Files are processed in your browser, not uploaded. Privacy →
Deckle
Open a PDF
Skip to guide

PDF to images

How to make small JPG previews of PDF pages

By DeckleUpdated

To make small JPG previews of PDF pages, open PDF to JPG, set Resolution to Screen, set JPEG quality to Smaller, choose the pages to preview, then choose Export images. You get one compact JPG per page, ready for a chat message, a listing or a page of thumbnails. The PDF itself is not changed.

PDF to JPG

A preview needs a size and a reading purpose

Selected page

Export the page that readers need to recognise

Saved JPG

Check pixel dimensions, file size and small labels

Lower resolution can lose useful detail

Conceptual comparison · a lightweight preview is not a substitute for the readable source document.

How to create JPG previews of PDF pages

  1. Open PDF to JPG and choose your PDF, or drop it onto the page.
  2. Under Resolution, choose Screen (72 DPI) for thumbnails, or Standard (150 DPI) if people need to read the text.
  3. Under JPEG quality, choose Smaller.
  4. Under Pages, choose Choose pages and type the pages you want to show, such as 1-3.
  5. Check the summary, for example "3 images · 72 DPI · JPG · 75% JPEG quality", then choose Export images.
  6. Download the images and open one at the size it will be shown.

The result screen lists every JPG with its name, so you can download a single preview or use Download all for a ZIP. A single page gets one Download image button.

Pick a preview size

A preview has a job: either to show what a document looks like, or to let someone read part of it without opening the PDF. Those need different sizes.

Preview job Resolution JPEG quality A4 page in pixels
Thumbnail in a list or gallery Screen Smaller about 595 × 842
"First page" image on a web page Screen or Standard Smaller or Balanced 595 × 842 or 1240 × 1754
Readable page in a chat or email Standard Balanced about 1240 × 1754

At Screen, headings and layout are clear but body text in a typical 10- or 11-point font is hard to read. If the preview is meant to be read, use Standard.

Example: you are posting a 48-page product catalogue to a team channel. Export pages 1-2 at Screen and Smaller for a quick look at the cover and contents. If someone asks about a price on page 31, export that one page at Standard and Balanced so the small print is legible.

Keep the preview set small

Every selected page becomes a file, so think about how many the recipient will open. A cover, the contents page and one representative inner page usually tell people what the document is. Typing 1, 2, 17 exports three previews from anywhere in the file; the images are named with their page numbers, such as catalogue-017.jpg, so the source page is never lost.

Previews are pictures. Text in them cannot be searched or copied, and links do not work. Send the PDF as well when people need the full document; a preview is a way into it, not a replacement.

Check the real file size

The settings shown before export are a plan; the downloaded file is the fact. Page content changes the size a great deal: a page of black text on white compresses much more than a page with a full-bleed photograph. Look at the file sizes in your downloads folder before attaching them. If a preview is still too large for its destination, see why a PDF to JPG file is too large.

Tips

  • Start with Screen and Smaller. Move up only if text needs to be readable.
  • Choose meaningful pages. The cover alone rarely shows what is inside; add a contents or summary page.
  • Rename before sharing. catalogue-cover.jpg tells people more than catalogue-001.jpg.
  • Use PNG for previews of diagrams. Sharp line work stays clearer as PNG; see PDF to PNG or JPG.

Other ways to make PDF previews

  • Quick Look on a Mac. Selecting a PDF in Finder and pressing Space shows a preview, but it does not save an image file.
  • A screenshot. Fast for one page, but the size depends on your screen and zoom. See export or screenshot.

Frequently asked questions

What is the smallest preview I can make?

Screen with Smaller gives the smallest images Deckle produces: about 595 × 842 pixels for an A4 page at 75% quality.

Can I make previews of only the first page?

Yes. Choose Choose pages, type 1, and choose Export images.

Can I make previews of several PDFs at once?

No. PDF to JPG takes one PDF at a time. Export each document in turn.

Will the preview show the whole page?

Yes. Each image is the full page on a white background. Crop it in an image editor if you only want part of it.

Related tools

Sources