Free printable binary charts and worksheet
Print-ready charts and a worksheet for teaching binary code. Every sheet prints in black and white: a filled square is 1, an empty square is 0.
Binary alphabet chart
1 page
Every letter A–Z in uppercase and lowercase, the digits 0–9 and the space as 8-bit binary, each byte also drawn as eight squares.
ASCII binary chart
1 page
All 95 printable ASCII characters, from the space to the tilde, in decimal, hex and binary on one page.
Binary code worksheet with answers
2 pages
Decode words, write words in binary, add place values and crack a secret message. Page 2 is the answer key.
How to use them in class
- Hand out the binary alphabet chart and have students write their initials in binary. Turning each byte into a row of beads (dark = 1, light = 0) makes a good bracelet project.
- Give the worksheet as practice or homework. It takes about 20 minutes, and page 2 has the answers.
- Let students check their own work, or make new puzzles for each other, with the binary translator.
Free to print and share
Print as many copies as you like for your classroom, club or home. If you share a sheet online, please link to this page so others can find the latest version.