How to convert PDF to PNG
- Drop your PDF. PNG is preselected as the output format.
- Choose a resolution. Higher scales for print, or for images people will zoom into.
- Convert, then Download. One PNG per page, zipped once there's more than one.
For pages where every pixel matters
Wiring diagrams, sheet music, UI mockups, documentation screenshots: anything with thin lines and small type. Save a page like that as JPG and the edges fur up; PNG stores exactly what the engine drew.
The bill arrives as file size. A scanned photo album at 4× will be enormous, which is the case for PDF to JPG. The other direction, PNG to PDF, embeds losslessly too, so a round trip loses nothing.
What "lossless" actually means here
PNG compression is exact. It finds repetition and describes it more briefly, in the same way a ZIP file does, and unpacking gives back the original bytes precisely. No pixel is approximated or discarded to save space, which is why a PNG never develops the haze that JPEG leaves around sharp edges.
There is a limit to what that guarantees, and it's an important one. The PNG is a faithful record of what the renderer drew at the resolution you chose; it is not a faithful record of the page. Choose 1× and you get a perfect copy of a small, soft rendering. The losslessness protects you from compression artefacts, not from picking too low a resolution, so the resolution setting still deserves the same thought it would for JPG.
That exactness is also why PNGs of text pages can be large, often larger than the PDF page they came from, since the PDF stored a sentence as a sentence and the PNG stores it as several million pixels. Photographic pages fare worst of all, because there is no repetition to find; those are the case for PDF to JPG.
Transparency, and why pages come out white
PNG is the format people reach for when they want a transparent background, so to be clear about what happens here: PDF pages are opaque. A page has a colour, nearly always white, and rendering it produces an image with that colour behind the content, not an empty background. The PNGs you get are fully opaque.
If what you need is a logo or a diagram cut out from its page, this is the wrong route; that is an image-editing job, and the cleaner path is often to take the original artwork rather than a rendering of the page it sits on. If you just want less white around the content, Crop PDF first and then convert. Cropping removes the margin from the page itself, so the rendering never includes it.
Frequently asked questions
How do I convert a PDF to PNG?
Drop the PDF above with PNG already selected, pick a resolution, click Convert. Each page comes out as a lossless PNG, zipped once there's more than one.
Why PNG instead of JPG?
JPG throws away detail to save space, and the first thing it sacrifices is the hard boundary between black type and white paper. PNG keeps every pixel the renderer drew. On photographic pages JPG is far smaller and you'd struggle to see the difference. For type and diagrams, PNG.
Do the images have transparent backgrounds?
They don't. A PDF page has a background of its own, almost always white, and it renders into the PNG like everything else.
Is my PDF uploaded to convert it?
Nothing is uploaded. Your browser rasterizes the pages locally, with the PDF engine it already ships.