Convert between binary, octal, decimal, hexadecimal, and any base from 2 to 36. Supports arbitrarily large integers via BigInt. Instant, private, no server.
Handles integers of any size using native BigInt. No floating-point precision loss. Convert numbers with hundreds of digits instantly.
Standard bases (binary, octal, decimal, hex) plus any custom base up to 36. Full alphanumeric digit support.
Your numbers never leave your browser. No server, no tracking, no data retention. Works offline once loaded.
Type or paste a number and see all conversions update in real time. Copy any result with one click.