FAQ
PDF to PNG Converter FAQ
Answers about no-upload conversion, DPI quality, multi-page export, ZIP download, supported devices, and pricing.
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 PDF to PNG converter page and drag-and-drop or select your PDF file. 2) Choose output quality (72 DPI, 150 DPI, or 300 DPI). 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. RasterMint supports 72 DPI for quick previews, 150 DPI for readable document images, and 300 DPI for print-quality PNG output.
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 72 DPI, 150 DPI, and 300 DPI output. We plan to offer a Pro version with batch multi-file processing, saved presets, and an ad-free experience.
Pro is planned at $5/month and will include batch processing for multiple PDFs, saved presets, 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. 72 DPI is fine for quick previews, 150 DPI is ideal for sharing and readable document images, and 300 DPI is best for print-quality output. Higher DPI creates larger files and may be slower on large PDFs.
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.