PNG is lossless and keeps transparency, so it is often larger than the same image as JPG or WebP.
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What is a PDF to PNG converter?
A PDF to PNG converter renders each page of a PDF document as a PNG image. PNG is lossless, so the letters, table borders and chart lines on a page keep hard, clean edges with none of the smudging that JPG compression adds. That makes it the better image format for pages of text, slides, diagrams, sheet music, floor plans and screenshots for documentation.
Each page becomes exactly one PNG. A 30-page PDF gives 30 files named after the PDF with the page number, such as slides-page-03.png, zero-padded to the length of the page count so they sort in order. Download All in the list header saves everything as converted-png.zip, the download icon on a PDF's row saves that PDF's pages as a ZIP such as slides-png.zip, and any single page can also be downloaded on its own. Several PDFs can be converted in one go, each one a row in the file list.
Resolution sets the pixel size of every page. PDF measures pages in points, 72 to the inch, so 72 DPI gives small previews, 150 DPI (the default) suits reading on screen, and 300 DPI suits printing and close zooming. A US Letter page is 1275 x 1650 pixels at 150 DPI and 2550 x 3300 at 300 DPI. There is no quality slider, because PNG never discards detail. The trade-off is size: PNG files are larger than JPGs of the same page, and much larger when the page is covered in photos.
Pages are drawn by pdf.js, the open source PDF renderer from Mozilla that Firefox uses, downloaded only when you add the first PDF. Each page is drawn on white, the way it looks in a PDF reader or on paper, so the PNGs have no transparent background. The text is pixels now and cannot be selected or searched, and fonts that are not embedded in the PDF may be replaced with a similar font.
Everything happens client-side, so the PDF is never uploaded. To keep the tab from running out of memory, a PDF over 100 pages or 200 MB is refused, as is a page that would pass 40 megapixels, or 16,384 pixels on a side, at the chosen DPI; that message names the page and suggests a lower resolution. A password-protected PDF is refused with instructions to save an unprotected copy, and a damaged one is reported as unreadable. The tool is free, no signup, with a daily cap on conversions.
How to convert PDF to PNG
Add your PDF
Drop one or more PDFs onto the box, or click to upload. Rendering starts as soon as a file is added. Other file types are turned away with a link to the right converter.
Pick a resolution
Choose 72, 150 or 300 DPI under Resolution. Use 300 DPI when small text or thin lines must stay readable after zooming or printing. Changing it renders every page again at the new resolution.
Check the pages
Each PDF is one row with its status and a size line with the size of the PDF, the number of pages and the combined size of the PNG pages. Press Show 30 pages to list every page with its size and pixel dimensions, and click a thumbnail to open that page large.
Download the PNGs
Use the download icon next to any page to save it alone, the download icon on the PDF's row to save its pages as a ZIP, or Download All in the list header to save every page at once.
Why convert PDF to PNG?
PNG is the better pick over JPG when a page is mostly text or lines. These are the cases where that choice pays off.
Sharp text in documentation and slides
A page image in a help article, a wiki or a slide deck gets read up close. JPG compression leaves faint ringing around dark letters on a light background. PNG stores the rendered pixels exactly, so the text looks the same as it did in the PDF reader at that resolution.
A clean source for editing and cropping
If you plan to crop a chart out of a report, annotate a drawing or mark up a contract page, start from a lossless image. Every save of a PNG keeps the same pixels, while a JPG loses a little more detail each time it is edited and saved again.
Diagrams, plans and scores
Floor plans, circuit diagrams and sheet music are built from thin lines and flat areas, which PNG compresses well. When the page is mostly photographs instead, converting the PDF to JPG gives much smaller files that look almost the same.
PDF vs PNG: what you keep and what you lose
| PNG | ||
|---|---|---|
| Pages | Many pages in one file. | One page per image file. |
| Text | Selectable and searchable when the PDF has a text layer. | Rendered pixels. Not selectable or searchable. |
| Scaling | Vectors and text redraw sharply at any zoom. | Fixed pixel size, set by the DPI you choose. |
| Compression | Mixed content: text, vectors and embedded images. | Lossless. Every rendered pixel is kept exactly. |
| Background | Shown on white in readers. | Drawn on white here, so no transparency. |
| Typical file size | Often small for text documents. | Small for plain text pages, large for photo-heavy pages. |
| Best for | Printing, signing, searching and archiving documents. | Documentation, slides, diagrams and images you will edit. |
Which DPI to use for PDF to PNG
Every PDF page has a physical size. The DPI setting turns inches into pixels, and with a lossless format like PNG, more pixels means a bigger file.
| Resolution | US Letter page | A4 page | Good for |
|---|---|---|---|
| 72 DPI | 612 x 792 px | 595 x 842 px | Thumbnails, page pickers and previews in a file list. |
| 150 DPI (default) | 1275 x 1650 px | 1240 x 1754 px | Screen reading, help articles, slides and wikis. |
| 300 DPI | 2550 x 3300 px | 2480 x 3508 px | Printing, zooming into fine print or thin lines, and cropping details. |
Each step from 72 to 150 to 300 DPI roughly doubles the width and the height, so the pixel count grows about four times per step. PNG has no quality slider to claw that back, which is why a 300 DPI PNG of a busy page can run to several megabytes.
Very large pages, such as posters and engineering drawings, can pass the limit of 40 megapixels per page at 300 DPI. The converter checks every page before rendering any of them and tells you which page is too big, so dropping to 150 DPI is a quick fix.
Privacy and security
- Your PDF is rendered client-side with pdf.js inside this tab, and it is never uploaded.
- The renderer and its decoders are fetched from this site only when you add the first PDF.
- A password-protected PDF is refused. The converter does not try to crack or remove the password.
- The daily usage check sends the tool name, a device identifier and your sign-in token if you are signed in, and nothing from the PDF.
- After a batch, the page records the number of files, their total bytes and the output format. It never sends file names or page images.
Key Features
Lossless page images
Crisp text and lines with no compression artifacts
72, 150 or 300 DPI
Preview, screen or print resolution for every page
One PNG per page, in order
Zero-padded page numbers in each file name
Download All as ZIP
Every page in one file, one PDF's pages from its row, or any page on its own
Frequently Asked Questions
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