Will files be uploaded? Is OCR PDF safe?

OCR PDF runs 100% in your browser via File API; no network upload, memory cleared when you close the tab.

Processing failed or download blocked?

Check page ranges, passwords and file integrity. If the browser blocks multiple downloads, allow automatic downloads or click one by one.

How to chain with other tools?

Chain workflows: organize pages first, then compress/convert for submission, then protect/sign for delivery.

OCR PDF

OCR PDF to searchable text — recognize scanned documents with Tesseract.

Use Cases

Typical scenarios for OCR PDF — see if it fits before you start

OCR PDF · Scenario 1

Turning scans into searchable text, OCR PDF checks text layer then falls back to local Tesseract with auto lang.

OCR PDF · Scenario 2

Batch papers/archives, OCR PDF queues with progress and exports to Word/Excel/text.

OCR PDF · Scenario 3

For scanned tables, OCR PDF preserves rows/columns and prompts proofing numbers.

How to Use

Upload — Click or drag PDF/images to the dashed zone. Multi-file and large files (<100MB per batch recommended) are read locally only.
Configure & process — Set pages, angle, password or quality, then hit “Calculate / Process”. OCR PDF runs via WebAssembly and pdf-lib in your browser — no server queue.
Preview & download — Check pages, size and thumbnails on the right, then download. Batch jobs download one by one; tweak and re-run if needed.

Tips & Notes

Page syntax: Use 1,3,5-7 or 1-10,15; empty means all. Out-of-range pages are ignored.
Privacy & size: Everything runs locally — no server upload. For large files, process in batches of 50–100 pages.
Fidelity: Fonts and vectors are preserved where possible. For scanned PDFs, run OCR/searchable PDF first, then convert.

機能

OCR searchable
Scanned text extraction
Auto language detect

Supported Formats

Input

PDF

Output

PDF

All conversions run locally in the browser; check fidelity in desktop for complex layouts.

よくある質問

Scanned not searchable, how to make searchable?

OCR PDF checks text layer, if missing runs local Tesseract (on-demand tesseract.min.js) with auto language, generating searchable layer — for contracts and invoices. Preview pages first, then by “1-20” to avoid memory spikes.

Keep tables and layout?

Best effort — paragraphs and basic table rows/columns restored, complex headers better via Word/Excel export — for reports. Preview after OCR, proofread key numbers before distribution.

Batch & offline?

Yes. Multi-page queue with progress, fully offline, no upload — for sensitive archives. Batch 20 pages at a time, close tab to clear memory per audit.

使い方