How Do You Convert a Pdf to a Jpg

Converting a PDF to a JPG at a resolution high enough to print from.

Direct Answer

Open the PDF, choose Export → JPG, and set the resolution to roughly 300 dpi — the figure print work generally expects. Export and then view the image at full size to confirm small text and fine lines survived. For screen use alone, 150 dpi is enough, and choosing it keeps the file far smaller.

Steps

Ask how the image will be used — a slide on a screen and a printed page need very different pixel counts. The answer sets the resolution before anything else.
Start at 300 dpi for print — this is the usual standard. Going far beyond it enlarges the file without adding visible detail to most documents.
Zoom to 100 percent and read the smallest text — judging at fit-to-window hides soft edges. Check footnotes and table figures at full size.
Reduce if the file is unwieldy — if it is too large to send, export again at 150 dpi. The resolution can be changed at any time because the PDF is untouched.

Frequently Asked Questions

Is 300 dpi always necessary?

Only for print. For a web page, an email attachment or a slide, 150 dpi looks the same on a screen and produces a file a fraction of the size, which matters when sending several pages.

Why is the file so much bigger at higher settings?

Pixel count rises with the square of the resolution. Doubling it gives four times as many pixels, and each one must be stored, so the file grows roughly fourfold before compression is applied.

Can I print from the JPG afterwards?

Yes, if the resolution is high enough. A 150 dpi image prints acceptably at small sizes but looks soft when enlarged, so export at 300 dpi whenever the picture may end up on paper.

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