OCR Quality Checker
Measure text coverage after OCR.
Check how much of a (searchable) PDF actually has extractable text: pages with text, pages without, and total word count — a useful sanity check after OCR.
Your files are processed locally in your browser. Nothing is uploaded to a server, ever.
Tip
Drop your file here or click to browse. Everything is processed on this device — nothing is uploaded.
Quick answers
- What does this tool do?
- Measure text coverage after OCR. Check how much of a (searchable) PDF actually has extractable text: pages with text, pages without, and total word count — a useful sanity check after OCR..
- Is it free?
- Yes — free and unlimited, with no account required and no watermark on the result.
- What files are supported?
- PDF files, up to 100 MB each.
- Where is my file processed?
- Entirely in your browser. Your file never leaves your device — nothing is uploaded to a server.
- What are the limitations?
- Measures text presence only — it cannot compare recognized text against the original content.
- What happens if processing fails?
- You get a clear message explaining what went wrong and how to fix it (try another file, check the format, or start over). Your original file is never touched.
How to OCR Quality Checker
- Upload the OCR’d PDF.
- Click "Process" — the text layer is measured per page.
- Download the coverage report.
- Re-run OCR on any pages flagged as empty.
Frequently asked questions
Common problems and fixes
- Extracted text is gibberish
Why: the pages are scans — the file has no text layer, so there is nothing real to extract.
Fix: run the OCR PDF tool first, then extract the newly searchable text.
- Table rows merge into one line
Why: detection is position-based, and dense or merged-cell layouts confuse simple row grouping.
Fix: crop the page to the table region first, then extract — or export as XLSX and fix merges in your spreadsheet app.
- Images come out lower quality than the PDF
Why: extraction saves each embedded image at the resolution it was stored at — some PDFs are created with downsampled images.
Fix: check the source quality first; extraction cannot invent resolution that was never embedded.
Who uses OCR Quality Checker?
- Analysts and accountants — pulling tables out of statements and reports straight into a spreadsheet.
- Writers and designers — reusing figures, charts and logos from existing documents.
- Search and AI pipelines — getting plain text out of PDFs for indexing or language-model input.