Extracting Images vs Saving Pages
There are two different things people mean by 'images from a PDF'. One is the original picture files that were placed into the document β a product photo, a scanned signature, a chart exported from a spreadsheet. The other is a snapshot of an entire page as it appears. This tool does the first: it walks the PDF's content streams, finds the embedded image objects, and rebuilds each one as a standalone PNG at its native resolution.
Because it reads the real embedded bitmaps, you get the images at the quality they were stored β often higher than what is visible on a scaled-down page. If a graphic is actually vector art (lines and shapes rather than a photo) it cannot be extracted as an image; in that case, render the whole page with the PDF to PNG tool instead.
Read Locally, Nothing Uploaded
The PDF is parsed in your browser and the image objects are decoded to PNG on your device. No document or image data is sent to a server β the only network request is the one-time download of the open-source library that does the parsing.