B&W

PDF Black & White Converter

Choose a PDF, set the threshold while watching the live preview of the first selected page, and download a true black-and-white copy. Every converted page uses the same threshold.

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1. PDF & options

Local conversion

Pages
Pages are rasterised. Converted pages become images: the visible layout is kept, but selectable text, links, form fields and vector graphics stop working on those pages, and faint detail lighter than the threshold may disappear. Pages you do not select are copied unchanged.

2. Result

PDF
Choose a PDF to begin.

Everything happens in this browser tab. Password-protected or restricted PDFs are refused.

About this tool

About PDF Black & White Converter

PDF Black & White Converter turns all or selected PDF pages into pure black and white. You choose a threshold from 0 to 255 while watching a live preview of the first selected page; the same threshold is then applied to every converted page, and the result is rebuilt as a PDF with the original page order and size.

True black-and-white pages print crisply on any printer, can make scanned documents easier to read and suit forms or portals that require monochrome documents.

How to use

Step by step

  1. Choose a PDF file.
  2. Choose all pages or the pages to convert.
  3. Adjust the threshold while watching the preview.
  4. Pick Standard or High quality.
  5. Press Convert and download the black-and-white PDF.
Key features

What it offers

  • Threshold slider and number input from 0 to 255
  • Live preview of the first selected page
  • Same threshold applied consistently to every page
  • Only pure black and pure white pixels in converted pages
  • Page order and size preserved; unselected pages unchanged
  • Progress shown page by page
Best practices

Tips for best results

  • Raise the threshold if light text disappears; lower it if the page looks too dark.
  • Use High quality for small text.
  • Check the preview on a page with your faintest details.
  • Keep the original file, as converted pages lose selectable text.
Benefits

Why people use it

Crisp output

Pure black on white.

You control it

Live threshold preview.

Consistent

One threshold for all pages.

Private

Converted in your browser.

FAQ

Common questions

Each pixel’s brightness is measured from 0 (black) to 255 (white). Pixels darker than the threshold become black and all others become white. Raise it to darken the page; lower it to keep only the darkest marks.
Yes. The preview and every output page use the same brightness formula and the same threshold. The preview is simply drawn at a lower resolution.
True black and white has no grey. Light lines, pale highlights or faint scans that are lighter than the threshold become white. Try a higher threshold if details are lost.
Not on converted pages. They become images, so selectable text, links, forms and vector graphics stop working there. Unselected pages are copied unchanged.
Yes. The output has the same pages in the same order, and each converted page has the same visible size as the original.
Standard (150 DPI) is fine for reading and most printing. High (300 DPI) keeps small text crisper in black and white but makes a larger file.
No. The PDF is opened and processed entirely in your browser. Nothing is uploaded, stored or sent, and Reset clears it from the page.

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Private by design

This runs entirely in your browser

No file or text you enter here is uploaded. Encoding and decoding happen on your device using native browser APIs — close the tab and nothing remains on a server.

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