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SnapOtter/apps/docs/tools/pdf/ocr-pdf.md
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description
description
Extract text from PDF documents using AI-powered OCR.

PDF OCR

Extract text from PDF documents using AI-powered optical character recognition. Supports multiple quality tiers and languages. Requires the OCR feature bundle to be installed.

API Endpoint

POST /api/v1/tools/pdf/ocr-pdf

Accepts multipart form data with a PDF file and an optional JSON settings field.

Parameters

Parameter Type Required Default Description
quality string No "balanced" OCR quality tier: fast, balanced, best
language string No "auto" Document language: auto, en, de, fr, es, zh, ja, ko
pages string No "all" Page selection, e.g. "all", "1-3", "1,3,5"

Example Request

curl -X POST http://localhost:1349/api/v1/tools/pdf/ocr-pdf \
  -H "Authorization: Bearer si_your-api-key" \
  -F "file=@scanned.pdf" \
  -F 'settings={"quality": "best", "language": "en", "pages": "1-5"}'

Example Response

Returns 202 Accepted. Track progress via SSE at /api/v1/jobs/{jobId}/progress.

{
  "jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "async": true
}

Notes

  • Accepted input format: .pdf.
  • This is an AI tool that requires the OCR feature bundle to be installed. If the bundle is not installed, the API returns 501 Not Implemented.
  • The fast quality tier uses a lighter model for quicker processing; best uses a more accurate model at the cost of speed.
  • The auto language setting attempts to detect the document language automatically.
  • You can target specific pages using ranges ("1-3"), comma-separated lists ("1,3,5"), or "all" for every page.
  • For PDFs that already contain selectable text, consider using the faster PDF to Text tool instead.