DPI is the dial that controls everything
When you turn a PDF page into a JPG, the single most important setting is DPI (dots per inch) — the resolution at which the page is rendered. Because a PDF is a vector document, it has no fixed pixel size of its own; you decide how detailed the resulting image is. Pick the right DPI and your JPGs look crisp at any zoom. Pick too low and text turns soft and fuzzy.
Which DPI should you choose?
| DPI | Best for | Result |
|---|---|---|
| 72–96 | Quick thumbnails, previews | Small file, soft detail |
| 150 | On-screen viewing, web, email | Crisp on screens, modest size |
| 300 | Printing, zooming, archiving | Print-sharp, larger file |
| 600 | Fine print, detailed line art | Very sharp, large file |
Why your JPG came out blurry
Ninety percent of the time, blurry output means the DPI was too low for the content. A page dense with small text rendered at 72 DPI simply doesn't have enough pixels to keep the letters sharp. Bump it to 200–300 DPI and the crispness returns instantly. The other common cause is upscaling a low-DPI image after the fact — always render at the resolution you need rather than enlarging later.
Balancing sharpness against file size
Higher DPI means more pixels, which means a bigger JPG. The trick is to match the DPI to how the image will actually be used:
- Posting online or emailing? 150 DPI looks great and stays light.
- Printing a flyer or document? 300 DPI keeps text and lines sharp on paper.
- Just need a preview? 96 DPI is tiny and loads instantly.
If a 300-DPI export is larger than you'd like, you can compress the finished JPGs — the quality setting trims file size with little visible change at sensible levels.
Extra tips for the cleanest results
Start with a good PDF
If the PDF itself contains low-resolution scanned images, no amount of DPI will make them sharper — you can only render what's there. A "born-digital" PDF (created from a document, not a photo) gives the crispest JPGs.
Watch the colour
JPG is built for photographic content and handles full-colour pages well. Pages that are mostly flat colour with crisp text can sometimes look cleaner as PNG — but for general use, a high-DPI JPG is the right, compact choice.
Keep an eye on orientation
Landscape pages should be exported in landscape. A good converter preserves the page orientation automatically, so the JPG matches the original layout.
Ready to apply this? Walk through the step-by-step guide, or head back to the free PDF-to-JPG home.
Frequently asked questions
What DPI should I use for PDF to JPG?
Use 150 DPI for on-screen viewing and web use, and 300 DPI when the JPG needs to be printed or zoomed into. Higher DPI means a sharper but larger image.
Why does my converted JPG look blurry?
Low DPI is the usual cause. Rendering a detailed page at 72 DPI produces soft text; bump the DPI to 200–300 and the sharpness returns.