 bits, so every byte fits in exactly two digits, which is shorter and easier to read than eight binary digits.

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.

Related tools

DEVURL EncodePercent-encode the contents of a text file for safe URLs.TXTNewWord CounterCount words, characters, sentences and paragraphs, and estimate reading and speaking time, with a top-words list.TXTNewWord Frequency CounterList every word in your text with how often it appears, ranked and exported as a CSV spreadsheet.TXTNewCase ConverterConvert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case and more.TXTNewFind and ReplaceFind and replace words or patterns in text, with optional regular expressions, case matching and whole-word search.TXTNewText Compare (Diff)Compare two texts line by line and get a unified diff showing exactly what was added, removed or changed.TXTNewReverse TextReverse text backwards character by character, flip the order of lines or words, or mirror each line.TXTNewFancy Text GeneratorTurn plain text into bold, italic, script, gothic, bubble, small caps or upside-down Unicode text you can paste anywhere.TXTNewRemove AccentsStrip accents and diacritics from text (é → e, ñ → n, ü → u) and optionally expand ligatures like ß and æ.

Part of the Text Tools collection.