Best Free OCR Tools Online (2026)
OCR (Optical Character Recognition) converts scanned images, photos, and PDF pages into editable text. In 2026, the best free options range from browser-based Tesseract to cloud-powered Google Vision.
Top free OCR tools compared
| Tool | Engine | Privacy | Languages | Best For |
|---|---|---|---|---|
| Irreva Image to Text | Tesseract.js (browser) | No upload | 60+ | Quick extractions, private docs |
| Irreva PDF OCR | Tesseract.js (browser) | No upload | 60+ | Scanned PDFs, private files |
| Google Drive OCR | Google Vision | Upload to Google | 100+ | High accuracy, multi-language |
| OnlineOCR.net | ABBYY-based | Server upload | 46 | Multi-page PDFs |
| Adobe Scan (mobile) | Adobe Sensei | Cloud storage | 25+ | Phone camera scans |
Which to use in 2026
- For privacy (contracts, medical, financial docs): Irreva — no upload, Tesseract runs locally
- For highest accuracy on clean printed text: Google Drive OCR (upload a PDF, open with Docs)
- For handwritten text: Google Vision API or Microsoft Azure Computer Vision (paid)
- For mobile phone scanning: Adobe Scan or Google PhotoScan
- For bulk processing: Google Cloud Vision or AWS Textract (paid APIs)
Frequently Asked Questions
What DPI gives best OCR accuracy?
300 DPI minimum for clean printed text. 600 DPI for small fonts or degraded scans. Below 200 DPI accuracy drops significantly.
Can any free OCR tool read handwriting?
Tesseract has very limited handwriting support. Google Vision and Microsoft Azure Computer Vision are far better for handwritten text but have usage costs.