How to convert a PDF to JPG
- Add the PDF. Tap Choose PDF (or drop the file onto the page). If the file asks for a password, type it and tap Open.
- Pick the format, DPI and pages. Leave JPG selected or switch to PNG. Choose 150 DPI for most uses, 300 DPI for printing, 72 DPI for the smallest files. Type a page range such as 1-3, 7 or leave it empty for all pages.
- Convert. Tap Convert to JPG. Pages are rendered one after another, with a preview and a size for each one as it finishes.
- Download. Tap Download next to a page, or Download all as ZIP to get every page in one file. The images are named after the PDF with the page number added.
What it does
- Converts every page, or just a page range like 1-3, 7, to JPG or PNG
- Three resolutions: 72 DPI for screens and email, 150 DPI for upload forms, 300 DPI for print
- JPG quality slider; PNG keeps transparency and sharp text
- Download each page separately or all pages as one ZIP
- Opens password-protected PDFs when you know the password
- Runs entirely on your device — the only network request fetches the open-source PDF.js renderer
What does this tool do?
It takes a PDF and turns each page into an ordinary image file — JPG or PNG — at a resolution you pick. The work is done by PDF.js, the open-source renderer built into Firefox, running inside this page. PDF.js draws the page onto a hidden canvas; your browser then encodes that canvas with its own JPEG or PNG encoder. There is no server step. The PDF, the bitmaps and the images exist only in the memory of this browser tab.
How do I choose between 72, 150 and 300 DPI?
DPI (dots per inch) decides how many pixels each inch of the page gets. A PDF page has a physical size in points (72 points to an inch), so the pixel size of the image follows directly from the DPI. The table shows the exact pixel dimensions for the two most common page sizes, the memory a single page needs while it is being drawn (width × height × 3 bytes), and what each setting is good for. The final JPG is far smaller than the bitmap — how much smaller depends on the page: a plain text page compresses to a tiny fraction, a photo scan much less.
| DPI | US Letter (8.5 × 11 in) | A4 (210 × 297 mm) | Bitmap while rendering (Letter) | Good for |
|---|---|---|---|---|
| 72 | 612 × 792 px | 595 × 842 px | about 1.5 MB | Email attachments, quick previews, chat messages, thumbnails |
| 150 | 1275 × 1650 px | 1240 × 1754 px | about 6.3 MB | Upload forms, web pages, reading on a screen, most ID and document uploads |
| 300 | 2550 × 3300 px | 2480 × 3508 px | about 25 MB | Printing, OCR, archiving, anything with fine print or small handwriting |
Many upload forms set a maximum of a few megabytes per image and sometimes a maximum pixel size as well; 150 DPI JPG is usually the setting that satisfies both. If a form rejects the file, try 72 DPI or lower the JPG quality before reaching for a separate compressor.
When should I convert a PDF to an image at all?
- A website or app only accepts JPG or PNG (job applications, visa portals, insurance claims, marketplace listings).
- You want to paste one page into a message, a slide or a document without the recipient opening a PDF.
- You need a flat picture of a signed form that cannot be edited field by field.
- You want to crop or annotate a single page in a photo editor.
If you are going the other way — you have photos and need one PDF — use JPG to PDF. To cut a long PDF into separate PDFs, not images, use Split PDF.
What is lost when a page becomes a JPG?
Everything that is not visible. Selectable text, hyperlinks, bookmarks, form fields, comments and the document's metadata (author, creation date) are not carried into the image. That is sometimes the point — a flattened picture of a filled form is harder to tamper with — but it also means the image cannot be searched. The image to searchable PDF tool can add an OCR text layer back later if you need one. JPG is also lossy: at 90 percent quality the difference is invisible for documents, but repeated re-saving degrades text edges, so keep the original PDF.
What are the limits?
- Everything happens in one browser tab, so memory is the ceiling. Pages render sequentially and each bitmap is released before the next one starts, but a 300 DPI render of a long scan still takes time on a phone. The tool warns above 100 MB or 200 pages; convert a page range instead.
- Pages larger than about 64 megapixels at the chosen DPI are rendered at the largest size the browser can allocate, and the tool says so.
- Password-protected files open when you supply the password. Files that are damaged, or that use features PDF.js cannot render (rare encodings, some XFA forms), may come out blank or fail with a message.
- Fonts that are not embedded in the PDF are substituted by PDF.js, so the rendering can differ slightly from Acrobat's.