Convert a scan to black and white
Push a color or grayscale scan to crisp, high-contrast black & white — sharper text, smaller files, all processed locally in your browser.
Upload Document Images
Drag & drop files here, click to browse, or use your camera. Supports multiple files — JPG, PNG, WEBP, HEIC.
100%
Processed in-browser
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Adjustable corner points
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Average cleanup time
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Files ever uploaded
How to convert a scan to black and white
Three steps to a high-contrast, document-ready page.
Add your scan or photo
Drop in a PDF or photo of the document you want converted to black and white.
Switch color mode
Select black & white from the color options. The tool thresholds every pixel to pure black or pure white for maximum contrast.
Download the result
Save the high-contrast PDF, or straighten and crop the page first if the original scan is crooked.
What black & white mode gives you
More than a filter — a proper threshold conversion built for text documents.
True black & white thresholding
Unlike a simple filter, every pixel is pushed to pure black or pure white, maximizing contrast between text and background.
Smaller file sizes
Black & white pages compress far better than color or grayscale scans, which matters when a portal caps upload size.
Sharper text
Removing color and gray shading strips out soft, anti-aliased noise, so printed and handwritten text reads more clearly.
Works across multi-page PDFs
Apply black & white once and it carries across every page you add, keeping a multi-page document consistent.
Combine with corner cropping
Straighten the page and remove the background first, then convert to black & white for a fully cleaned-up result.
Fully client-side conversion
The color conversion happens locally with WebAssembly — your document is never sent to a server.
Built for text, not photos
Color and gray tones on a text page are mostly noise — paper texture, faint stains, uneven lighting. Black & white strips all of it, leaving pure contrast between ink and page.
The standard look for official paperwork
Forms, contracts, and government paperwork are almost always expected in black & white — it's the format that reads as a genuine scan.
Smaller files without extra steps
Because black & white pages compress so efficiently, converting often solves a file-size problem before you even reach for a separate compressor.
When to convert to black and white
Common documents that look and read best in high contrast.
Contracts and legal paperwork
Convert signed contracts to black & white for the clean, professional look expected in legal filing.
Government forms
Many portals expect black & white scans specifically — convert before you upload to avoid a rejected submission.
Old or faded paper scans
Push a faded, yellowed paper scan to black & white to make washed-out text legible again.
Handwritten notes
Convert photographed handwritten pages to black & white so pencil or faint ink reads with more contrast.
Receipts for records
Black & white receipts stay small and legible, which is ideal for long-term expense records.
Faxed or photocopied pages
Documents that started as a fax or photocopy usually already look black & white — converting cleans up any color cast from the scan itself.
More scanning tools
Free, private, and browser-based — just like the converter above.
Loved by renters, bookkeepers & coordinators
Thousands of people clean up a scanned document here every day. Here's what a few of them say.
“My phone scan of a lease was crooked with a shadow across it. Two minutes here and it looked like it came off a real scanner.”
“Switching to black & white made an old faded receipt scan actually readable again — and it never left my laptop.”
“I clean the scan, then compress it to 200KB for the portal. Two tools, zero uploads, done in under a minute.”
Frequently asked questions
What's the difference between black & white and grayscale?
Grayscale keeps a full range of gray tones, which suits photos or documents with shading. Black & white applies a threshold that forces every pixel to pure black or white — best for text pages, since it maximizes contrast and minimizes file size.
Will black & white mode remove shadows or background clutter?
It flattens lighting differences, so mild shadows read as clean white instead of gray. For background clutter around the page itself, pair it with corner cropping to trim the desk or hand out of frame first.
Does converting to black and white reduce image quality?
Text and line detail stay sharp — often sharper, since the threshold removes soft anti-aliased noise. You lose color and fine gray shading, which is the tradeoff for a smaller, cleaner file.
Can I convert a whole multi-page PDF at once?
Yes — apply black & white mode once and it carries across every page you add, so a multi-page scan comes out consistently high-contrast.
Is my document uploaded to convert it?
No. The color conversion runs entirely in your browser using WebAssembly — nothing is sent to a server at any point.
Is this black and white converter free?
Yes, completely free with no signup, no watermark, and no limit on pages or file size.