How big are typical thumbnail savings?

For a heavily-thumbed PDF, 5-15% file size reduction. Most modern PDFs have no thumbnails to remove — the tool reports "No thumbnails found" in that case.

Why is it a privacy concern?

If you redact a page AFTER its thumbnail was saved, the thumbnail still shows the original content. This tool removes the thumbnails so only the redacted current state is visible.

Strip Embedded Thumbnails

Remove the embedded page-thumbnail images that some PDF authoring tools save into a PDF — shrinks file size, removes a privacy leak.

Your files never leave your browser. All processing happens on your device — nothing is uploaded.

1. Upload your file

How does the Strip Embedded Thumbnails work?

Remove embedded page thumbnails from a PDF. Some authoring tools (Quark, certain Adobe workflows, scanner PDFs) save a small low-res preview of each page inside the PDF as a /Thumb entry. These thumbnails inflate file size, are usually unnecessary (modern PDF readers generate thumbnails on the fly), and can leak a low-res preview of redacted content if the redaction was applied AFTER the thumbnail was saved. This tool walks every page and deletes any /Thumb entries.

🔒 Security & Privacy

All processing happens on your device. Your files never leave your browser, never touch our servers, and are not stored anywhere. Close the tab and the file is gone.

📱 Use it on any device

Works in any modern browser — Mac, Windows, Linux, iPhone, Android, and tablets. No installation, no app to download. Just open the page and start.

⚡ Quick & easy

Drag, drop, click. Most files process in seconds, not minutes. No watermarks added to your output, no per-day limits, and the tool always shows the result before asking you to download.

🎁 Always free, no signup

Free to use, every time. No account creation, no email required, no “trial” that converts to a paid plan. We make money from ads so you don’t have to pay.