After the page loads, your browser reads the selected PDF with the File API. PDF.js renders each page to a canvas, and the canvas is exported as a PNG image.

The selected PDF does not need to be sent as a request body to a conversion endpoint. The entire pipeline runs inside your browser tab using JavaScript and the Canvas API.

Browser-based PDF to PNG conversion is a practical default for everyday documents that contain private or business-sensitive information.

• Invoices and receipts
• Contracts and signed agreements
• Medical, school, or insurance forms
• Internal reports and presentations

If you want to confirm that RasterMint does not transmit your file, open the browser Developer Tools (F12 or Cmd+Option+I), switch to the Network tab, and convert a PDF. You will see no requests containing file data during the conversion process.

This is different from upload-based tools, where you would see a multipart form upload to a server endpoint followed by a download of the converted images.

Desktop PDF tools also keep files local, but they require installation, updates, and often a paid license. RasterMint gives you a no-install alternative that runs in any modern browser.

The trade-off is that very large PDFs (hundreds of high-resolution scanned pages) may perform better in a native desktop application with direct memory access. For most documents under 100 pages, browser-based conversion is fast and reliable.