PDFsam Review 2026: The Best Free PDF Splitter and Merger?

Short answer: yes — if you want offline. PDFsam Basic is the best free open-source desktop tool for splitting, merging, rotating, and extracting pages from PDFs in 2026. The single most important thing to understand: your files never leave your computer. Unlike Smallpdf, ILovePDF, and the dozens of other web-based PDF tools, PDFsam runs entirely offline. For confidential documents — HR records, contracts, medical files, anything you would not want sitting on someone else's server — that single fact is the whole pitch.

The interface is purposeful and unglamorous. There are no animations, no marketing language, no AI buzz. You point it at a PDF, choose an operation, and it works. After several years of using it for editorial workflows, our take is that this is exactly what a PDF utility should be.

What Is PDFsam?

PDFsam stands for "PDF Split and Merge" — that was its original scope when the project launched in 2006. Today the product family includes three separate apps:

• PDFsam Basic — free, open source under AGPL3. Page-level operations: split, merge, rotate, extract, mix.
• PDFsam Enhanced — paid subscription. Full PDF content editor: edit text and images, fill forms, OCR scanned PDFs, redact sensitive data, convert PDFs to/from Word, Excel, PowerPoint, images.
• PDFsam Visual — paid. Drag-and-drop visual page editor with thumbnail previews for reordering, splitting, and combining.

This review focuses on PDFsam Basic, the free version, because that is what most users need. Enhanced and Visual are good products but the page-level operations covered by Basic handle 80–90 percent of real PDF tasks, and the free version has no time limits, no watermarks, and no nag screens.

The project was originally developed by an Italian developer and later transferred to Sober Lemur (the same team continues development). The source code lives on GitHub and accepts community contributions. Updates arrive consistently — the 5.x branch is current and stable.

What PDFsam Basic Actually Does

The free version covers six core operations:

1. Split

Break a PDF into multiple smaller PDFs. Methods supported:

• Split by every N pages — useful for chunking a 500-page document into 50-page sections.
• Split after specific pages — "after page 5, 12, and 25, create new files." Useful for separating multi-chapter scans.
• Split by bookmarks — if the source PDF has bookmarks (chapter markers), split at each one. Excellent for ebooks and reports.
• Split by size — produce output files no larger than X MB. Useful when email gateways have attachment size limits.

2. Merge

Combine multiple PDFs into one. You can drag files to reorder, choose to include or skip bookmarks and forms, and control the output naming convention. Bonus: PDFsam can also include certain page ranges from each source file (page 1–3 of file A, all of file B, page 7–12 of file C, etc).

3. Rotate

Permanently rotate pages 90, 180, or 270 degrees. Apply to all pages, even pages only, odd pages only, or specific page ranges. Useful for fixing scanned documents where some pages came in sideways.

4. Extract

Pull a specific subset of pages from a PDF into a new file. "Give me pages 12, 15–20, and 47 as a new PDF." Common for redistributing relevant sections of a long report without sharing the whole thing.

5. Mix (Alternate Mix)

Interleave pages from two PDFs. This is the workflow for combining a stack of "odd pages" and "even pages" scans from a duplex-incapable scanner into one correctly ordered document. A small feature, but anyone who has scanned a double-sided document on a one-sided scanner knows the pain.

6. Split by Size

Same idea as Split but with file size as the criterion. Set "max 5 MB per file" and PDFsam produces output PDFs each at or below that size.

The Workflow: How PDFsam Basic Feels in Practice

The interface is dense and functional. The home screen shows the six operations as tiles. Click one, you get a dialog with:

• An input area to drag PDF files (multiple if relevant)
• Operation-specific options (split criteria, page ranges, etc.)
• Output destination and naming convention
• A "Run" button

Click Run. A progress bar appears for a fraction of a second on small files, longer on large ones. The output PDF lands in your destination folder. Done. There is no preview, no live editing canvas, no "are you sure?" dialogs in the way. It is a tool, not an experience.

For users who want visual page-level editing — drag pages around in thumbnails, see what you are doing — PDFsam Visual (paid) is the upgrade path. Most users will not need it. Once you have used Basic for two or three real jobs, the lack of visual preview stops being a problem.

