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PDF24 Tools alternatives · PDF Editors

Open-source alternatives to PDF24 Tools

PDF24 Tools is not described as open source on its own site. 4 of the 45 other PDF editors in this directory are open source, according to their own sites.

PDF24 Tools is free to use. All of them are free or have a free plan.

4 tools · Listings checked up to Nov 13, 2026 · Where the facts come from

How each one differs from PDF24 Tools

  1. PDFsam

    Split and merge PDFs offline, with paid Visual and Enhanced editions

    • PDFsam starts at $34.90 per user / year (PDFsam Visual); PDFsam Basic is free. PDF24 Tools is free.
    • Only PDFsam lists macOS and Linux apps.
    • Only PDF24 Tools lists a web app.
    • PDFsam is open source, according to its own site.
    PDFsam vs PDF24 ToolsPDFsam pricing and details

  2. Stirling PDF

    Open-source PDF editor you can run on your own machine or server

    • Stirling PDF starts at $99 per month for 100 users (Team). PDF24 Tools is free.
    • Only Stirling PDF lists macOS and Linux apps.
    • Stirling PDF is open source and self-hostable, according to its own site.
    • Stirling PDF also covers workflow automation.
    Stirling PDF vs PDF24 ToolsStirling PDF pricing and details

  3. Skim

    Free PDF reader and note-taker for Mac, built for papers

    • Skim is free. PDF24 Tools is free.
    • Only Skim lists a macOS app.
    • Only PDF24 Tools lists a web app.
    • Only PDF24 Tools lists a Windows app.
    Skim pricing and details

  4. SumatraPDF

    Small, free PDF, eBook and comic reader for Windows

    • SumatraPDF is free. PDF24 Tools is free.
    • SumatraPDF is open source, according to its own site.
    • SumatraPDF also covers documents.
    • PDF24 Tools also covers pDF editing.
    SumatraPDF pricing and details

Common questions

Is there an open-source alternative to PDF24 Tools?

Yes. PDFsam, Stirling PDF, Skim and SumatraPDF are open source, according to their own sites.

Is PDF24 Tools open source?

PDF24 Tools is not described as open source on its own site. The listing was checked on Oct 18, 2026 against the pages it cites.

When was this checked?

Each listing shows its own date. On this page they run from Oct 18, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to PDF24 Tools: the alternatives its listing names first, then the tools that share the most features with it.