Learn Binary – Hex Converter

Learn binary and hex the way that actually sticks — by converting, not cramming
Learn Binary is the binary and hex trainer that drills you on decimal, binary and hex conversion both directions, with a level climb that takes you bit by bit from your first switch to a full byte.

A real learning system, not just a converter:
- The drill — see a number, build the answer on a tappable bit row or a fast keypad, and get an instant verdict plus the place-value breakdown behind it.
- The nibble block — the standout teaching device: see how 0x61 = 0110 0001 = 97, with hex sat over colour-coded 4-bit nibbles. It's the trick that makes hex finally click.
- A level climb — one level per bit, from the first power of two up to the full byte (the 256 Club) and beyond. Each level is a short test you clear at about 80% to unlock the next, so you're always learning at the right difficulty.
- Two's-complement — read and write signed bytes, with a clear sign-bit reveal.
- Bitwise ops — practise AND, OR and XOR, worked one bit-column at a time.
- Byte Speed Run — an optional 60-second timed challenge, unlocked once the byte is mastered (speed comes after accuracy, never before).
- Daily goal + streak — three focused minutes a day, with a streak freeze so a single missed day doesn't reset your progress.
- Explore — drag a slider and watch decimal, binary and hex update together.

Built right:
- Fully offline — no account, no sign-up, no tracking required.
- A clean, friendly light design in apricot and teal.
- Free, with the occasional ad. A single one-time purchase removes the interstitial ads — the only thing we'll ever ask you to buy.

Whether you're a CS or GCSE student, a bootcamp learner, or a developer brushing up on hex and bitwise, Learn Binary turns binary and hex practice into a daily habit.

Recent changes:
- Practice any length — pick a skill and a bit width and drill exactly that, without climbing there first. You asked, it's here.
- 14 new languages — the app now follows your device language, or pick one in Settings.
- Better on tablets and foldables, in any orientation.
- Sharper text and layout throughout.