PDFsam vs Web Tools: The Privacy Trade-Off

Web tools win on convenience — no install required, accessible from any browser. PDFsam wins on three counts:

1. Privacy. Files never leave your machine. This is non-negotiable for legal, HR, medical, or proprietary documents.
2. File size. Web tools cap free uploads at 5–10 MB. PDFsam handles multi-gigabyte PDFs limited only by your RAM.
3. Throughput. Need to split 50 PDFs in a batch? Web tools meter you. PDFsam runs as fast as your CPU and disk allow.

The honest recommendation: use PDF24 or Smallpdf for one-off jobs on a borrowed computer or non-sensitive files. Install PDFsam Basic for everything else.

PDFsam vs Sejda vs Smallpdf vs Adobe Reader Free

PDFsam vs Sejda

Sejda is a friendlier visual tool with form filling and basic content editing in the free tier — but caps you at 3 tasks per hour and 200 pages or 50 MB per task in the free version. PDFsam Basic is uglier but has no limits. For occasional visual edits, use Sejda. For unlimited splitting and merging, use PDFsam. Many users keep both. See our forthcoming Sejda review.

PDFsam vs Smallpdf

Smallpdf is the prettiest PDF tool on the web. It has a much wider feature set than PDFsam Basic in its paid tier (compress, convert to Word, edit, sign, redact, OCR). The price for that breadth: a $9/mo subscription and all your files routing through Smallpdf's servers. PDFsam is offline and free, but only does page-level operations. If you live in the browser and your files are not sensitive, Smallpdf is great. If you process confidential PDFs, install PDFsam.

PDFsam vs Adobe Acrobat Reader

Acrobat Reader is for reading and form filling, not page manipulation. You cannot split or merge in the free Reader — only the paid Acrobat Pro can. PDFsam Basic does free what Adobe charges $14.99/month for, at least at the page-level operations.

How to Use PDFsam Basic: Three Real Workflows

Workflow 1: Combining a duplex-scanner output

You scanned a double-sided document on a one-sided scanner, producing two PDFs: odd.pdf (pages 1, 3, 5, 7…) and even.pdf (pages 2, 4, 6, 8…). To merge them in the right order:

1. Open PDFsam Basic. Click Alternate Mix.
2. Drag odd.pdf as the first input.
3. Drag even.pdf as the second input.
4. If your even pages were scanned in reverse (page 8, 6, 4, 2), check "Reverse" for the second input.
5. Set output destination. Click Run. Done.

Workflow 2: Splitting a long report into chapters

You have a 200-page report with bookmarks at each chapter and want one PDF per chapter:

1. Open PDFsam Basic. Click Split by bookmarks.
2. Drag the source PDF in.
3. Set bookmark level (usually 1 for chapter-level bookmarks).
4. Set output folder. Click Run. PDFsam produces one PDF per chapter with bookmark names as filenames.

Workflow 3: Reducing PDF size for email

You have a 30 MB PDF and your email gateway caps attachments at 10 MB:

1. Open PDFsam Basic. Click Split by size.
2. Drag the source PDF in. Set max output size to 8 MB.
3. Set output folder. Click Run. PDFsam produces multiple smaller PDFs you can attach across separate emails or to a cloud share.

Best PDFsam Alternatives

Safe Download Notes

Frequently Asked Questions

The Verdict

PDFsam Basic is the best free PDF page-manipulation tool on Windows, Mac, and Linux in 2026. It is not pretty, it does not edit content, and it will not impress anyone with its UI. What it does is split, merge, rotate, and extract PDFs reliably, offline, with no limits, no upload, and no subscription. For confidential documents, large files, or regular batch jobs, those properties are exactly what you want.

Install it once, learn three workflows, and you will use it for years. Pair it with a fast PDF reader (Sumatra or Okular — see our forthcoming lightweight PDF reader guide) and Sejda for occasional visual or form work, and you have a complete free PDF workflow without a single Adobe subscription. For users who specifically need full PDF editing, look at our Nitro PDF review.