A three-page document at screen DPI
- Input
- A 3-page A4 PDF, 150 DPI, PNG
- Working
- Each page: round(595.28 ÷ 72 × 150) = 1240 wide and round(841.89 ÷ 72 × 150) = 1754 high. Three pages produce three images.
- Result
- Three PNGs, each 1240 × 1754 px
Convert PDF pages to PNG or JPEG images in your browser — each page rendered at the DPI you choose. Processed entirely on your device, never uploaded. Runs entirely in your browser — your numbers never leave this device.
No PDF yet. Choose one above — every page is rendered on this device at the DPI you pick, and downloaded as a single image (one-page PDFs) or a ZIP of images.
| DPI | Width (px) | Height (px) | Typical use |
|---|---|---|---|
| 72 | 595 | 842 | Rough preview, thumbnails |
| 150 | 1240 | 1754 | Screens, slides, web use |
| 200 | 1654 | 2339 | Sharp screen use, casual print |
| 300 | 2480 | 3508 | Print-quality rendering |
Your file is processed entirely in your browser and never uploaded: the PDF is opened on your own device, each page is rendered by the page renderer into pixels at the DPI you choose, encoded as PNG or JPEG, and offered back as downloads. Nothing reaches a server at any point and the tool works offline once the page has loaded. Rendering is the honest opposite of the structural tools: a rendered page is a picture of the page, so text becomes pixels — sharp at the chosen DPI, but no longer selectable or searchable in the output image.
DPI is the one real decision, and its arithmetic is fixed: pixel dimensions are the page's size in points divided by 72 (points per inch) multiplied by the DPI, rounded to whole pixels. For an A4 page that gives 1240 × 1754 at 150 DPI — right for screens and slides — 1654 × 2339 at 200 DPI, and 2480 × 3508 at 300 DPI for print, as the table below shows. File count is the page count: a 3-page PDF produces 3 images. Higher DPI multiplies pixel counts fast (doubling DPI quadruples the pixels), so render at the size the destination actually needs.
Format follows purpose. PNG is lossless and the right choice for pages with fine text, line art or anything that will be edited or OCR'd elsewhere — at the price of larger files. JPEG is smaller and fine for photographic pages and quick sharing, with the usual lossy artefacts around sharp text edges at low quality. Pages keep their proportions at every DPI, and a landscape page renders landscape: the formula applies to each page's own width and height, so mixed-size documents produce mixed-size images, each correct for its page.
No. The file is opened and rendered entirely inside your browser; the PDF and the images produced from it never leave your device, are never stored or logged, and the tool works offline.
150 DPI for anything read on a screen — an A4 page at 1240 × 1754 is already larger than most displays show it. 200 DPI when the image will be zoomed or casually printed; 300 DPI for print-quality output. Higher is not free: doubling DPI quadruples the pixels and roughly the rendering work and file size.
PNG for text-heavy pages, line diagrams and anything headed for further editing or OCR — it is lossless. JPEG for photographic pages and quick sharing where a smaller file matters more than perfect edges around text.
Yes, with Images to PDF — one image per page, in list order. Note the round trip is not free: the original text layer does not come back, because the images are pictures of pages. Keep the original PDF whenever the text matters.
Because rendering converts the page to pixels. Selectability lives in the PDF's text layer, which an image does not have. If you need the words themselves rather than a picture of them, use PDF to Text.
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