hex

i made this because every hex calculator i found was slow, cumbersome, and filled with ads.

what it does

• converts between hex, decimal, binary, and octal — type in one, the others update live
• programmer's calculator with hex digits, bitwise ops (AND, OR, XOR, NOT, shifts), and full keyboard input
• 8, 16, 32, 64-bit widths · signed or unsigned · accurate to the bit (BigInt internally)
• ASCII preview for bytes, color swatch for 24-bit hex codes
• click-to-copy any value
• no ads, no signup, no tracking. works offline once loaded.

faq

is it free?

yes. no ads, no signup, no tracking. runs entirely in your browser.

how do i convert hex to decimal?

open the converter, type a hex value (like ff); decimal, binary, and octal show up instantly.

does it do bitwise ops?

yes — AND, OR, XOR, NOT, and shifts. results wrap at the chosen bit width.

how big can the numbers go?

up to 2⁶⁴−1 unsigned (or 2⁶³−1 signed). BigInt math, so no precision loss.