Free Online OCR - Extract Text from Images
Extract text from images using browser-based optical character recognition. Supports 16+ languages including English, Chinese, Japanese, and Arabic.
Runs in your browser. No data leaves your device.
Frequently Asked Questions
How does the OCR tool work?
Your image is optionally upscaled on an OffscreenCanvas and preprocessed with pixel-level filters like adaptive thresholding, inversion, or high-contrast enhancement. The processed image is then passed to Tesseract.js, a WebAssembly port of the Tesseract OCR engine that runs entirely in your browser. Tesseract downloads a language-specific trained data model on first use (cached for future sessions), then performs character recognition with configurable page segmentation modes.
Is the OCR processing done on my device?
Yes. All text recognition runs locally in your browser using Tesseract.js. Your images are never uploaded to any server. The only network request is downloading the language model on first use, which is cached by the browser for future sessions.
What languages does the OCR support?
Over 16 languages including English, Spanish, French, German, Italian, Portuguese, Chinese (Simplified and Traditional), Japanese, Korean, Russian, Arabic, Hindi, Dutch, Polish, and Turkish.
What image formats are supported?
Any image format your browser can display: JPEG, PNG, WebP, GIF, BMP, and more. For best results, use clear, high-resolution images with good contrast between text and background.
How can I improve OCR accuracy?
Use high-resolution images with clear, printed text on a clean background. Avoid low contrast, heavy noise, rotation, or handwritten text. Cropping the image to just the text region also helps.