Flatten or convert a PDF to grayscale on Mac
Make print-ready copies: lock form fields and annotations into the page, or convert to black and white.
Three steps. That's it.
- 1
Drop your files
Drag files onto Grayscale & Flatten PDF, choose them with Choose Files, or right-click them in Finder.
- 2
Choose the options
Set what you need in the options panel, such as flatten, grayscale, or both. Your choices are remembered for next time.
- 3
Get the result
The result lands in a new dated folder in Downloads › OneMacTools. Your originals are never changed.
What Grayscale & Flatten PDF does
Flattening burns form fields, comments and annotations into the page so they can't be edited. Grayscale converts every page to black and white for cheaper printing and keeps the text searchable.
Options
Great for
- Send a filled-in form that can't be changed
- Print in black and white
- Archive a signed document
Questions about Grayscale & Flatten PDF
Does Grayscale & Flatten PDF upload my files?
No. Grayscale & Flatten PDF runs entirely on your Mac, so your files never leave it and it works offline.
Will Grayscale & Flatten PDF change my original files?
No. Results are saved as new files in a dated folder in Downloads › OneMacTools, and your originals are left exactly as they were unless you turn on an option that says otherwise.
What does Grayscale & Flatten PDF need?
Just a Mac with macOS 26 or later. There's nothing else to install.
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Grayscale & Flatten PDF, plus 88 more.
One app. One price.
All 89 tools for $29, once. 14-day money-back guarantee.