The fastest way: Preview's Export function

Open your PDF in Preview (the app that comes built into every Mac). Click File in the menu bar, then Export. A dialog box opens. Near the bottom, you'll see a dropdown that says Format — click it and select JPEG. Choose where to save the file, name it, and click Save. That's the whole process.

Preview converts the entire PDF to a single JPEG image. If your PDF has multiple pages, Preview flattens them into one image stacked vertically — useful if you want one long image, but not if you need separate files for each page. The quality slider in that same Export dialog lets you choose between smaller file size and sharper image; the default setting works fine for most purposes.

Key Takeaways

  • Preview, which is already on your Mac, can convert a PDF to JPEG in three clicks using File > Export > Format > JPEG.
  • Preview combines all pages of a multi-page PDF into a single tall JPEG image, not separate files.
  • If you need each page as its own JPEG file, you can export as TIFF first, then convert each page separately, or use a command-line tool like ImageMagick.
  • The quality slider in Preview's Export dialog controls file size and sharpness; the default setting is usually sufficient.
  • Online converters exist but require uploading your PDF to a third-party server, which poses privacy risks if the document contains sensitive information.

Converting multi-page PDFs one page at a time

If you need each page as a separate JPEG file, Preview requires an extra step. Open your PDF in Preview, then go to Tools in the menu bar and select Split PDF. This creates a separate PDF file for each page. Then export each one individually to JPEG using the method above.

This approach takes longer but gives you individual image files you can use separately. It's useful if you're scanning documents and need each page as its own image, or if you're preparing images for a website where you want to control them individually.

Using ImageMagick from the command line

If you're comfortable with the Terminal app, ImageMagick is a free tool that converts PDFs to JPEG faster than Preview, especially for large files. First, install it using Homebrew (a package manager for Mac). Open Terminal and type brew install imagemagick, then press Enter. Homebrew will read and install it.

Once installed, navigate to the folder containing your PDF in Terminal. Type convert yourfile.pdf yourfile.jpg and press Enter. ImageMagick converts the PDF to JPEG automatically. For multi-page PDFs, it creates separate numbered files: yourfile-0.jpg, yourfile-1.jpg, and so on. This method is faster than Preview for large PDFs and automatically handles multiple pages without extra steps.

ImageMagick also lets you control quality and size with additional commands, but the basic syntax above works for most conversions. If you don't have Homebrew installed, you'll need to install it first — the Homebrew website has clear instructions for Mac.

Why JPEG instead of other image formats

JPEG compresses images heavily, making file sizes small — useful if you're emailing the image or uploading it somewhere with size limits. The trade-off is that JPEG loses some detail each time you save it, so it's not ideal for documents with small text or fine details. If you're converting a PDF with tiny print, PNG or TIFF preserve more sharpness, though they create larger files.

JPEG works well for photographs, scanned documents that don't need archival quality, and images you plan to view on screen. If you need the image for printing or long-term storage, consider PNG or TIFF instead — Preview can export to both formats using the same Export dialog.

Privacy and security when converting files

Converting a PDF to JPEG on your own Mac keeps the file on your device. Online conversion tools (websites that convert files for you) require uploading your PDF to their servers. If your PDF contains sensitive information — financial records, medical documents, personal identification — uploading it to a third-party service creates a privacy risk. The website's privacy policy may allow them to store, analyze, or share your data.

Using Preview or ImageMagick keeps everything local and private. Your file never leaves your computer. This is especially important if you're converting documents for work, documents containing others' personal information, or anything you wouldn't want stored on someone else's server.

Troubleshooting common conversion problems

If your JPEG looks blurry or pixelated, the quality slider in Preview's Export dialog was set too low. Open the PDF again, go to File > Export, and move the quality slider to the right before saving. If the text is still hard to read, your original PDF may have been low-resolution — there's no way to recover detail that wasn't there to begin with.

If Preview won't open your PDF, the file may be corrupted or password-protected. Try opening it in a different app first (like Adobe Reader, which is free) to confirm it's readable. If your PDF is password-protected, you'll need to unlock it before converting. ImageMagick can sometimes convert password-protected PDFs if you provide the password in the command, but Preview cannot.

If ImageMagick produces an error message about missing libraries, your installation may be incomplete. Reinstalling it with brew reinstall imagemagick usually fixes the problem.

When to convert and when to keep the PDF

Convert to JPEG when you need to share an image, embed it in a document or website, or use it in an app that doesn't read PDFs. Keep the PDF if you need to preserve the original formatting, search text within the document, or maintain the file for legal or archival purposes. PDFs are also smaller than JPEG for text-heavy documents.

If you're unsure whether to convert, keep both versions. The conversion is fast enough that you can create a JPEG copy without deleting the original PDF. This way you have the JPEG for sharing and the PDF for your own records.

Frequently Asked Questions

Can I convert just one page of a multi-page PDF to JPEG?

Yes. Open the PDF in Preview, go to Tools > Split PDF to create individual PDFs for each page, then export only the page you need. Alternatively, use ImageMagick with the command convert yourfile.pdf[0] output.jpg to convert only the first page (replace [0] with [1], [2], etc. for other pages).

Will the JPEG look exactly like the PDF?

It will look very similar, but JPEG compression may soften edges slightly and reduce sharpness compared to the original PDF. For documents with small text or fine lines, the difference is noticeable. PNG or TIFF preserve more detail if that matters for your use.

What if my PDF is password-protected?

Preview cannot open password-protected PDFs. You'll need to unlock it first using Adobe Reader or another PDF app that supports the password. Once unlocked, you can convert it to JPEG using Preview or ImageMagick.

Is there a way to batch convert multiple PDFs at once?

Preview doesn't have a batch function, but ImageMagick can convert multiple files with a single command. In Terminal, type convert *.pdf output.jpg to convert all PDFs in a folder. ImageMagick creates numbered output files for each input PDF.

Does the file size of the JPEG matter for email?

Yes. Most email providers limit attachment size to 20–25 MB. A JPEG from a single-page PDF is usually well under that, but a multi-page PDF converted to one tall JPEG can be large. If file size is a problem, lower the quality slider in Preview's Export dialog before saving.