Scanner app with recognition of annotations

All you need is a good book and a marker. Organize what you have read by selecting what is important.

What can I do with it?

Convert text from image. Optionally detect highlighted or underlined text.

Get Started

Upload an image (png or jpg)

Apply marker highlights recognition

Apply underlinings recognition

Converted text:

Google Vision OCR

The OCR is based on Google Cloud Vision API, the best OCR engine you can find.

Detecting marker highlights

Based on OpenCV, the most well-known framework for image processing.

Detecting underlinings

Based on a custom made image processing algorithm for detecting and separating out the underlined parts.

Languages supported

Currently 56 languages are supported. You can check if your language is supported here.

Access from anywhere

You do not need to install a software. The online web app works perfectly on all devices and popular browsers.


We are very cautious about security. Everything goes through SSL encryption. Additionally, we destroy all files automatically from our servers.