The PDF is opened on your device.
You state the language of the document: recognition takes it into account.
The document still looks identical, but now the text can be searched and copied.
The file does not leave your device. Thirty-two tools out of thirty-eight.
No, and it should be said: it depends on the quality of the scan, the typeface and the condition of the document. On a clean scan the result is very good; on a faded fax or a handwritten page it is partial. Recognised text should be reread if you are going to rely on it.
No: the OCR engine is loaded into the browser and works on your device. The scan is not uploaded to Plicum servers — which matters, since these are often documents you would rather not send anywhere.
No: the recognised text is placed under the image, invisible. You see the original scan, but you can search inside it.
It opens in your browser, nothing to install. Five operations a day are free, with no payment details.