Hex ↔ ASCII Converter
Convert between hexadecimal bytes and ASCII text. Supports custom delimiters and real-time bidirectional conversion. Code never leaves your device — formatting and validation run locally in your browser.
How to Use the Hex ↔ ASCII Converter
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Frequently Asked Questions
What's the difference between hex and ASCII?
Hex is a base-16 representation of binary data (0-9, A-F). ASCII maps byte values to human-readable characters (letters, digits, symbols). The converter translates between the two representations.
What delimiters are supported?
Space-separated (48 65 6C 6C 6F), colon-separated (48:65:6C:6C:6F), no delimiter (48656C6C6F), and comma-separated. Choose the format that matches your input.
Can I convert in both directions?
Yes. Paste hex to get ASCII, or paste ASCII text to get its hex representation. The conversion updates in real time as you type.
What happens with non-printable bytes?
Bytes that don't correspond to printable ASCII characters are shown as dots (.) in the ASCII output. This helps identify binary data embedded in hex strings.
When using Hex ↔ ASCII Converter, is my data uploaded?
No. All conversion happens in your browser using simple byte manipulation. No data is transmitted to any server.
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Last updated October 2026