FAQ
PDF to PNG questions, answered
Everything you need to know about RasterMint's private PDF to PNG workflow, output quality, and current pricing plan.
No. RasterMint runs 100% in your browser. Your PDF files never leave your device — we never upload, store, or access any of your files.
RasterMint uses PDF.js (by Mozilla) to render your PDF directly in the browser, then exports each page as a PNG via the Canvas API. Nothing is sent over the network — it all stays on your device.
Just three steps: 1) Open the converter page and drag-and-drop or select your PDF file. 2) Choose output quality (Standard or Higher Resolution 2x). 3) Download individual PNGs or all pages as a ZIP file.
Yes. RasterMint automatically detects all pages in your PDF and converts each one into a separate PNG image. You can preview each page, download individual images, or get all pages in one ZIP file.
There's no hard limit. However, since conversion happens in your browser, very large files (500+ pages or PDFs with many high-res scanned images) may use significant memory. We recommend processing such files on a desktop computer.
PNG is lossless, so there's no quality loss. Standard mode uses the PDF page's original dimensions. Higher Resolution (2x) renders at double the size — great for zooming, cropping, or printing.
PNG is lossless and supports transparency — best for quality. JPG is smaller but lossy, with slight quality trade-offs. If quality matters, go with PNG. If file size matters more, JPG works.
Core conversion features are completely free, including Standard and Higher Resolution output. We plan to offer a Pro version with batch multi-file processing, custom DPI settings, and an ad-free experience.
Pro is planned at $5/month and will include batch processing for multiple PDFs, custom DPI settings, priority support, and an ad-free experience. Join the waitlist on our pricing page to get notified when it launches!
You can use macOS Preview (File → Export → PNG), but it only handles one page at a time. For multi-page PDFs, open RasterMint in Safari or Chrome — it works natively on Mac with no install required and exports every page at once.
Windows has no built-in PDF-to-PNG converter. You can use the Snipping Tool for screenshots, but that captures only the visible area at screen resolution. RasterMint works in any Windows browser (Edge, Chrome, Firefox) and gives you full-page, high-resolution PNG output.
Yes. Open RasterMint in Safari on your iPhone or iPad. Select your PDF, choose a quality level, and download the PNG images. The entire conversion runs locally in Safari — no app install needed.
It depends on your use case. Standard mode (~72–96 DPI) is fine for on-screen viewing and web use. Higher Resolution (2×) produces ~150–192 DPI output, which is ideal for printing, cropping, or displaying on retina screens. For professional print work, 300 DPI is typical — this will be available in RasterMint Pro.
PNG as a format supports full alpha transparency. However, most PDF pages have a white background baked into the document, so the exported PNG will also have a white background. If your PDF contains elements on a transparent layer, that transparency will be preserved in the PNG.
If the PDF requires a password to open, you'll need to enter it in your PDF viewer first, then save an unprotected copy. RasterMint processes files locally and cannot bypass PDF encryption. If the PDF only restricts printing or copying (but opens without a password), conversion will work normally.
After the page loads initially, the core conversion engine (PDF.js) is cached in your browser. However, you need an internet connection for the first page load. Once loaded, the actual file processing does not require a network connection.
Yes. RasterMint is one of the safest options available because your files are never uploaded to any server. The conversion runs entirely in your browser using JavaScript. You can verify this by opening your browser's Network tab — you'll see zero requests carrying file data during conversion.