How to remove blank pages from a scanned PDF
Sheet-fed scans almost always include empty pages from blank backs and separator sheets. Here's how to remove them cleanly — in your browser, no upload.
Open the Delete Pages tool →Sheet-fed scans almost always include a few blank pages — the back side of a single-sided original, a separator sheet, an accidental double-feed. They make the file bigger, harder to read, and (if you OCR’d it) noisier. The fix: remove the blank pages, in your browser, with no upload of the scan.
Why blank pages sneak in
- Two-sided scanning of one-sided originals — every “back” comes through as a blank.
- Separator pages — some scanners insert a blank between batches to delimit documents.
- Double-feeds — two sheets pulled through at once produce a phantom blank on the second.
- OCR noise — a “blank” page may have a faint speckle, but it’s effectively blank to a reader.
How to clean it up
Drop the scan in and the tool draws a thumbnail of every page. Blank pages are obvious — they’re solid white tiles in the grid.
- Click a blank page to mark it for deletion. It gets a red border, a “Remove” badge, and the page content dims so you can see at a glance what’s going.
- The counter — “N marked · K pages will remain” — updates live, so you can verify the result before you commit.
- “Clear” unmarks everything if you change your mind.
- The tool refuses to delete every page (a PDF must have at least one); you’ll see an amber notice if you mark them all.
Click “Delete N pages” and the tool builds a new PDF without those pages, in their original order, no quality loss.
Tips
- Skim before you commit. Marking a page is reversible until you hit download. Click again to unmark.
- Pair with Rotate PDF. Sheet-fed scans often arrive with sideways pages too. Fix the rotation first, then delete the blanks — it’s easier to spot blanks when everything’s the right way up.
- Compress after. Deleting blank pages shaves off a couple of megabytes; compressing what’s left often takes the file from 60 MB to under 10 MB.
Why this isn’t just “less data”
A scan with five blank pages out of fifteen is also a scan that:
- Takes longer to email or upload (33% more data).
- Looks unprofessional to anyone who reads it.
- May hit upload caps on government / banking portals.
Cleaning it up is a small investment that pays back every time someone opens the file.
Privacy
Scans of contracts, signed forms, medical records, and IDs are the most sensitive PDFs you handle — and exactly the ones you don’t want uploading to a “free blank-page remover” website. PDF.js renders the previews and pdf-lib performs the removal, both inside your browser. The scan stays on your device.
Step by step
- Open the Delete Pages tool.
- Drop the scanned PDF on the upload area.
- Click each blank page (it turns red and dimmed).
- Confirm the remaining-pages counter shows what you expect.
- Click “Delete N pages” and download the cleaned PDF.
FAQs
- Why does my scanner add blank pages?
- Two common causes — scanning two-sided originals where one side is blank, and scanner-inserted separator pages between documents. Some scanners also misfeed (two sheets pulled through at once) and produce a phantom blank.
- How do I know a page is actually blank and not just very light?
- The thumbnails are rendered from the scan itself, so what you see is what you'll get. If a thumbnail looks blank, the page is effectively blank for any reader. If you're worried about thin handwriting or pencil marks, click into the original viewer to double-check before deleting.
- Can I undo a deletion before downloading?
- Yes — click a marked page again to unmark it (the red border and dimming go away). Use "Clear" to unmark all of them in one go. Nothing is destructive until you click "Delete N pages" and download.
- Can I delete every page?
- No — a PDF needs at least one page. If you mark them all, the download button stays disabled until you keep at least one. If you wanted to break the document into pieces, use the Split PDF tool instead.
- Is my scan uploaded for this?
- No. Previews are rendered by PDF.js in your browser and the removal is done by pdf-lib, locally. Scans of contracts, IDs, and statements should never go to a random "remove blank pages" website.
Related guides
- Compress a scanned PDF Scanned PDFs are usually mostly image — and image PDFs shrink dramatically. Here's how to compress a scanned PDF in your browser without sacrificing legibility.
- Fix a sideways scan Scanners flip pages all the time. Here's how to rotate scanned PDF pages — one page or all of them — right-side-up, in your browser.
- Extract pages from a PDF Sometimes you only need a few pages from a long PDF — a single contract clause, two pages from a long report. Here's how to pull them out, in your browser.