Binary Hex Base Converter

Convert any number between binary, octal, decimal and hex — live, as you type. Every base updates at once, with exact integer maths and zero float drift.

Most calculators round, guess the bit width, or hide what's actually happening in the bits. This one doesn't. Type a value in any base and read all four representations side by side in clean, monospaced, grouped digits — plus signed and unsigned interpretation, set-bit counts and the raw bytes, at 8, 16, 32 or 64-bit width.

WHAT YOU GET
- Every base at once: binary, octal, decimal and hex stay in sync as you type
- Any radix from 2 to 36 with a live slider, so odd bases are one tap away
- Bit-level truth: signed two's-complement, unsigned value, set-bit count and big-endian bytes
- Digit grouping toggle and a per-value copy button on every base
- Bitwise Lab with a tappable bit grid — AND, OR, XOR, NOT and shifts, flipped bit by bit
- Developer Reference: full ASCII table, powers of two, common bit masks and a two's-complement explainer
- Saved history you can scroll back through and copy any value from
- Optional daily reminder at 7pm to keep your bit maths sharp

PERFECT FOR
- Developers reading hex dumps, registers and colour values
- Embedded and firmware engineers working close to the metal
- CS and engineering students learning number bases and bit maths
- Anyone who needs an exact, no-nonsense radix converter

WHY NOT JUST USE A CALCULATOR?
A regular calculator drops leading zeros, drifts on large values and shows one base at a time. BaseConvert keeps exact integer maths at a fixed bit width and shows binary, octal, decimal and hex together — so you see the bits, not a rounded guess.

PRIVACY
Everything runs on-device, and it works fully offline. No accounts, no ads, no tracking — your numbers never leave your phone.

FULL ACCESS
The Bitwise Lab, the full Developer Reference and unlimited saved history unlock with Premium — available as a weekly plan, a yearly plan, or a one-time lifetime unlock. Restore Purchases is supported. Convert between the four core bases free, forever.

Type your first value and watch every base light up.

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