Clean a double-sided scan
Remove the empty backs of single-sided sheets fed through a duplex scanner.
Remove blank pages from a PDF
Remove blank pages from a PDF: they are detected automatically in your browser and you confirm the selection before downloading.
- Export
Your files are processed locally in your browser and are never sent to our servers.
Blank pages are detected automatically. Click a detected page to keep it.
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Recommended size: up to 100 MB
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How does this tool work?
Removing blank pages from a PDF automatically drops the empty sheets that creep into a document: blank backs of a double-sided scan, separator pages, a page left empty at the end of an export. The tool finds these pages for you, flags them in the thumbnail grid and leaves you the final say before you download the cleaned document. The whole analysis takes place in your browser.
Each page is rendered as a small thumbnail and examined pixel by pixel. A pixel counts as ink as soon as one of its red, green or blue components drops below 245 out of 255. A page with less than 0.15% inked pixels is treated as blank: it gets the Blank page detected badge and appears greyed out.
Detection is deliberately cautious: a page number, a header or one line of text is enough to keep a page. Conversely, a slightly grey background or scan marks can stop an otherwise empty page from being detected. Click any thumbnail to switch its state: keep a detected page, or remove one that was missed.
The pages you keep are copied into a new PDF without any change to their content. The counter shows how many pages will be removed before you download.
How to use this tool
Import the PDF
Thumbnails are generated and analysed; detected blank pages are greyed out and badged.
Check the detection
Click a greyed-out page to keep it, or a normal page to remove it as well.
Download the cleaned document
The resulting PDF contains only the pages you kept.
Use cases
Prepare for printing
Avoid printing empty sheets inserted by layout software.
Before text recognition
Lighten a scan before running OCR, which then has fewer pages to process.
Examples
Double-sided scan of twelve sheets
Backs with no marks at all fall below the 0.15% inked-pixel threshold. A back carrying only a “this page intentionally left blank” stamp would be kept: click it to remove it.
Input
scan.pdf with 24 pages, 5 of which are empty backsResult
5 pages marked Blank page detected; final PDF of 19 pagesTips and best practices
- Scroll through the whole grid before downloading: an almost empty but useful page, such as a lone signature, deserves a check.
- A grey scanner background sometimes prevents detection; remove those pages with a click.
- To remove hand-picked pages without automatic detection, use Remove PDF pages.
Frequently asked questions
How does the tool decide a page is blank?
On a thumbnail of the page, it counts the pixels darker than near-pure white (a component below 245). Below 0.15% inked pixels, the page is flagged as blank.
Will a page with only a page number be removed?
Usually not: a few characters are enough to exceed the threshold. If you want to remove it anyway, click its thumbnail.
Can I adjust the sensitivity?
Not on this page: the threshold is fixed. You still control every page, since one click reverses the tool’s decision.
What if every page is blank?
A PDF must keep at least one page; the download stays disabled until at least one page is kept. Click a thumbnail to keep it.
Are the pages I keep modified?
No. They are copied as they are, with their selectable text and original images.
Are my scans sent away for analysis?
No. Rendering the thumbnails and counting pixels happen in the browser; the document does not leave your device.
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