Clean up a whiteboard photo. Free, in your browser.

A free whiteboard and document photo cleaner that runs in your browser. Drop a phone photo of a whiteboard and it straightens the perspective, removes glare and shadows, and gives you a crisp page with a white background - ready to export as PNG, JPG, or PDF. No signup, no install.

Yes - completely free with no hidden limits, no account required, no watermarks, and no feature gates. Your photos stay on your device.

Drop or choose a photo, or use your camera. Clean Slate finds the board edges, straightens it, and whitens the background automatically. Tap Adjust to fine-tune the corners or cleaning strength, then press Export to save a PNG or JPG, copy it, or combine pages into one PDF.

No. Everything runs locally in your browser using JavaScript. Your photos never leave your device. There are no servers, no uploads, and no tracking beyond basic anonymous page analytics. One caveat worth knowing: building a PDF downloads a PDF-building library from a public CDN the first time you use it, so that CDN sees your IP address the way any website you visit would. Your photos are still never sent anywhere.

It estimates the lighting across the board - the bright glare spots and the dark shadow gradients - and divides them out of the image, so the background becomes evenly white while marker strokes keep their color and contrast. It is the same math behind the classic ImageMagick whiteboard-cleaning technique, running live on your device.

Yes. Anything that should have a light, even background works: printed documents, notebook pages, receipts, flip charts, and sticky notes. Drag the corners in Adjust to crop tight to the page.

Add every photo from your meeting - they line up as pages in the strip at the bottom. Press Export, pick PDF, and all of them combine into one multi-page PDF, in order, with each page cleaned.

Microsoft points people to OneDrive, and text extraction moved into the Microsoft 365 Copilot app. Neither one brings back the dedicated Whiteboard mode Lens was known for - Copilot scans with a single general-purpose mode. Clean Slate is built around that specific job: a phone photo of a whiteboard, straightened, de-glared, and whitened, with no install and no account.

No. Clean Slate is a web page. Open it on a phone, tablet, or computer and it works - no app store, no account, no sign-in, no watermark, and no limit on how many photos you clean.

Microsoft retired Lens in January 2026, so it is no longer an option. CamScanner and the others are mobile apps that need an install, an account, and cloud processing. Clean Slate does the same core job - straighten, de-glare, whiten, export to PNG, JPG, or PDF - free in any browser, on any device, with zero uploads and no watermark.

Yes. Press Text to run character recognition on the cleaned page, then copy the result or save it as a .txt file. It reads printed text well and handwriting less well, so check it before you trust it. The text reader downloads itself the first time you use it, which needs a connection - everything else in the app works offline.

Drag any thumbnail in the strip at the bottom to move it. With a keyboard, focus a thumbnail and press Alt with the left or right arrow key. The PDF follows the order you see.

JPEG, PNG, and WebP. iPhone HEIC files are not readable by browsers - set your iPhone camera to Most Compatible, or share the photo to yourself first, which converts it to JPEG.