From Image to Text

Optical Character Recognition (OCR) is one of the oldest fields of computer vision, but it has recently seen a massive leap forward thanks to Deep Learning.

Tesseract and WebAssembly

Tesseract is a powerful open-source OCR engine. By compiling C++ code into WebAssembly (WASM), developers can now run Tesseract directly in the browser. This powers our Free online OCR and Scan PDF to text in browser tools.

When you take a photo using our Web-Based PDF Scanner, the browser utilizes an LSTM (Long Short-Term Memory) neural network to recognize the characters. Because the model is loaded into your browser's RAM, the recognition happens locally, ensuring maximum privacy and lightning-fast speeds.