How to convert a PDF to JPG images

What conversion really does

A PDF page is a set of instructions: place this text in this font here, draw this image there. Converting to JPG follows those instructions on a canvas and saves the result as a photo-style image. The tool renders the page, it does not pull anything out of the file, so every letter, line and logo ends up as pixels.

Two consequences follow. The text in the JPG can no longer be selected, searched or copied, and the image has a fixed size in pixels, so enlarging it later makes it blurry. Decide on the resolution before converting, not after.

Choose the resolution (DPI)

Resolution decides how many pixels each page gets. On an A4 page, 72 DPI gives roughly 595 by 842 pixels, 150 DPI about 1240 by 1754, and 300 DPI about 2480 by 3508. The options in PDF to JPG are 72, 150, 200 and 300 DPI.

Use 72 DPI for small thumbnails and quick previews, 150 DPI for on-screen reading, presentations and websites, 200 DPI when small text must stay legible, and 300 DPI when the image will be printed or when you plan to run OCR on it later. Doubling the DPI multiplies the pixel count by four, so file size and memory use grow quickly.

JPG quality and file size

JPG is a lossy format: it discards fine detail to keep files small. A higher quality setting keeps edges cleaner and produces a larger file, a lower one shrinks the file but adds visible blocks and fuzz around text and thin lines.

Pages of photographs tolerate lower quality well. Pages of small black text on white are the opposite, because compression noise shows up right next to the letters. If a page is mostly text, raise the quality or the DPI rather than accepting smudged glyphs.

Steps to convert pages

The conversion runs in your browser, so the PDF is not uploaded. Very large files depend on your device memory: the tool refuses files above 200 MB and PDFs above 2,000 pages.

• Open PDF to JPG and add your PDF.
• Choose which pages to convert: all of them or a range such as 2-5.
• Pick the resolution (72, 150, 200 or 300 DPI) and the JPG quality.
• Start the conversion. One page gives a single JPG, several pages give a ZIP with one image per page.
• Open a few images at full size and check that the smallest text is readable before using the batch.

When PNG is the better choice

PNG is lossless, so screenshots of interface designs, charts, diagrams and pages with sharp text stay crisp without compression artifacts. The price is a larger file, especially for photographs. PDF to PNG works the same way as the JPG version but without a quality slider.

Choose JPG for photo-heavy pages and anything that must stay small, and PNG for line art and text you want to keep clean. If you need WebP as well, PDF to Images lets you choose between JPG, PNG and WebP.

Extracting embedded images instead

Sometimes you do not want the page, only the photo on it. Extract Images from PDF finds the images embedded in the file and saves them, as PNG or as the original JPEG where possible, in a ZIP. You can skip tiny images such as icons and decorations with a minimum size.

This only works for real embedded images. Vector graphics and text are not images, so a logo drawn as vectors will not appear. In that case convert the page instead.

Common problems

If a page fails or the tool warns about size, the page is too large for the browser canvas at that DPI. Lower the resolution or convert fewer pages at a time. A blurry result usually means the DPI was too low for the way you use the image.

If the images are meant to become a document again, remember that they are pictures. Rebuild a PDF from them with JPG to PDF, and run OCR PDF afterwards if you need selectable text. If the aim is only a smaller PDF, Compress PDF is a better route than converting pages to images.