OCR PDF
ConvertRun optical character recognition (OCR) on scanned PDFs to extract text or produce a searchable PDF. Powered by Tesseract WASM in your browser.
How to use OCR PDF
- Open this page in any modern web browser — no download or installation required.
- Click Add file or drag and drop your PDF onto the drop zone.
- Adjust the available settings to fit your needs.
- Click the action button and save the processed file — the result is ready instantly.
First run downloads the OCR engine (~12 MB) — subsequent runs are instant.
Files never leave your browser. No upload to any server.
Processing runs locally on your device. No queues, no waiting.
No signup, no watermarks, no limits. Use as many times as you like.
Why use OCR PDF on PDF Modern?
PDF Modern’s ocr pdf tool processes your file entirely within your web browser using modern WebAssembly technology. Unlike traditional online PDF services that require uploading your documents to remote servers, your files never leave your device — ensuring complete privacy and security. Processing happens at the full speed of your CPU, not limited by upload or download bandwidth, so even large files are handled in seconds. There are no file-size restrictions, no daily usage caps, no watermarks on output, and no account creation needed. It is a fully free, open tool built for everyday document workflows at home, school or the office.
Frequently asked questions
How accurate is the OCR?
OCR uses Tesseract WASM, a leading open-source engine. Quality depends on scan resolution — 300 DPI clean scans give the best results.
Which languages are supported?
English by default. More languages can be added on request.
Is it really free and private?
Yes. The OCR engine downloads to your browser once and runs locally. Your PDF never leaves your device.