To get a high-quality JPG from a PDF, render each page at a resolution that matches how the image will be used, then save it with a high JPEG quality setting. For on-screen use, 150 DPI is usually plenty; for printing or zooming into fine detail, choose 300 DPI. If your page is mostly sharp text or line art, consider PNG instead, since JPEG compression can leave faint smudges around crisp edges.
That short answer hides a few concepts worth understanding, because "high quality" means different things for a social media post, a slide and a print job. This guide explains DPI in plain terms, compares native conversion options, and shows how to convert privately in your browser.
What happens when you convert a PDF to JPG
A PDF page is not a picture. It is a set of instructions: draw this text in this font at this position, draw this line, place this photo here. Those instructions are resolution-independent, which is why PDF text stays sharp at any zoom level.
A JPG, on the other hand, is a fixed grid of pixels. Converting a page means rasterizing it: the converter draws the page onto a grid of a chosen size and saves the result. Once rasterized, text is just colored pixels. It no longer scales cleanly and is not selectable or searchable.
So the two decisions that determine quality are:
- How many pixels the grid has, controlled by DPI.
- How much the JPEG compression discards, controlled by the quality setting.
DPI explained without the jargon
DPI stands for dots per inch. In PDF conversion it really means pixels per inch of the original page. PDF pages are measured in inches (or points, where 72 points make an inch), so DPI tells the converter how many pixels to use for each inch.
Here is what that means for a US Letter page, which is 8.5 by 11 inches:
- 72 DPI gives an image of 612 by 792 pixels.
- 150 DPI gives 1275 by 1650 pixels.
- 300 DPI gives 2550 by 3300 pixels.
An A4 page, about 8.27 by 11.69 inches, comes out at roughly 2480 by 3508 pixels at 300 DPI.
Doubling the DPI doubles the width and the height, so the pixel count roughly quadruples. File sizes grow accordingly, though JPEG compression softens the increase.
Which DPI should you choose
- 72 DPI: thumbnails and quick previews. Good for a small preview on a web page or in a chat. Body text becomes hard to read on high-density screens.
- 150 DPI: everyday screen use. Sharp on most laptop and phone screens, readable when zoomed a little, and a sensible size for email, presentations and documentation. This is the best default for most people.
- 300 DPI: printing and detail. The traditional standard for printed output. Choose it when the image will be printed, when viewers need to zoom into small text, or when you plan to crop a portion of the page and still want it sharp.
More DPI is not automatically better. A 300 DPI image of a page destined for a 400-pixel-wide blog column wastes bandwidth and gets scaled down anyway.
DPI cannot add detail that is not there
If a PDF contains a low-resolution photo or a poor scan, rendering the page at 300 DPI does not make that photo sharper. It only makes a larger image of the same blurry content. Vector text and graphics, however, benefit fully from higher DPI because they are redrawn at the new resolution.
JPEG quality and when to use PNG
JPEG is a lossy format designed for photographs. At high quality settings the losses are nearly invisible in photos, but around sharp edges, such as black text on white, you may notice faint noise called artifacts.
- Use JPG for pages dominated by photos, gradients or scanned images, and whenever small file size matters.
- Use PNG for pages of text, diagrams, charts, or screenshots of interfaces. PNG is lossless, so edges stay perfectly clean, at the cost of larger files for photographic content.
Our PDF to PNG tool offers the same page and resolution choices as the JPG converter if you decide PNG is the better fit.
Native ways to convert PDF to JPG
Preview on a Mac
- Open the PDF in Preview and select the page you want in the thumbnail sidebar.
- Choose File > Export.
- Set the format to JPEG.
- Adjust the Quality slider and the Resolution field. Enter 150 or 300 for good results.
- Save.
Preview exports one page at a time this way, which is fine for a page or two. For a whole document, you would repeat the process for each page.
Windows
Windows does not include a direct PDF-to-image exporter. Common workarounds include taking a screenshot of a page with the Snipping Tool, whose resolution is limited to what your screen displays, or opening the PDF in an app that supports image export. Screenshots are acceptable for a quick share but rarely count as high quality.
Adobe Reader
The free Adobe Reader is designed for viewing, filling and signing. Exporting pages as images is part of the paid Acrobat product. You can take a snapshot of an area in Reader, but its resolution is tied to the current zoom level.
Phones
On iPhone and Android, a screenshot of a PDF page is the native fallback. It captures only what fits on screen at the current zoom, so it is best for short notes rather than full pages you want to reuse.
Converting in your browser, page by page or all at once
Our free PDF to JPG tool renders pages locally in your browser, so the document never leaves your device. It works on desktop and mobile.
- Open PDF to JPG and add your PDF.
- Choose a resolution: 72, 150 or 300 DPI. The default is 150.
- Optionally limit the conversion to specific pages by entering a range like "1-3, 7". Leave it empty to convert every page.
- Adjust the image quality if you want smaller or more pristine files. The default is high.
- Convert. When there is a single page you download one image; with several pages you can download all of them together as a ZIP.
Picking settings for common tasks
- Slide or document screenshot for a presentation: 150 DPI, high quality. If the page is mostly text or charts, consider PNG.
- Social media post of a flyer: 150 DPI is usually enough, since platforms resize images anyway.
- Printing a page as a photo: 300 DPI at high quality.
- Archiving a visual snapshot of every page: 150 DPI keeps the ZIP manageable while staying readable.
- Extracting a detailed map or diagram to crop later: 300 DPI, and consider PNG.
Troubleshooting blurry or huge images
The text looks fuzzy
The DPI is probably too low for how you are viewing the image. Try 150 or 300 DPI. On very high-density displays, 150 DPI can still look soft when zoomed in; 300 DPI solves that.
The file sizes are enormous
At 300 DPI, a multi-page document can produce a large ZIP. Lower the DPI to 150, reduce the quality slightly, or convert only the pages you need.
Colors look slightly different
PDFs designed for print sometimes use color spaces that do not map perfectly to screen colors. Minor shifts are normal. If exact color matters, compare against the original in several viewers.
A page is blank or missing elements
Some PDFs use unusual features, damaged objects or embedded content that renderers handle differently. Try opening the PDF in another viewer to see whether the problem is in the file itself.
I need the text, not a picture
If you want editable text, converting to an image is the wrong direction. Use PDF to Text or PDF to Word instead, and run OCR PDF first on scanned documents.
Going back the other way
Images made from a PDF can be combined into a new PDF again with JPG to PDF. Keep in mind that this produces an image-only PDF without selectable text, which is sometimes exactly what you want, for example to share a document where you do not want text to be copied easily.
Key takeaways
- Converting a PDF to JPG rasterizes each page into a fixed grid of pixels; DPI decides how many.
- 150 DPI suits screens and email, 300 DPI suits printing and zooming, and 72 DPI is for small previews.
- Higher DPI sharpens vector text but cannot improve low-resolution photos or scans already in the PDF.
- Use PNG for text-heavy pages and diagrams, JPG for photos and when file size matters.
- Our in-browser PDF to JPG tool converts selected pages or the whole file at 72, 150 or 300 DPI and bundles multiple pages into a ZIP, all without uploading.