FormatDogWorkspace
Strip the color out of scanned documents or photo-heavy PDFs, right in your browser. Works best on scans and image-heavy files — same reasoning as our Compress tool, explained below.
No signup · No file limits · Files never leave your deviceSelect one or more files to convert.
No extra options needed — just start the conversion.
Get your grayscale PDF right away, processed on your own device.
It works best on scanned documents or PDFs full of photos, similar to our Compress tool — grayscale conversion re-processes each page as an image, so it's most effective on already image-based content.
Often yes, since color image data typically compresses smaller once desaturated — but this tool is focused on removing color, not primarily on compression. Use our dedicated Compress tool if file size is your main goal.
No — like Compress, this rebuilds each page as an image, so any selectable or searchable text in the original PDF is not preserved in the output.
No. Conversion happens entirely inside your browser.
Yes, completely free with no daily limit.
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Pinch or use +/− to zoom, two fingers to pan. One finger to drag and redact.
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Drag the corner handles to resize the crop area, or drag the middle to move it.
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Detecting grid lines…
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Click any line of text to retype it. Pinch or use +/− to zoom.
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Highlight/Underline: drag a box over the text. Draw: drag to sketch. Note: tap once to place a comment.