Frequently asked questions

Yes. Upload a PDF and each page is handled separately. Pages with handwriting are cleaned; pages with no handwriting at all are left completely untouched — including their original vector text where the PDF has it — instead of being needlessly reprocessed.

Yes. JPG, PNG, and WEBP photos are supported. Phone photos are rotated using their embedded orientation data. Note that tilt and perspective distortion are not corrected — a heavily skewed photo is processed as-is.

The system is built specifically to avoid this. Nothing outside the area you brush is ever touched, and inside it the ink is masked tightly against the local paper rather than blanking a whole block — printed text, equations, diagrams, and tables are protected, and every pixel outside your mark is verified unchanged before you get the file.

Yes — handwritten answers, calculations, checkmarks, circles, and grading marks are the main use case. Brush over them and they go. Where handwriting sits directly on top of printed text, the area it covers is reconstructed from the surrounding background, since the covered printed content is not recoverable from a single image.

Yes, scanned documents are a primary use case, including multi-page scanned PDFs and single scanned images.

No. There is no sign-up, login, or account of any kind. Upload a file and download your result.

PDF, JPG/JPEG, PNG, and WEBP.

Your document is never uploaded. It is read, edited and cleaned entirely inside your browser, so there is no server copy, no database and nothing that could be used to train a model. Closing the tab discards it.

You brush over the handwriting you want removed. Inside that mark, ink pixels are identified against the local paper background, printed content such as question text and diagram lines is detected and protected, and the remaining ink is reconstructed from the surrounding untouched pixels. Everything outside your mark is never modified.

Yes, as a distinct step: native PDF 'Ink' annotations (freehand strokes added in a PDF editor) are removed directly from the PDF's own annotation data before any image processing happens, which is lossless. This is different from handwriting physically scanned or photographed onto a page, which you brush over and which is removed by the masking and reconstruction described above.