Reference chart
The exact 10×10 letter or mixed chart used for every coordinate.
Hart Chart Worksheet Maker
- 1Write message
- 2Review pack
- 3Print
Print at 100% scale. A one-inch check line is included on every page.
＋ Help improve this worksheet makerWhat should the next pack include?
Feedback will open on the permanent domain. The preview stores and sends nothing.
ONE MESSAGE, ONE MATCHED SET
Three pages that cannot drift apart
Some online encoders output coordinates but leave you to find a separate chart. That is risky because Hart Chart layouts vary. This maker generates the reference, activity and key from one fixed layout.
Learner worksheet
Coordinates, answer spaces, directions and an optional name line.
Answer key
The same coordinate sequence with the decoded characters shown.
Hart Chart worksheet questions
What is a Hart Chart decoding worksheet?
It turns a message into row-and-column coordinates. A learner uses the supplied chart to locate each character and rebuild the message.
Are all Hart Charts the same?
No. Character placement differs between charts, so the generated reference chart must stay with its worksheet and answer key.
Can I include numbers?
Yes. Choose Letters + numbers before building the pack. The mixed chart includes A–Z and 0–9.
Does the message leave my device?
No. The pack is generated locally in your browser. There is no form submission, account or upload service.
Can I print on A4 paper?
Yes. Choose A4 or US Letter. The preview and export use the selected paper proportion.
Is this a vision test?
No. It is a printable activity builder, not a diagnostic or treatment tool.