Convert PDF pages to JPG or PNG images

JPG or PNG?

Pick JPG for anything that started life as a photograph or a scan. It throws away detail the eye does not notice and the files come out several times smaller, which is what you want for email attachments, uploads with a size limit, or posting a page somewhere.

Pick PNG when the page is mostly text, tables, line art or a diagram. PNG is lossless, so the sharp black-on-white edges of text stay sharp. JPG compresses those same edges by blurring them slightly and scattering faint grey speckles around each letter — an artefact called ringing, and it is exactly what makes a converted page look slightly dirty when you zoom in. The trade is size: a text-heavy A4 page at 150 DPI is typically a few hundred kilobytes as JPG and a couple of megabytes as PNG.

Which resolution to choose

A PDF stores a page as instructions, not pixels, so there is no "original resolution" to preserve — the size of the image is entirely your choice. DPI means dots per inch, and a PDF page is measured in real inches, so the two multiply out to a pixel size:

Higher is not automatically better. Tripling the DPI multiplies the pixel count by nine, so a 300 DPI export of a long document can take a while and produce files far larger than the PDF you started with. If you are not going to print it, 150 is usually the sweet spot.

Converting one page instead of all of them

The page box takes ranges: 1-3, 5, 8-10 gives you seven images, 4gives you one, and 8- means page 8 to the end. This matters more than it sounds on a long document, because every page you convert costs memory and time. If you only need the signature page, ask for the signature page.

Files are named after the source document with a zero-padded page number —contract-007.jpg — so sorting by filename gives you the page order back.

Downloading

Each page gets its own download button under its preview. When there is more than one page, a Download all as ZIP button appears, which is usually what you want — browsers get suspicious about a page that triggers thirty downloads in a row, and some will block them after the first few. The ZIP is built in your browser too.

Password-protected PDFs

If the file is encrypted, the tool notices and asks for the password before doing anything else. Enter it and everything works normally. The password is used to decrypt the document in your browser's memory and is never transmitted, because there is no server here to transmit it to.

Things worth knowing

The text stops being text

An image is pixels. Once a page has been rasterised you can no longer select, search or copy the text on it, and no tool can turn it back without OCR. That is inherent to converting a document into a picture, not a limitation of this tool — if you need the text to stay text, you want a different conversion.

Very large pages are scaled down

Browsers cap how big a single canvas can be, and they fail quietly when you exceed it — you get a blank image rather than an error. So a poster-sized page at 300 DPI is rendered at the highest resolution that fits instead, and the tool tells you what it actually used.

Fonts and CJK text

Documents that reference the standard PDF fonts without embedding them, and Chinese or Japanese documents that use a predefined character map, both need extra data to render correctly. That data is served from this site and fetched only when a document actually needs it, so those pages come out right rather than as rows of empty boxes.

Questions

Is there a page limit?

No fixed limit, but every converted page is held in memory until you leave the page. Several hundred pages at 150 DPI is fine on a laptop; on an older phone, convert in batches using the page range.

Does it work offline?

Once the page has loaded, yes — apart from the font and character-map data mentioned above, which some documents fetch on first use.

Does the original PDF change?

No. The file on your disk is only ever read.