How it works
The input is parsed as a non-negative integer in the selected source base. Large values beyond JavaScript safe integer precision should be checked separately.
parseInt(input, fromBase).toString(toBase).
Debugging scenario
Convert a small known integer such as 255 across binary, octal, decimal and hexadecimal, then use the same field width and signedness as the protocol or file format. Preserve leading zeros separately when they represent a fixed-width identifier rather than a mathematical integer.
How to interpret the result
The tool accepts non-negative integers in bases 2, 8, 10 and 16 within JavaScript safe-integer precision. Output is a mathematical representation without sign extension, two-complement interpretation, byte order, separators or fixed-width padding.
Input reference
- Value
- Example default: Sample input included
- From base
- Example default: Decimal (10)
- To base
- Example default: Hexadecimal (16)
Common mistakes
- Pasting secrets, credentials, customer records or other production data into a browser tool or shareable URL.
- Converting a protocol identifier as a number and accidentally dropping leading zeros or signedness.
- Treating a convenient preview as validation by the target runtime, parser, database or security control.
Before using the result
- Reduce the input to a synthetic example that still reproduces the behavior.
- Confirm width, signedness, byte order and safe-integer range against the target field definition.
- Add the accepted input and expected output to the project regression tests before release.
Questions to check before production use
Are fractional numbers supported?
No. This tool is for integer base conversion.
Can it handle very large integers?
JavaScript safe integer limits apply; verify large identifiers with a BigInt-aware tool.
Independent developer utility. Review output before using it in production.