Umiocr is a free, modern Optical Character Recognition (OCR) web application designed to help you extract text from images, screenshots, and PDFs instantly. Built to run entirely in the browser, Umiocr delivers high-speed, accurate text recognition without the need for installing any software or uploading your files to remote servers.
What Makes Umiocr Special?
Unlike traditional online OCR services that send your documents to a cloud API or require paid subscriptions, Umiocr performs all processing locally on your device. This means:
- 100% Privacy by Design — your documents never leave your machine, making it safe for sensitive data.
- Zero Installation — access powerful OCR capabilities instantly on any device with a modern web browser.
- No Limits or Paywalls — process as many pages or files as you need, entirely for free.
- Unified Language Model — recognize up to 50 languages automatically in a single session.
Supported Languages
Umiocr handles a wide variety of scripts and mixed-language documents, including:
- Simplified Chinese
- Traditional Chinese
- English
- Japanese
- Korean
- European languages (French, German, Spanish, Portuguese, Italian, etc.)
- Mixed language scripts (such as Chinese-English technical guides)
How It Works Under the Hood
Umiocr leverages ONNX Runtime Web to run lightweight, optimized machine learning models (specifically the PP-OCRv6 Tiny model weights released by PaddleOCR) directly in your browser. By utilizing your device’s local CPU or GPU (WebGPU backend), it performs complex pattern recognition tasks on the client side.
This combination of web accessibility and local execution gives you the ease of a website with the security and offline speed of desktop software.
Getting Started
Simply visit umiocr.com, click Launch OCR Tool at the top of the page, drag and drop your image, and copy your extracted text in seconds. No sign-up, login, or configuration required.