Number Base Converter
Convert between binary, octal, decimal, and hexadecimal
Supports arbitrary-precision integers via BigInt. Underscores are stripped: 1_000_000 works.
Comment ça marche
- 1Type into any base
Enter a value in binary, octal, decimal, or hex - the others update instantly.
- 2Use underscores freely
1_000_000 or ff_ee_dd are stripped to the raw digits, matching Rust and modern JS syntax.
- 3Prefixes are optional
0b, 0o, and 0x prefixes are recognized but not required.
À propos de Number Base Converter
Free online number base converter. Type a number in binary, octal, decimal, or hex - see all four representations update live. Handles arbitrary-precision integers via BigInt. Runs entirely in your browser. Number Base Converter sur 712 Tools tourne entièrement dans ton browser via des APIs JavaScript natives - aucun server ne voit jamais tes données. Résultats instantanés, privacy complète, et aucune limite d'upload.
Que ce soit pour une session de debug, un sanity check rapide ou un incident en prod, cet outil est gratuit à utiliser autant que tu veux. Pas de watermarks, pas de signup et pas d'ads dans l'outil.
Questions fréquentes
Is there a size limit?
No - BigInt supports arbitrary-precision integers. You can convert a 200-digit hex number just fine.
Does it support negative numbers?
Yes, in decimal. For negative hex/binary, encode with two's complement first - that's a different operation.
What about fractional numbers?
Not yet. This tool is for integers. Floats in binary/hex are a separate topic (IEEE 754).
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