PDF Scan Quality Checker
Review a scanned PDF for possible blank pages, blur, low contrast, dark/light pages and skew warnings before sending or submitting it.
Choose a scanned PDF
| Page | Brightness | Contrast | Sharpness | Ink | Possible skew | Status |
|---|
Find pages that may need rescanning
FileFit renders each page at a consistent browser resolution and calculates visual signals. It can highlight pages that look unusually blank, dark, light, low-contrast, soft or possibly skewed.
FAQ
Does the tool OCR my document?
No. It analyzes page appearance, not the meaning of the text.
What does possible skew mean?
The browser sees a pattern consistent with slightly tilted horizontal content. Complex layouts can produce false warnings, so the result is shown only as a review suggestion.
Are my scans uploaded?
No upload server is used by this checker. The PDF renderer runs in your browser.
Continue with a related check
More questions about this tool
If a page says LOOKS OK, is it guaranteed readable?
No. Automated appearance checks cannot determine whether a crucial stamp, signature or word is legible.
Can this automatically rotate my PDF?
No. It only reports possible problems; use a PDF rotation tool after checking the original orientation.
Does this send the scan to a server?
The PDF is rendered and analyzed locally in your browser in this version.
How to interpret page-by-page scan warnings
A PDF can open successfully while containing a nearly blank scan, an overly dark page or a blurred signature. This checker analyzes rendered page appearance and highlights pages that may deserve another look before submission.
Visual metrics are screening signals, not document understanding. A clean page with very little text might trigger a blank-page warning, and a photograph may trigger skew detection even when it is intentionally angled.
Step-by-step workflow
- Use an original scanned PDF if available. Open the file and choose Conservative when you want fewer warnings or Balanced for a wider review.
- Click Analyze Scan Quality. Read the overall summary, then inspect the thumbnail and numeric metrics for each flagged page.
- Compare any flagged page with the original paper or source image. If text cannot be read at a normal zoom level, rescan with stable lighting and a flat page.
- Download the optional CSV report if you need to track which pages to rescan, then review the corrected PDF again.
Common problems and what to check
| What you notice | What to check |
|---|---|
| Page reported blank-like | Check for a genuinely empty or extremely faint scan before removing anything. |
| Possible skew warning | Look for tilted text baselines. The result is only a visual hint and may be triggered by complex layouts. |
| Very light or low contrast | Verify that faint signatures, stamps and small print remain visible; rescan if important detail is lost. |
Important limitation
This tool does not run OCR, validate the words in the document or make a legal determination about scan acceptability. The metrics depend on browser rendering and are not printer or scanner calibration measurements.