Alt Engines
This repository contains plugins for Umi-OCR, including components that add OCR engines.
About Alt Engines
Alt Engines is the Umi-OCR_plugins repository for the open source Umi-OCR software. It stores plugins that add OCR engines to Umi-OCR version 2 and above. Plugins are added by placing extracted files in the UmiOCR-data/plugins folder.
You can download plugin archives from Releases and choose engines for different needs. Options include PaddleOCR-json for Windows and Linux, RapidOCR-json, Pix2Text, TesseractOCR, ChineseOCR, WeChat OCR, and a Mistral AI OCR API plugin. Most plugins run locally on CPU, while the Mistral plugin uses cloud API calls. Language coverage varies by plugin and includes Chinese, English, Japanese, Korean, Russian, and math formulas.
It suits Umi-OCR users on Windows 7 64-bit or later and Linux x64 who need additional engines. It is also for developers who want plugin development documentation and a demo to build their own components.
Key features
- Adds OCR engines to Umi-OCR v2 via plugin folder
- Provides PaddleOCR-json plugin for Windows and Linux
- Includes RapidOCR, Tesseract, Pix2Text and WeChat OCR plugins
- Offers Mistral AI OCR plugin using cloud API calls
- Supports multiple languages and math formulas by plugin
- Includes plugin development documentation and demo
Best for: Umi-OCR users on Windows or Linux who need extra OCR engines or language support.
Good for
- Open source repository with MIT license
- Multiple local CPU-based OCR options
- Supports Windows 7 64-bit and Linux x64
- Includes cross-platform cloud API plugin option
Watch out for
- Must download from Releases, not source code
- PaddleOCR-json requires CPU with AVX instruction set
- Pix2Text plugin is large and loads slowly
Alt Engines at a glance
- Category
- Online Tools › PDF & Document Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Linux, Windows
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for PDF & Document Tools
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Alt Engines FAQ
How do I install plugins from Alt Engines?
Download the plugin archive from Releases, then extract it to UmiOCR-data/plugins. Do not download the repository source code directly.
Which plugins work on Linux?
The PaddleOCR-json plugin supports Windows and Linux. The Mistral AI plugin is listed as cross-platform.
Do these OCR plugins work offline?
Most listed plugins run locally on CPU. The Mistral AI plugin uses cloud API calls.
What OCR engines are included?
The repository lists PaddleOCR-json, RapidOCR-json, Pix2Text, TesseractOCR, ChineseOCR, WeChat OCR, and Mistral AI OCR.
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