PDF to images — without uploading

Turning pages into images is how you get a document into places that will not take a PDF: a slide deck, a web page, a chat message, a print shop's upload form, an image-only submission field. The document itself is often not something you would want on a stranger's server on the way there.

Pages are rendered here by Mozilla's pdf.js — the same engine Firefox uses to display PDFs — running inside your browser. Nothing is transmitted; this site is static files with no backend, and a Content-Security-Policy blocks third-party requests. Once the page has loaded you can disconnect from the network and still convert.

PNG is lossless and the right default. Text, diagrams, tables, line art, and screenshots all stay crisp, with no compression artefacts around letterforms. Anything you might zoom into or read closely should be PNG.

JPEG produces much smaller files and is a reasonable choice for photograph-heavy pages, where lossy compression is nearly invisible. On pages that are mostly text it is a poor trade: JPEG's artefacts cluster exactly around the sharp edges that letters are made of, giving you a fuzzy halo effect for a saving you did not need.

If in doubt, use PNG. You can always compress it afterwards with the image converter, which also runs on your device — but you cannot recover detail JPEG has already discarded.

• 72 dpi — quick previews and thumbnails. Small and fast, not for reading.
• 150 dpi — the general-purpose choice for anything viewed on a screen: slides, web pages, documentation, chat.
• 300 dpi — print resolution. Use it when the image will actually be printed, or when someone needs to zoom in on fine detail.

Higher dpi means proportionally larger files and slower rendering, and a 300 dpi export of a long document can be substantial. Because everything runs locally there is no upload limit to work around — the practical bound is your own memory and patience.

A single page downloads as one image; multiple pages are packed into a ZIP built on your device, so you get one download rather than a prompt per page. Going the other direction, Images to PDF assembles pictures back into a document.