PDF to JPG - Convert PDF Pages to Images Free

What This Converter Does

This tool opens your PDF with pdf.js — the PDF engine Firefox itself uses to display documents — paints each page you selected onto a canvas, and encodes that canvas as a JPG. All of it happens inside this browser tab. That is the part worth pausing on, because it is not how the category normally works: the well-known PDF-to-JPG services receive your file onto a server, convert it there, and hand back a download link. The documents people convert are contracts, payslips, medical letters, bank statements and scans of ID, and every one of those uploads is a copy of a private document sitting on infrastructure you do not control, under a retention policy you did not read. Here the file is read by the page, rendered, and dropped when you close the tab. Resolution is the setting that matters most and the one most converters hide. A PDF is a vector format whose internal unit is 1/72 inch, so a page rendered at scale 1 comes out at 72 DPI — the size the document declares, and too coarse for body text. 150 DPI doubles that in each direction and is the right default for anything meant to be read on screen. 300 DPI is print and OCR resolution: four times the pixels of 150 DPI, and roughly four times the file size, which is why it is a choice rather than the default. Pages are rendered one at a time and encoded before the next one starts, so a 200-page document does not have to fit in memory all at once. Each page is painted onto a white background first — PDF pages have no background of their own, and without that fill a JPG comes out with black paper.