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Falcon Merge vs PDFtk

Both stand on pdf merger software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Falcon Merge

Free plan Web

Choose Falcon Merge for straightforward browser-based PDF combining, especially when keeping file contents on-device is important. Look elsewhere if you need source metadata preserved, integrations today, or certainty that all source bookmarks will carry over.

Visit Falcon Merge

PDFtk

Free plan LinuxMacSelf-hosted+1

Pick PDFtk for a low-cost toolkit when its GUI merge and split functions, Pro operations, or Server command-line capabilities match your workflow. Look elsewhere if you need broader GUI features without buying Pro, or if commercial redistribution licensing does not fit your product plans.

Visit PDFtk

The facts

Falcon MergePDFtk
Free planYesYes
Open sourceNot publishedNot published
Runs onWebLinux, Mac, Self-hosted, Windows
Lowest paid planBundle: ₹49 a monthPDFtk Pro: $3.99, paid once
Plans published34
MakerNot publishedNot published
Websitepdf.falcon.enterprisespdflabs.com
On pdf merger software#15 of 36#19 of 36

Falcon Merge: what it does well

  • Processes PDF files locally in the browser tab.
  • No account or card is required for the free Browser plan.
  • Drag file rows to choose the output page order.
  • Preserves selectable text, resolution and form fields.
  • No fixed file-count cap; device memory is the practical limit.

What to know first

  • Source bookmarks may not all survive the merge.
  • The saved output drops source metadata.
  • The planned Agent API uses server-side processing.
  • No integration is available today.

PDFtk: what it does well

  • PDFtk Free has a GUI for merging and splitting PDFs and pages.
  • Pro adds rotation, watermarking, stamping, and document security tools.
  • Server supports form filling, bookmark and metadata updates, and file attachments.
  • Server can attempt repairs and encrypt output or decrypt input with its password.
  • PDFtk Pro includes both PDFtk Server and graphical and command-line access.

What to know first

  • The free GUI is limited to merging and splitting PDFs and pages.
  • Commercial redistribution of Server generally requires a separate license.
  • PDF Labs products may create local troubleshooting logs that customers must cover under their privacy policies.

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