How to Clean Up a Scanned PDF (Crop, Rotate, Delete & Compress)
Scanned PDFs often look crooked, dark, or too heavy to upload. Here’s a simple workflow to clean up a scanned PDF using browser-based tools in PDFimageLab.
Common problems with scanned PDFs
After scanning documents, you might see:
- Thick black borders or extra empty margins around the content.
- Pages scanned sideways or completely upside down.
- Duplicate pages, blank pages, or junk pages from the scanner.
- Very large file size that won’t upload to portals or email.
You can fix all of these issues **directly in your browser** without installing any heavy software.
Step 1 — Crop away black borders and margins
Start by removing the extra border around each page:
- Open the Crop PDF tool.
- Upload your scanned PDF.
- Draw the crop box around just the useful content (ignore the black/white border).
- Apply the same crop to all pages if they share the same margins.
- Download the cropped PDF.
This makes the document look cleaner and more professional, and can slightly reduce size as well.
Step 2 — Rotate sideways or upside-down pages
If some scanned pages are sideways:
- Open the Rotate PDF tool.
- Upload the cropped PDF from Step 1.
- Select the pages that are sideways or upside down.
- Use Rotate Left or Rotate Right until they look correct.
- Download the fixed PDF.
Step 3 — Delete blank or junk pages
Scanners often add extra blank pages, test pages, or covers you don’t need:
- Open the Delete pages tool.
- Upload the PDF from Step 2.
- Select unnecessary pages: blank pages, cover sheet, test scans, etc.
- Delete them and download the cleaned-up PDF.
Step 4 — Compress the scanned PDF to reduce size
Scanned PDFs are usually image-based and can be very large. Compress them before uploading:
- Open the Compress PDF tool.
- Upload the cleaned PDF from Step 3.
- Choose a preset such as Balanced or Strong.
- Compress and download the new file.
- Check that the text is still readable. If needed, try a slightly higher quality preset.
This usually brings scanned PDFs under common limits like 1–5 MB for portals and email.
Bonus — Save important pages as images
Sometimes a portal only accepts JPG or PNG files. You can export specific pages from your scanned PDF as images:
- Open PDF → Images.
- Upload your cleaned PDF.
- Export pages as PNG or JPG.
- Upload those images wherever required.
Works on Windows, Mac, Android & iPhone
- Windows & Mac — use Chrome, Edge, Firefox, or Safari.
- Android — open the tools in Chrome.
- iPhone — open the tools in Safari or Chrome.
All tools run inside your browser. Processing is done locally, so your scanned documents stay on your device.