Number Base Converter
Convert exact integers between bases 2 through 36.
Text & DataFreeLocalExact integer conversion, including negative and very large integers. Matching 0x/0o/0b prefixes are accepted.
Processed on your device. No upload or account needed.
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Frequently Asked Questions
Do I need to log in or upload my data?
No. Processing runs in your browser; input and files are not sent to a backend. Loading the website and program assets requires a connection.
Which formats and rules are supported?
BigInt avoids precision loss for large integers. Fractions are unsupported; matching 0x, 0b and 0o prefixes are accepted.