PDF Stacker is a free Chrome extension that merges PDF files and converts JPG or PNG images into PDF pages, entirely inside your browser — no uploads, no accounts, no third-party server ever touching your files.
Instead of switching between a separate "merge PDF" tool and a separate "image to PDF" converter, PDF Stacker handles both in a single place. Drop in any mix of PDFs and images, drag them into the order you want, and download one combined PDF.
What you can do with it:
- Merge any number of PDF files into a single document
- Convert JPG or PNG images into PDF pages, even mixed in with regular PDFs
- Drag and drop to reorder files before merging
- Add an optional blank separator page between merged documents
- Choose "Fit to A4" for images, or keep their original size
- See live page counts and file sizes as you build your document
- Set a default filename for the files you download
How it works:
- Open the merge tool from the toolbar icon (or drop files directly onto it)
- Add your PDFs and/or images and drag them into the right order
- Click "Merge & Download" to get your combined PDF instantly
Everything happens locally in your browser — your documents and images are never sent to a server. No watermarks, no sign-up, no limits.
1. Open the Chrome Web Store page and click "Add to Chrome".
2. Confirm by clicking "Add extension" in the popup.
3. Click the PDF Stacker icon in the toolbar to open the merge tool.
4. Drag and drop your PDF files and/or JPG/PNG images onto the page, or click to choose them.
5. Drag the files into the order you want them combined.
6. Optionally enable a blank separator page or "Fit to A4" for images from Settings.
7. Click "Merge & Download" to instantly get your combined PDF.
Frequently Asked Questions
Yes, completely free with no account required and no watermarks added.
Yes, just drop one JPG or PNG file and it works as a standalone Image to PDF converter.
Yes, you can combine PDF files and JPG/PNG images together in any order.
No. Everything is processed 100% locally in your browser — files never leave your computer.
Yes, drag and drop files into the order you want before clicking Merge & Download.
No, you can merge as many PDFs and images as you like.
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