PDF to Grayscale

Drag it into the drop zone or click Select PDF File. Thumbnails of every page appear.

All pages are selected by default — use Select None and click thumbnails to convert only some, or keep them all.

Drag the Grayscale Intensity slider (100% for full black and white), and toggle Flatten Transparency and Compress Output as needed. Hover the preview to compare with the original.

Click Download Grayscale PDF; a progress bar tracks each page, then the file saves.

Upload the PDF, leave all pages selected (or choose specific ones), set the Grayscale Intensity to 100% for full black and white, and click Download Grayscale PDF. The preview shows the result, and you can hover it to compare with the original. Everything runs in your browser, with no upload.

Yes. A grayscale PDF prints using only black toner, so you avoid spending colour ink — and you sidestep "composite black," where some printers mix cyan, magenta, and yellow to make dark tones. For long documents you don't need in colour, converting first is an easy way to cut printing costs.

Often, yes. Removing colour data from images and graphics can noticeably shrink a PDF, sometimes substantially, which helps with email limits and uploads. Keep Compress Output on to reduce it further. If you need it smaller still, run the result through Compress PDF.

Yes. By default all pages are selected, but you can click Select None and then choose just the pages you want converted — handy when a cover or a chart should stay in colour while the rest goes black and white. The unselected pages are left unchanged.

It controls how strong the effect is. At 100% you get full black and white; lower values keep a hint of the original colour for a softer, partly-desaturated look. The conversion uses a luminance calculation, so light and dark colours keep their relative brightness rather than blending into a flat gray.

The tool renders pages at a high resolution so text and lines stay crisp, including when you zoom or print. The trade-off is that each page becomes an image to apply the grayscale — so it looks sharp, but it's no longer live text (see the selectable-text question below).

Flatten Transparency merges layered or transparent elements into a single layer for cleaner, more predictable rendering. Compress Output (on by default) reduces the size of the converted file. Leave both as suggested for most documents; turn Compress off only if you want maximum image fidelity.

No. The conversion runs entirely in your browser, so your PDF never leaves your device or reaches a server. That matters for statements, contracts, and personal documents. Closing the tab clears the file from memory.

Yes. The tool works in any modern browser on iPhone or Android — no app needed. Upload, adjust the intensity, and download. On mobile, a long-press on the preview reveals the original for comparison. Large documents process faster on a laptop.

Yes. Converting is free, the PDF has no watermark, and there's no account to create. Upload, set the intensity, and download a clean grayscale PDF — no paywall before the download.

No. To apply grayscale, each page is rendered as a high-resolution image, so the converted pages are pictures — the text can't be selected, searched, or copied afterward. If you need to keep selectable text, do that work first (or use Extract Text from PDF) and grayscale only for printing or archiving.

Mainly to save money and space: black-and-white printing uses cheaper black toner, and dropping colour data can shrink the file. It also gives a consistent, professional monochrome look for documents where colour isn't needed — reports, contracts, study material — and meets submission rules that ask for black-and-white files.