Thumbnails

PDF Thumbnail Generator

Choose a PDF, set the thumbnail width and format, and render every page — or just the pages you pick — as image thumbnails. Download each one or all of them as a ZIP in page order.

Back

1. PDF & options

Local rendering

Pages

2. Thumbnails

PNG / JPG
Choose a PDF to begin.

Thumbnails are rendered by the built-in PDF engine in this tab. Nothing is uploaded.

About this tool

About PDF Thumbnail Generator

PDF Thumbnail Generator renders the pages of a PDF as small PNG or JPG images at a width you choose. Each thumbnail shows its page number, pixel size and file size, can be downloaded on its own, and all successful thumbnails can be downloaded together as a ZIP in page order.

Thumbnails are useful for document libraries, previews on a website, slide overviews and quick visual checks. Making them locally keeps private documents on your device.

How to use

Step by step

  1. Choose a PDF file.
  2. Pick PNG or JPG and set the thumbnail width in pixels.
  3. For JPG, set the quality.
  4. Choose all pages or enter page ranges.
  5. Press Generate thumbnails, then download single images or the ZIP.
Key features

What it offers

  • PNG or JPG output with adjustable JPG quality
  • Exact width from 16 to 2,000 pixels; height follows each page
  • All pages or custom ranges such as 1-3, 5
  • Page number, dimensions and file size for every thumbnail
  • ZIP download in page order, containing only successful pages
  • Clear errors for invalid ranges, widths and unreadable PDFs
Best practices

Tips for best results

  • Use 150–300 px wide for gallery or listing previews.
  • Choose PNG for text-heavy pages and JPG for photographs.
  • Generate only the pages you need for long documents.
  • Check the total size before uploading thumbnails to a website.
Benefits

Why people use it

Exact size

Every thumbnail is the width you set.

Ordered ZIP

Files named and sorted by page.

Transparent

Size and dimensions shown per page.

Private

Rendered in your browser.

FAQ

Common questions

You choose the width in pixels, from 16 to 2,000. The height follows each page’s own proportions, so portrait, landscape and rotated pages all keep their shape.
PNG is lossless and best for text and line art. JPG is usually smaller and suits pages with photos; you can set its quality from 10 to 100.
Yes. Choose Selected pages and enter pages and ranges such as 1-3, 5, 8-10. Invalid or out-of-range entries are explained before anything is rendered.
Exactly the thumbnails that were rendered successfully, named in page order — for example report-page-001.png, report-page-002.png. If a page cannot be rendered it is listed and left out.
Up to 500 pages per run. Very large widths on very tall pages are refused for that page so your browser does not run out of memory.
No. A PDF that needs a password to open is refused with a clear message. Remove the password in a PDF app first.
No. The PDF is opened and processed entirely in your browser. Nothing is uploaded, stored or sent, and Reset clears it from the page.
Private by design

This runs entirely in your browser

No file or text you enter here is uploaded. Encoding and decoding happen on your device using native browser APIs — close the tab and nothing remains on a server.

Install Toolisco Add it to your device for offline, one-tap access.