PDF to PNG Converter

This tool converts the pages of a PDF into PNG images, one lossless image per page, without the file leaving your browser. It is for people who need a page as a sharp picture: a diagram for a slide deck, a chart for a report, a page of a manual for documentation, or a high-resolution image of a form to print or annotate.

Each page is drawn by pdf.js, the open-source PDF renderer maintained by Mozilla and built into Firefox. pdf.js paints the page onto an invisible canvas at the resolution you pick, and your browser saves that canvas as PNG. PNG compression is lossless, so every rendered pixel is stored exactly: thin lines and small text stay as crisp as the renderer drew them, with none of the smudging JPG compression adds around sharp edges. That is why PNG is the usual choice for pages of text, line art and screenshots.

Resolution is chosen in DPI (dots per inch). PDF measures pages in units of 1/72 inch, so the image size is the page size × DPI ÷ 72. A US Letter page (612 × 792 units) becomes 612 × 792 px at 72 DPI, 1275 × 1650 px at 150 DPI and 2550 × 3300 px at 300 DPI; an A4 page is 2480 × 3507 px at 300 DPI. Choose 72 DPI for small previews, 150 DPI for on-screen use (the default), and 300 DPI for print or when you want a high-resolution PNG you can zoom into. The pixel size of page 1 is shown before you convert.

Two things to know. First, the background is white: the tool paints each page white before drawing it, so areas of the PDF where nothing is drawn — which a PDF treats as transparent — come out white, not transparent. Second, the result is a picture. Text becomes pixels that cannot be selected, searched or copied; links and form fields stop working; bookmarks, attachments and hidden comment text are not carried over. Anything visible on the page, including annotation marks and filled-in fields, is flattened into the image.

Lossless has a cost in size. A page that is mostly text on white usually compresses well, but a page with photographs produces a PNG many times bigger than the same page as JPG. If you need small files for email or the web, use PDF to JPG instead.

Limits exist to keep your browser tab alive: up to 200 pages and 1,000 megapixels per conversion, and no single page over 100 megapixels or 16,384 px on a side. If a request goes over, the message names the page and the lower resolution that will fit. Password-protected PDFs need to be unlocked first — open the file with its password in a PDF reader, save an unprotected copy, and convert that.

Everything happens locally: the PDF is read into your browser's memory, rendered and encoded there, and offered back as downloads. In your browser's developer tools, the Network tab shows no request carrying your file.

1. The file's first bytes are checked for the %PDF- header, so a renamed image or document is named for what it really is. Files over 200 MB are refused. 2. pdf.js opens the PDF and reports each page's size in PDF units (1/72 inch), rotation applied. 3. The pages you selected (All, or a range like 2-4, 7) are checked: at most 200 per conversion. 4. Pixel size per page = width × DPI ÷ 72 by height × DPI ÷ 72, rounded down. Pages over 100 megapixels or 16,384 px per side, and totals over 1,000 megapixels, are refused before rendering, with a resolution that fits. 5. Page by page, a canvas of that size is filled white, pdf.js draws the page onto it, and canvas.toBlob("image/png") encodes it losslessly. The canvas is released before the next page. 6. Files are named after the PDF with a zero-padded page number — slides.pdf page 2 becomes slides-page-02.png — so they sort in order. Download each, or all of them as a ZIP made in the browser.