Developer
Number base converter
Convert between binary, octal, decimal and hex.
Binary
11111111Octal
377Decimal
255Hex
ffHow it works
Three simple steps — all in your browser.
1
Open it in your browser
Number base converter runs entirely on your device — no upload, no account, and nothing to install.
2
Do the work
Convert between binary, octal, decimal and hex. Everything happens instantly as you go.
3
Save your result
Download or copy the output straight away. Your data never leaves your device.
Why use Number base converter
Completely private
Number base converter works locally in your browser — your files and text are never sent to a server.
Free, with no account
No sign-up, no trial, and no usage limits. Open the tool and start straight away.
Works on any device
Runs in any modern browser on desktop, tablet or phone — nothing to download.
Frequent questions
Is Number base converter free to use?
Yes — every tool here is completely free, with no account, sign-up, or usage limits.
Is anything uploaded to a server?
No. Number base converter runs entirely in your browser, so your data never leaves your device.
Do I need to install anything?
No. It works in any modern browser on desktop or mobile — there is nothing to download or install.
Does it work offline?
Once the page has loaded, the processing happens locally, so it keeps working even on a flaky connection.
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