Fade colored pen marks and reprint a cleaner worksheet
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Add
On a computer, drag images or PDFs here, or paste a screenshot (Ctrl / ⌘ + V).
Adjust
EffectWhitens the paper background; dark print stays dark.
Removes the color and adds a little contrast.
Keeps the original colors, with no tone change.
Pushes ink to black and paper to white; some gray can remain.
Evens out shadows and uneven light; keeps colored ink and stamps.
Fades blue, red and green ink; cannot reliably remove black handwriting.
Warm gray paper, fine grain and a slight tilt; colored ink turns gray.
Export
Export optionsA4 · Single · No limit
ID card: places the first two pages as front & back at ID-1 size on one A4 sheet. Use Edit to crop or align the four corners.
PNG is lossless, so target sizes do not apply.
Uses original photos. Larger files and slower export. Available with No limit or PNG.
Optional. Keeps the image ratio and never exceeds the page.
Photograph a worksheet with blue or red pen answers. LensUp moves colored ink toward white while trying to preserve dark printed questions, so you can print a cleaner copy and redo it. Results depend on ink color, lighting and image quality; black ballpoint on black print cannot be separated reliably.
How to use
- Photograph the worksheet with the handwriting.
- “Fade colored ink” is preselected: it fades blue, red and green pen toward white and keeps dark print. Picking another chip turns it off; pick “Fade colored ink” again to get it back.
- Export or print the cleaner copy.
What the eraser actually removes
The tool targets colored ink — blue and red ballpoint, marker and highlighter strokes — and separates it from black printed text by color. That makes the sweet spot obvious: a printed worksheet, form or exam paper that someone has filled in with a colored pen comes out clean, with the printed template intact.
The honest limits follow from the same mechanism. Graphite pencil and black gel ink occupy the same color space as the printed text, so they cannot be separated safely; an answer written in black stays. Handwriting that crosses printed characters leaves the printed stroke slightly thinner where they overlapped. The tool is a color filter, not an inpainting model — it does not invent what was under the ink.
The jobs it is built for
The recurring case is reuse: a child’s completed workbook page, a practice test marked in red, a form filled out as a sample — erase the colored answers, export a clean copy, print it again. Teachers restore blank worksheets from a filled specimen; students reset practice papers for a second pass; offices recover a reusable template from the one copy someone wrote on.
It also tidies scans for filing. Margin notes in blue, underlining and highlighter wash out, leaving the printed document as issued — often the version a records system actually wants.
Getting a clean result
Erasure quality is mostly photo quality. Even light matters more than resolution: a shadow across the page darkens colored strokes toward black, and the filter then has to choose between leaving ink and thinning text. Photograph the page flat, under even light, and the separation is dramatically cleaner.
After erasing, zoom in on the densest printed area and check that characters kept their weight, then export. If a faint tint remains where a highlighter was, the black-and-white scan filter usually removes the last of it.
When erasing is the wrong tool
Erasing ink is a visual edit, not redaction. It is built to recover a reusable blank page, not to hide information: compression artifacts can retain traces of removed strokes, and a determined reader with the original photo has the original photo. Never use it to remove a signature, a grade, an amount or anything else that must be genuinely unrecoverable — and altering a document to misrepresent it as authentic is prohibited use, full stop.
For legitimate privacy needs, cover the sensitive region completely before sharing, or share only the crop that excludes it. An eraser makes paper reusable; it does not make information gone.
FAQ
Can I fade pen writing on homework?
Usually, for blue or red pen. LensUp moves the ink toward white and tries to preserve dark print; the result depends on pen color, lighting and image quality.
Does it remove black ballpoint pen?
Black pen and black print are the same color, so a color-based eraser cannot fully separate them — blue/red pen works best.
Is my worksheet uploaded?
No — the whole thing runs in your browser.
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