PDF to PNG
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When PNG is the right format

PDF to PNG is the right conversion when the visual content of the page would suffer from JPG compression. The two clearest cases: pages with text, schematics with thin lines, diagrams with sharp edges, screenshots, or any drawing where edges matter. JPG, by design, smudges those edges to save file size — that's the trade-off it makes. PNG is lossless, which means each page comes out exactly as it rendered in the PDF: text stays sharp, lines stay crisp, colour boundaries stay exactly where they should.

The other case is transparency. PNG supports transparent areas; JPG doesn't. If you're going to overlay the page extracted from the PDF onto a coloured background — in a presentation, in a design tool, in a banner — PNG is what lets the background show through where the page didn't have content.

Picking quality (and what it actually means here)

The tool offers three quality levels — Fast, Default, High Quality. Each one renders the PDF page at a higher resolution than the one before, which means a more detailed image and a larger file. Because PNG is lossless, "quality" in this tool maps to render resolution, not compression strength.

• Fast — small file, suitable for thumbnails or screen-only sharing.
• Default — the safe middle. Looks good on retina laptops, on phone screens, in any normal viewing situation.
• High Quality — for printing, for situations where someone might zoom in to inspect detail. The files are noticeably bigger, sometimes by 4-5×, but every pixel of the original page is preserved.

If the resulting image looks pixelated when you zoom in, re-run at the next quality level up. There's no quality loss in the conversion — just a choice of how high a resolution you want to capture the page at.

JPG or text instead

If your PDF is mainly photographs, full-page captures of natural images, or anything where some compression artifacts wouldn't be noticed — pdf-to-jpg is the better choice. JPGs are 5-10× smaller than equivalent PNGs for photo content and the visual difference is hard to spot.

If you only need the text from a PDF — to paste into a document, to search, to feed into another tool — converting to image makes that text harder to use. pdf-to-txt pulls the actual text out and gives you something selectable. Faster than image conversion, and the result is what you actually wanted.

Practical notes

• One PNG per page. A 30-page PDF gives you 30 separate PNG files, packaged in one ZIP so you don't get 30 download dialogs.
• If the PDF has a password, unlock it first. Run it through unlock-pdf before converting.
• PNGs from PDFs are still raster images, not vectors. If your source PDF was made from a vector original (e.g., an Illustrator export, a CAD drawing), the PNG is a frozen-resolution copy. Zooming far in will show pixels eventually. For preserving vector data, the PDF itself is the right format.
• Long PDFs at High Quality use a lot of memory. If you're converting a 200-page document at the highest setting on a phone, the browser may run low on memory. Drop to Default or use a desktop browser.
• Going the other direction. To take PNG images and combine them into a PDF, see png-to-pdf.

What happens to your file

Everything happens in your browser. The PDF goes in, the PNGs come out, nothing is uploaded. Open DevTools and watch the Network tab while the conversion runs — you'll see no requests with file content going out. The original PDF on your disk is untouched; the PNGs are a fresh download you save where you want.