When you need a PDF page as an image
PDFs are great for documents, but awkward in places that expect pictures. An image opens instantly in any gallery or chat app, can be dropped into a slide or a document, and is accepted by upload forms that only allow JPG. Converting PDF to JPG solves all of these:
- Sharing on WhatsApp, social media or a website: post a flyer, menu, poster or certificate as a picture people can see without opening a file.
- Slides and documents: insert a page, chart or diagram into PowerPoint, Google Slides or Word as an image.
- Image-only upload forms: some portals ask for a certificate or letter as a JPG rather than a PDF.
- Previews and thumbnails: show the first page of a report or brochure on a web page.
- Quick reference: keep one page of a long manual, timetable or ticket in your phone's photo gallery.
Which DPI should you choose: 72, 150 or 300?
PDF pages have a physical size: A4 is 210 × 297 mm, US Letter is 8.5 × 11 inches. DPI (dots per inch) decides how many pixels are used for each inch of that page when it's turned into an image. More DPI means more pixels, sharper detail and a bigger file.
Image size for one page at each resolution
| Resolution | A4 page (approx. pixels) | US Letter page (approx. pixels) | Best for |
|---|---|---|---|
| 72 DPI | 595 × 842 | 612 × 792 | Thumbnails, quick previews and small web images |
| 150 DPI | 1240 × 1754 | 1275 × 1650 | Phone and computer screens, WhatsApp, email, slides and most upload forms |
| 300 DPI | 2480 × 3508 | 2550 × 3300 | Printing, zooming into small print, archiving and detailed diagrams |
150 DPI is the right choice most of the time. Text is clear on any screen and files stay a manageable size. Doubling to 300 DPI gives four times as many pixels, so each image is much larger and long documents take longer to convert (worth it for printing, not for a WhatsApp message). 72 DPI is only suitable when the image will be shown small.
One thing a higher DPI can't do is add detail that isn't in the PDF. Pages made of real text and vector graphics get sharper as you raise the DPI, but a scanned PDF is already a picture: once you pass the resolution it was scanned at, the image just gets bigger, not clearer.
JPG or PNG?
Both formats work everywhere. The difference is how they store the page:
- JPG uses lossy compression, so files are small. It's the best choice for scanned documents and pages full of photos, and the format upload forms most often ask for.
- PNG is lossless: every pixel is stored exactly, so text, lines and charts stay perfectly crisp. The trade-off is larger files, especially at 300 DPI.
If your pages are mostly text, slides or diagrams, see PDF to PNG for when lossless output is worth the extra size.
Converting only some pages
You don't have to convert a 40-page document to get the one page you need. After the PDF opens, use the page thumbnails to select specific pages and only those are converted. This is faster and saves you from digging through a ZIP full of images.
If you want the selected pages as a smaller PDF rather than as images (for example to email just pages 3 to 5 of a contract), use Split PDF instead, which keeps the text selectable.
Password-protected PDFs
Bank statements, payslips and e-statements are often protected with a password that you need to open them. If your PDF asks for one, type it in and the file opens in your browser. The password is only used locally to open the document; it isn't sent anywhere. The tool can't open a protected PDF without the correct password.
Remember that images don't carry the PDF's protection. Once a protected page is saved as a JPG, anyone who has the image can see it, so share converted statements and IDs carefully.
Converting PDF to JPG on a phone
The converter works in the browser on Android phones and iPhones, so you don't need to install an app. Open the PDF from your Downloads, Files app or an email attachment, convert it, and the images are saved like any other download.
If you only need one or two pages, download those images individually: they're easier to share straight away than a ZIP. For a long document the ZIP is quicker; most phones can open it in their built-in files app. Large PDFs at 300 DPI take longer on older phones because the pages are rendered on the device itself, so 150 DPI is a good choice on mobile.
Private by design
Most PDF-to-image websites upload your document to their servers and send the images back. With KBSnap the pages are rendered inside your browser on your own device, so your file isn't uploaded, stored or seen by anyone. There's no sign-up, no watermark and no limit on how many PDFs you convert.
Good to know
- The converted images are pictures of your pages: the text in them can't be edited or copied, as the tool doesn't perform text recognition (OCR).
- Need a smaller JPG for a form with a KB limit? Run it through Compress Image, or set exact dimensions with the Image Resizer.
- To turn images back into a PDF, use JPG to PDF.