What this does
Turns each page of a PDF into a JPG, the image format every messaging app
and upload form accepts. Pick a DPI, press Convert, and each page appears
as a thumbnail with its own Save link; from two pages
upward there is also a Download all as ZIP button that
produces pdf-pages.zip. Pages are drawn by pdf.js inside your
browser and encoded by the browser's own JPEG encoder at quality 0.92. The
PDF is never uploaded.
JPG is the right output when the PDF is itself made of photographs or scans: a phone-scanned receipt, a photographed ID, a brochure. Those pages are already continuous-tone images, and JPG stores them at a fraction of the size a PNG would need.
How do I convert a PDF to JPG?
- Choose the PDF file.
- Pick a quality: Screen (96 DPI) for chat and web, High (150 DPI, the default) for most uses, Print (300 DPI) for anything going to paper.
- Press Convert, then save single pages or the ZIP.
Files are named after the PDF with a zero-padded page number,
invoice-01.jpg, invoice-02.jpg, so they sort
correctly.
How large will the JPG files be?
Size is driven by DPI and by what is on the page. A US Letter page is 816 × 1056 px at 96 DPI, 1275 × 1650 at 150 and 2550 × 3300 at 300, and the file grows roughly with the pixel count. A mostly-white text page at 150 DPI is often a couple of hundred kilobytes; a full-bleed photo page at 300 DPI can be a few megabytes. The quality is fixed at 0.92, which is high; if a form needs the image under a certain size, run the JPG through the image compressor or resizer afterwards rather than dropping to 96 DPI, which softens text.
Why does the JPG have a white background?
JPEG has no transparency, so the canvas is filled white before the page is drawn. pdf.js paints the same white background for every format, so nothing is lost relative to PNG here. If you need a transparent cut-out of a logo, you need the original artwork; a rendered page is always a solid rectangle.
Will text pages look worse as JPG?
Slightly, at close inspection. JPEG leaves faint halos around high-contrast edges, visible when you zoom into small type or thin table rules, though rarely at normal size from 150 DPI up. For pages that are mostly text, line art or screenshots, PDF to PNG gives a cleaner result, and you can always convert a PNG down to JPG later with PNG to JPG.
Is the text in the JPG still searchable?
No. A JPG is a grid of pixels; the words, fonts and links in the PDF do not survive the trip. That is fine for sharing a page as a picture, but if the recipient needs to copy a paragraph or search the document, send a PDF instead. The PDF splitter pulls out a single page with its text intact.
How many pages can I convert at once?
Up to 50 per run; a longer document renders the first 50 and says so. Rendered pages are held in memory until you convert again, so on a phone 150 DPI is the safe choice for long files. The only network requests are optional pdf.js font and character-map files from a CDN, fetched when a PDF uses a standard font it did not embed.