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Tesseract.js

A JavaScript library that reads text from images, right in a web browser or in Node.js.

Widely used

What it does

Tesseract.js brings the Tesseract text-recognition engine to JavaScript, so websites and apps can pull words out of images in many languages without sending them to a server.

It works in web browsers and in Node.js, a way of running JavaScript outside the browser. Its makers note it does not read PDF files and does not change Tesseract's accuracy.

Who it's for

Web developers who want to add text recognition to their sites or apps.

Can I use it without coding?

Developers only. A code library; you need to write JavaScript to use it. New to this? Start here.

Can I run it?

Cost
FreeNothing to pay or sign up for.
Runs on
Web browser, Server
Privacy
Runs on your own device: your data stays with you
API key
Not needed

Try it

Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?

Before you install

  • Only download from the official GitHub page. Copies with similar names exist for many popular projects.
  • License (Apache-2.0): Permissive: free to use, change and share, including for business.
  • More on staying safe

Where people are talking about it