Bubble Sheet Marker

Upload the scanned answer sheets and get the marks. Everything is processed on this device — the scans are never uploaded anywhere.

1 Sheet layout

The built-in layout is the 50-question sheet with two versions. If your paper is laid out differently — more questions, more choices, a different ID block — load the template.json you generated with autograder and this tool will use that instead. Page size does not matter: A4 and Letter prints of the same paper are both read correctly, and can even be mixed in one batch.

2 Answer key

Type the answers in order. Spaces, commas and line breaks are all fine. If a question has more than one acceptable answer, put those letters in brackets: A(BC)D. You can also exported from autograder.

3 Scanned sheets

Drop the scanned PDFs here

or choose files — PDF, JPG or PNG, one page per sheet. You can drop many files at once.

Scan in greyscale at 150 dpi or higher. Sideways and upside-down pages are handled automatically. Hundreds of sheets at a time are fine — roughly a minute per 400 pages.