PDF Thumbnail Generator

About this Tool

PDF thumbnail generator online free — create preview images from PDF pages instantly

You're building a document library, a portfolio, or a website that displays PDF files. Showing a blank icon next to every file tells visitors nothing. TruePDFs PDF Thumbnail Generator creates preview images from your PDF pages — sized and ready for web or document management. Free, browser-based, no installation.

What this tool does

Upload your PDF and it generates a preview image for every page. Set the width in pixels and the quality percentage to match your use case. Download individual thumbnails or grab everything as a ZIP file.

How to generate PDF thumbnails

Step 1: Upload your PDF

Click "Choose PDF" and select your file. Works on desktop and mobile.

Step 2: Adjust settings

Set the thumbnail width in pixels. Adjust quality percentage — higher for sharper images, lower for smaller file sizes.

Step 3: Generate

Click "Generate Thumbnails." All pages process automatically.

Step 4: Download

Preview the images and download individually or as a ZIP file. Done. No signup. No watermarks. Free.

Who needs this?

Web developers and designers

Building document libraries, download pages, or PDF showcase sections that need visual previews instead of generic file icons.

Businesses with document portals

Reports, brochures, and catalogs displayed on a website convert better when visitors can see a preview before clicking download.

Publishers and content creators

Ebook covers, report previews, and guide thumbnails for landing pages, email campaigns, or social media posts.

Document management teams

Visual thumbnails in internal document libraries make files easier to identify and navigate — especially in large archives.

What width should I set?

200px works for small grid displays and document libraries. 400px is good for larger previews on landing pages. 600px or above for high-resolution thumbnails used in print or large displays. Match the width to where the image will appear — oversized thumbnails slow page load without adding visible quality at smaller display sizes.

Frequently asked questions

Is it free?

Yes. Completely free, no hidden charges.

Can I generate thumbnails for all pages?

Yes. Every page generates a separate thumbnail — download all as a ZIP.

What image format are thumbnails saved as?

PNG format for clean, sharp previews.

Do I need an account?

No. Upload, generate, download.

Is my file secure?

Yes. Processing runs in your browser, files not stored permanently after processing.

Works on mobile?

Yes. Open TruePDFs in your phone browser — no app needed.