ASCII Decoder Online Free — Convert Codes to Text
Decode ASCII and Unicode character codes to readable text. Decimal or hex input, live output — free, private, no upload.
Decode ASCII online free →
An ASCII decoder turns numeric character codes back into readable text. Log files, protocol dumps, and debug scripts often output decimal (72 101 108) or hex (0x48 0x65) values instead of letters — decoding them manually is slow and error-prone.
How to decode ASCII online
- Paste decimal codes separated by spaces — e.g. 72 101 108 108 111
- Or paste hex codes — e.g. 0x48 0x65 0x6C 0x6C 0x6F
- Text output updates live as you type
- Switch to Char → Code tab to encode text back to numbers
Supported input formats
- Space-separated decimal: 72 101 108 108 111
- Comma-separated decimal: 72,101,108,108,111
- Hex with 0x prefix: 0x48 0x65 0x6C
- Plain hex pairs: 48656c6c6f (via Hex workbench for continuous hex)
When you need ASCII decode
- Reading serial port or socket debug output
- CTF and encoding puzzles
- Verifying charCodeAt() output from JavaScript
- Teaching character encoding basics