PDF to PNG: Choose DPI and Download ZIP Batches

2026-11-13

Choose 72, 150, or 300 DPI for PDF pages, predict pixel dimensions, and download independent ZIP batches without losing track of selected pages.

Use PDF to PNG when you need a picture of a saved PDF page. It renders the visible page on white and does not extract the original embedded image, preserve selectable text, or perform OCR. Start at the default 150 DPI, then choose a lower or higher resolution for your destination.

Choose DPI for the output you need

72 DPI creates smaller screen images and is a practical first choice on a resource-limited phone.
150 DPI is the default balance between detail, file size, and browser memory.
300 DPI creates more pixels when the page fits the limits. It cannot restore detail that is missing from an already blurred scan.
The displayed pixel dimensions are the export dimensions. A Retina screen or device pixel ratio does not multiply them again.

Predict pixels using the visible page size

For a PDF measured in points, pixels are approximately visible points × DPI ÷ 72. The converter uses the actual visible page viewport, including CropBox, UserUnit, and saved rotation, then checks the final integer dimensions. Different pages in one file can produce different pixel sizes.

A standard Letter page is 612 × 792 points. At 72 DPI it exports 612 × 792 pixels.
At 150 DPI the same Letter page exports 1275 × 1650 pixels.
At 300 DPI it exports 2550 × 3300 pixels.
A saved 90-degree rotation swaps the output width and height. A CropBox can make the visible output smaller than the full MediaBox.

Download the original Letter DPI demo PDF to try all three settings. It contains our own test text, border, and blue rectangle. Check that the rectangle and text remain visible at the chosen size.

The PNG contains a pHYs resolution record for the selected DPI. Some image and printing software ignores that record, so check both the actual pixel dimensions and the intended print size in the destination application. Changing the resolution record alone does not invent new image detail.

Choose physical page positions

Page range uses physical positions starting at 1, not a page label printed inside the PDF. Enter 5,1,3-5 to export positions 1,3,4,5 in document order with duplicates removed. Chinese commas and an en dash are accepted, so 1，3，5–8 is normalized. A reversed, unfinished, or out-of-range item blocks conversion instead of partly applying the range.

Download each independent ZIP before continuing

One selected page produces a PNG. More than one selected page produces independent ZIP batches, limited to 10 PNGs and 32 MiB of PNG data in each batch, plus a small bounded ZIP directory. Download the current batch, then explicitly choose Continue. The next batch does not start by itself.

Try the original 23-page demo PDF at 72 DPI. These simple pages normally form batches of 10, 10, and 3. More complex images may hit the byte budget earlier and produce smaller batches. Every ZIP can be extracted independently; these are not .z01 multi-volume archives.

Continuing releases the previous in-memory download link. The summary retains page lists and sizes, not every past ZIP. Regenerate earlier pages if you forgot to save a batch. Generated means the browser produced a result, not that the website has confirmed the file was saved on your device.

Respond to limits and failed pages

The input limit is one PDF up to 25 MiB and 100 pages. Encrypted files, including empty-opening-password restrictions, and XFA forms are not supported.
Each output page must fit within 4096 pixels per side and 10,000,000 total pixels. An oversized page is blocked before a full-size canvas is allocated. The converter does not silently lower your DPI.
Select fewer pages or choose 72 DPI if your browser runs short of resources. A single PNG over 32 MiB is rejected rather than hidden inside an oversized ZIP.
A failed page pauses the job. Retry that page, explicitly skip it, or cancel. Completed pages in a partial batch are labeled and remain downloadable. Skipped and unexecuted pages appear in the summary.

Save on a phone and recover after interruption

Tap the current PNG or ZIP download link. If the browser opens a preview, use its Save or Share → Save to Files action. Choose another file or Clear to release tool references; that does not delete files already saved or securely erase all browser memory.

A browser may suspend or terminate a tab in the background. Keep the tab in the foreground while converting and save each completed batch. The tool does not store your PDF or results in persistent browser storage, so a discarded or reloaded tab cannot resume the old document. Select it again and export the remaining physical pages.

The output preserves supported saved visible appearances, not unsaved edits in another viewer, interactive form behavior, attachments, clickable links, or digital-signature validity. Check the representative text, colors, and crop of your own document. Real iPhone and Android resource limits and saving behavior require device testing; a desktop mobile viewport is not that evidence.