OCR PDF Pro

Browser-local

Pro engine

wave 2

Run local OCR on rendered PDF pages with page-range controls and confidence metrics.

Files

Source

No PDF selected

Size

0 B

InputsOCR PDF Pro0 filesLive

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Merge Split Extract Delete Duplicate Rotate Reorder Compress Image to PDF Page numbers Text extract OCR Pro Fill & sign Editor Pro Bates Watermark Header/footer

PDF workflow rail

17 actions

Merge Split Extract Delete Duplicate Rotate Reorder Compress Image to PDF Page numbers Text extract OCR Pro Fill & sign Editor Pro Bates Watermark Header/footer

Input file

Local only

Drop a PDF file here or browseSingle file workflow with browser-local processing.

No files queuedBrowser-local workflowPDF input

OCR setup

Tune page range, languages, DPI, and preprocessing before running local OCR.

Page range

Max pages

OCR mode

Languages (comma-separated)

OCR DPI

Preprocessing

GrayscaleContrast boostThresholdDeskew hint

OCR runs locally in your browser worker. Wave 1 exports TXT + JSON (word boxes/confidence), not searchable PDF.

Flow

Render selected pages locally in browser.
Run OCR worker with selected languages and preprocessing options.
Export TXT output plus JSON (word bbox + confidence).

Example

Worked example: scanned invoice PDF

1 Upload invoice-scan.pdf.
2 Run OCR on pages 1-10 at 150 DPI with eng,spa,fra,deu.
3 Download TXT + JSON outputs for downstream parsing.

You get recognized text with confidence metadata per page.

How

Upload one PDF.
Set page range, mode, and language preset (or custom list like eng,spa,fra,deu).
Run OCR and export TXT or JSON output.

Cases

Quickly extract text from exported office PDFs.
Validate if scanned files contain selectable text.
Generate plain text for lightweight auditing.

Avoid

Skipping confidence review on low-quality scans.
Running high DPI OCR on huge documents without page-range limits.
Assuming Wave 1 OCR export is searchable PDF (it exports TXT/JSON).
Ignoring low-confidence page warnings before downstream parsing.

FAQ

Does ocr pdf pro upload files to a server?

No. OCR PDF Pro keeps the lightweight PDF workflow in your browser by default, so files are not sent to Calctrove servers for routine edits. For OCR PDF Pro, verify your workplace policy before handling sensitive documents.

Can I process confidential documents here?

For OCR PDF Pro, use caution on shared devices and verify your organization policy before handling sensitive files.

Why can ocr pdf pro change output size?

For OCR PDF Pro, output size depends on the PDF structure, embedded fonts, image compression, and the mode options selected before export.