Tesseract

At a glance

Input

PNG, JPEG, TIFF and other images

Output

TXT, TSV, hOCR

Provenance

Word-level coordinates

Scanned pages

Supported

Deployment

Self-hosted

Availability

Open source

Costs to plan for

Compute costs

Limitations to check

Render PDFs into images first. Install the required language packs and correct page rotation and skew.

Build a meaningful sample

Include your hardest pages: low-quality scans, missing fields, dense tables, and evidence split across pages. Validate output correctness separately from citation accuracy.