Number Base Converter
Convert between binary, octal, decimal and hexadecimal — instant, in your browser.
- No upload
- Browser-based
- Free
- No signup
- Converter
Client-side converters keep your files on your device.
Frequently asked questions
- Which bases are supported?
- Binary (base-2), octal (base-8), decimal (base-10) and hexadecimal (base-16). Type into any field and the others update instantly.
- Can it handle very large numbers?
- Yes — it uses BigInt, so integers of any size work without precision loss.
- Does it work with negative numbers?
- Negative decimals are supported. For binary/hex/octal, the tool converts the absolute value with a leading '-' for negatives.