Number Base Converter
Convert whole integers between binary, octal, decimal, hexadecimal and bases 2–36.
Free · No signup · No watermark · On-device processing
Use the tool
How to use Number Base Converter
- Enter integer digits without a 0x or 0b prefix.
- Set input and output bases between 2 and 36.
- Convert and copy the exact integer representation.
How this tool handles your input
BigInt arithmetic preserves large integer digits. Enter the digits without 0x or 0b prefixes and choose both bases. Negative integers are supported.
Fractions and scientific notation are not accepted. Input has a 5,000-digit technical budget.
Example: FF in base 16 → 255 in base 10
Privacy and browser support
Your input is handled in this browser tab. Selected files and entered text are not sent to Varento Tools by this tool. Some specialized libraries load only when needed. A browser with JavaScript and sufficient device memory is required. Read our local-processing explanation.
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Frequently asked questions
Is this tool free without daily usage limits?
Yes. Varento Tools has no signup, accounts, usage-count caps, paywalls or watermarks. Device memory, format support and browser restrictions can still limit technically demanding files.
What input and output rules apply?
BigInt arithmetic preserves large integer digits. Enter the digits without 0x or 0b prefixes and choose both bases. Negative integers are supported.
What are the limitations?
Fractions and scientific notation are not accepted. Input has a 5,000-digit technical budget.
Is my input uploaded?
No. This tool processes your input in the current browser tab, without a processing API or account.