PDF to JPG (and PNG)

How it works

The page reads your PDF with pdf.js, the open-source PDF reader made by Mozilla for Firefox, which runs inside your browser. Each page you choose is drawn onto a canvas at the resolution you picked and saved as an image. The PDF is not uploaded, so confidential documents stay on your device.

• Resolution: PDF pages are measured in points (72 per inch). At 150 DPI an A4 page becomes 1240 × 1754 pixels; at 300 DPI, 2480 × 3508 pixels. Very large pages are drawn at a lower DPI so your browser does not run out of memory, and the result says so.
• JPG or PNG: JPG files are small and fine for photos and most documents. PNG keeps small text and thin lines perfectly crisp, but the files are larger.
• Pages: leave the box empty for every page, or type pages and ranges such as 1-3,5,8- (page 8 to the end).

Worked example

A 4-page A4 contract that needs to go into an upload form accepting only images: choose the PDF, keep JPG at 150 DPI and press Convert. You get contract-page-01.jpg to contract-page-04.jpg, each 1240 × 1754 pixels and usually a few hundred KB, plus one ZIP with all four. If the form also has a size limit, run the images through the image compressor.

Limits

• Password-protected PDFs are not opened. Save a copy without the password in your PDF app first.
• Fillable forms are drawn as they look; XFA forms (some government forms) may show only a placeholder page.
• Large PDFs: pages are converted one at a time, but hundreds of pages at 300 DPI or more can be slow on a phone. Convert in parts using the Pages box.

Going the other way? JPG to PDF turns images into a PDF, and merge and split PDF combines PDFs or extracts pages.