Browser OCR toolkit

Deskew PDF

Re-render scanned pages with preprocessing to improve readability and OCR quality.

Drop PDF or image files here

Batch OCR runs locally with controlled page-by-page processing.

OCR languagePreprocessing

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0 files / 1 KB

Clean scanned pages before archiving or OCR.

This browser implementation normalizes raster pages and applies selected preprocessing.

For severe angled scans, use the cleanest source image available.

Deskew PDF re-renders scanned pages after correcting detectable tilt so lines and text appear straighter.

Choose the right tool: Deskew corrects small angular tilt. Auto Rotate PDF handles pages that are sideways or upside down.

Selected files are processed in your browser and do not need to be uploaded to PDFStack servers.

Deskewing corrects small page tilt introduced during scanning.

Straighter text lines can improve OCR, but results still depend on scan quality.

Use Auto Rotate PDF for 90-degree orientation problems.

No. Perspective distortion, folds and curved pages may require different correction.

Selected files are processed in your browser and do not need to be uploaded to PDFStack servers.

Use OCR Scanner for scanned-document recognition or cleanup, with results available for review.

Use OCR PDF for scanned-document recognition or cleanup, with results available for review.

Use Make PDF Searchable for scanned-document recognition or cleanup, with results available for review.

Use Image To Searchable PDF for scanned-document recognition or cleanup, with results available for review.