How to convert
- Add one or more PDFs.
- Choose 72, 150 or 300 dpi.
- Click Convert to PNG and wait for the pages to render; the progress bar counts them.
- Download each image or all of them as a ZIP.
When PNG is the right choice
PNG stores every pixel exactly. For pages of text, tables, charts, line drawings and screenshots, that means crisp edges with no smudging, which matters when someone will zoom in, when the image will be edited further, or when it goes into a document where a slightly soft JPEG would look poor next to real text. PNG files are larger than JPEGs of the same page, often three to ten times larger for pages with photos, so for photo-heavy pages PDF to JPG is usually the better trade.
Resolution and size
- 72 dpi: about 595 × 842 px for an A4 page. Small text is hard to read; use for thumbnails.
- 150 dpi: about 1240 × 1754 px. Sharp on a typical screen.
- 300 dpi: about 2480 × 3508 px. Print quality and detail for diagrams; files are large.
A text-only page at 150 dpi is typically a few hundred kilobytes as PNG, because large white areas compress well. A page with a full-bleed photo can reach several megabytes.
Uses
- Slides and documents. Paste a chart or table page into a presentation without the softness of a JPEG.
- Documentation and help articles. Page images with crisp text read better.
- Image editing. Start from a lossless image so edits do not stack compression artefacts.
- Archiving a visual copy alongside the PDF, for systems that only preview images.
What the images do not keep
Text in an image is pixels: it cannot be selected, searched or read aloud, and links and form fields do not work. If accessibility matters, publish the PDF or the source document as well. The page background is rendered white, the way it prints; PDF pages have no transparency in normal viewing, and the PNGs match what you see.
Transparent images
If you need a transparent PNG, for example a logo or a signature taken from a PDF, convert the page to PNG here and then remove the white with the logo background remover, which keeps enclosed areas intact and runs in your browser too.
Large documents
Pages render one at a time to keep memory low, and very large jobs prompt with an estimate before starting. Cancel stops immediately. The free version handles PDFs up to 50 MB and five at a time; PDF Pro removes the limits.
On a phone
PDF to PNG runs on phones too. Because PNG files are larger, converting many pages at 300 dpi can fill a phone's downloads quickly; choose 150 dpi unless you need print quality. Download all as a ZIP, then open it in Files (iPhone) or a file manager (Android) to extract the images.
Getting the sharpest result
Text in a PNG is only as sharp as its resolution. If you will display the image at a fixed width, say a 1200-pixel-wide blog column, choose the resolution that gives about that width: 150 dpi for an A4 page. Rendering larger and scaling down in an editor gives slightly smoother text than rendering at exactly the target size; rendering smaller and scaling up makes it blurry. Check a page with the smallest text before converting a long document.
PNG and JPG side by side
| A4 page, 150 dpi | PNG | JPG, quality 85 |
|---|---|---|
| Typed text | 150–400 KB, perfectly sharp | 200–350 KB, slight softening around letters |
| Chart or diagram | 100–300 KB, crisp lines | 200–400 KB, faint halos on lines |
| Full-page photo | 2–5 MB | 300–700 KB, looks the same |
Typical ranges, not guarantees. The pattern is consistent, though: PNG wins for text and lines, and JPG wins for photographs.
Naming and order
Images are named after the PDF with the page number, zero-padded so that page 10 sorts after page 9 in every file manager: manual-page-09.png, manual-page-10.png. That keeps a long set of pages in order when you insert them into slides or upload them in sequence.
PNG is supported by every image viewer, browser and office application, so the images open anywhere without conversion.
If you only need one or two pages, split them out first; converting fewer pages is quicker and keeps your downloads tidy.
Privacy: the file stays on your device
Online PDF services upload your document to their servers, process it there and keep it for a while. This tool does the work in your browser. The file is read into the page's memory, processed by open-source libraries (pdf-lib for editing and pdf.js for rendering) in a background worker, and the result is offered back as a download. Nothing is sent anywhere, there is no account, and closing the tab discards everything. You can check it: open your browser's developer tools, watch the Network tab while you run the tool, and you will see no upload. After the page has loaded once it also works offline.