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Version 2 is now available and under development in the master branch, read a story about v2: Why I refactor tesseract.js v2?
Check the support/1.x branch for version 1
Tesseract.js is a javascript library that gets words in [almost any language](./docs/tesseract_lang_list.md) out of images. ([Demo](http://tesseract.projectnaptha.com/))
Image Recognition
[](http://tesseract.projectnaptha.com)
Video Real-time Recognition
Tesseract.js wraps an [emscripten](https://github.com/kripken/emscripten) [port](https://github.com/naptha/tesseract.js-core) of the [Tesseract](https://github.com/tesseract-ocr/tesseract) [OCR](https://en.wikipedia.org/wiki/Optical_character_recognition) Engine.
It works in the browser using [webpack](https://webpack.js.org/) or plain script tags with a [CDN](#CDN) and on the server with [Node.js](https://nodejs.org/en/).
After you [install it](#installation), using it is as simple as:
```javascript
import Tesseract from 'tesseract.js';
Tesseract.recognize(
'https://tesseract.projectnaptha.com/img/eng_bw.png',
'eng',
{ logger: m => console.log(m) }
).then(({ data: { text } }) => {
console.log(text);
})
```
Or more imperative
```javascript
import { createWorker } from 'tesseract.js';
const worker = createWorker({
logger: m => console.log(m)
});
(async () => {
await worker.load();
await worker.loadLanguage('eng');
await worker.initialize('eng');
const { data: { text } } = await worker.recognize('https://tesseract.projectnaptha.com/img/eng_bw.png');
console.log(text);
await worker.terminate();
})();
```
[Check out the docs](#documentation) for a full explanation of the API.
## Major changes in v2
- Upgrade to tesseract v4.1.1 (using emscripten 1.39.10 upstream)
- Support multiple languages at the same time, eg: eng+chi\_tra for English and Traditional Chinese
- Supported image formats: png, jpg, bmp, pbm
- Support WebAssembly (fallback to ASM.js when browser doesn't support)
- Support Typescript
## Installation
Tesseract.js works with a `
```
After including the script the `Tesseract` variable will be globally available.
### Node.js
**Tesseract.js currently requires Node.js v6.8.0 or higher**
```shell
# For v2
npm install tesseract.js
yarn add tesseract.js
# For v1
npm install tesseract.js@1
yarn add tesseract.js@1
```
## Documentation
* [Examples](./docs/examples.md)
* [Image Format](./docs/image-format.md)
* [API](./docs/api.md)
* [Local Installation](./docs/local-installation.md)
* [FAQ](./docs/faq.md)
## Use tesseract.js the way you like!
- Offline Version: https://github.com/jeromewu/tesseract.js-offline
- Electron Version: https://github.com/jeromewu/tesseract.js-electron
- Custom Traineddata: https://github.com/jeromewu/tesseract.js-custom-traineddata
- Chrome Extension #1: https://github.com/jeromewu/tesseract.js-chrome-extension
- Chrome Extension #2: https://github.com/fxnoob/image-to-text
- Firefox Extension: https://github.com/gnonio/korporize
- With Vue: https://github.com/jeromewu/tesseract.js-vue-app
- With Angular: https://github.com/jeromewu/tesseract.js-angular-app
- With React: https://github.com/jeromewu/tesseract.js-react-app
- Typescript: https://github.com/jeromewu/tesseract.js-typescript
- Video Real-time Recognition: https://github.com/jeromewu/tesseract.js-video
## Contributing
### Development
To run a development copy of Tesseract.js do the following:
```shell
# First we clone the repository
git clone https://github.com/naptha/tesseract.js.git
cd tesseract.js
# Then we install the dependencies
npm install
# And finally we start the development server
npm start
```
The development server will be available at http://localhost:3000/examples/browser/demo.html in your favorite browser.
It will automatically rebuild `tesseract.dev.js` and `worker.dev.js` when you change files in the **src** folder.
### Online Setup with a single Click
You can use Gitpod(A free online VS Code like IDE) for contributing. With a single click it will launch a ready to code workspace with the build & start scripts already in process and within a few seconds it will spin up the dev server so that you can start contributing straight away without wasting any time.
[](https://gitpod.io/#https://github.com/naptha/tesseract.js/blob/master/examples/browser/demo.html)
### Building Static Files
To build the compiled static files just execute the following:
```shell
npm run build
```
This will output the files into the `dist` directory.
## Contributors
### Code Contributors
This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
### Financial Contributors
Become a financial contributor and help us sustain our community. [[Contribute](https://opencollective.com/tesseractjs/contribute)]
#### Individuals
#### Organizations
Support this project with your organization. Your logo will show up here with a link to your website. [[Contribute](https://opencollective.com/tesseractjs/contribute)]
