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Binary, Octal, Decimal and Hex Integer Converter
Convert whole numbers between base 2, 8, 10 and 16. Check a hex value in decimal or convert a long integer without losing precision.
Input and settings
LOCAL255
Getting started
Enter an integer and choose source and destination bases.
Before you use the result
Fractional values are excluded; very long values are capped for readability.
Try an example
Convert FF from base 16 to 255 in base 10.
How it works
BigInt preserves exact values beyond JavaScript Number precision.
Frequently asked questions
Convert exact integers between binary, octal, decimal and hexadecimal.
How do I use Number Base Converter?
Enter an integer and choose source and destination bases.
Does this tool upload my data?
Inputs and files are processed in your browser. Page-view analytics do not contain your tool input.
What should I check before using the result?
Fractional values are excluded; very long values are capped for readability.