PDFimage

PDF to PNG converter

Render PDF pages as lossless PNG images — ideal for slides, diagrams and text you want crisp. Go up to 600 DPI for high-resolution output, or turn on a transparent background. Nothing is uploaded.

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How high can “high resolution” go?

Pixel count grows with the square of DPI: double the DPI, four times the pixels. Try it.

8.27 in × 150 = 1,240 px

11.69 in × 150 = 1,754 px

2.2 megapixels per page

Email, messaging, web uploads and reading on a phone.

The zoom square shows the grid of pixels one letter gets — more DPI, more pixels to draw its curves.

How to convert PDF to PNG

  1. Drop a PDF.
  2. Choose a resolution — 200 DPI is preselected for sharp text.
  3. Tick “Transparent background” if you want to place the page over something else.
  4. Convert and save.

PNG or JPG?

PNGJPG
CompressionLosslessLossy (adjustable)
Text and linesPerfectly crispSlight halo at low quality
Scanned photosVery large filesMuch smaller
TransparencyYesNo

Transparent background, explained

Most PDFs have no painted background — the white is just “paper”. With transparency on, those areas stay see-through. PDFs that draw a white rectangle behind everything (common in exports from Word or PowerPoint) will still come out white.

Questions

Is my PDF uploaded?

No. pdf.js, the PDF engine used by Firefox, runs inside this page and draws each page on a canvas in your browser. The file never leaves your device.

What DPI should I choose?

150 DPI for sharing and reading on screens, 200 for crisp text, 300 for printing at actual size. 600 is for archiving and is capped by the browser’s canvas limit on large pages.

Is there a size limit?

There is no upload limit because nothing is uploaded. Each rendered page is capped at 16 megapixels (the iPhone Safari canvas limit) — an A4 page at 300 DPI is 8.7 MP, so it fits; at 600 DPI the page is automatically rendered at about 406 DPI and the result tells you so.

Why are PNGs so much bigger than JPGs?

Lossless compression can’t discard detail. Text pages compress well; scanned photos don’t. Use PDF to JPG for scans.