Online Tool Store
HEX to Octal
Enter a hexadecimal number and get its octal (base-8) equivalent instantly. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Octal
Example shown — replace it with your own hex number.
How it works
- Enter a hexadecimal (base-16) number.
- The value is parsed and converted to base-8.
- Read the octal result instantly.
Conversion uses parseInt(value, 16) to interpret the
digits as base-16, then toString(8) to represent that
number in base-8 — the standard number-base conversion used across
programming and digital electronics.
FAQ
Is my data uploaded anywhere?
No. Conversion happens entirely in your browser — nothing is sent to a server.
Can I convert more than one number at a time?
Yes — paste multiple hex numbers separated by spaces, commas, or newlines and each converts independently.
Does it matter if I use uppercase or lowercase hex digits?
No — both A-F and a-f are accepted and parsed the same way.
Can I go from octal back to hex?
Yes — see the companion Octal to HEX tool for the reverse conversion.
How we compare
| Feature | Online Tool Store | Scientific calculator | Python one-liner |
|---|---|---|---|
| No mode-switching needed | ✓ | Requires switching base modes | ✓ |
| Free, no setup | ✓ | ✓ | Requires Python installed |
A scientific calculator works but needs switching base modes twice. HEX to Octal converts instantly with no mode-switching.