Browse free open source C PDF Editors and projects below. Use the toggles on the left to filter open source C PDF Editors by OS, license, language, programming language, and project status.

  • Rezku Point of Sale Icon
    Rezku Point of Sale

    Designed for Real-World Restaurant Operations

    Rezku is an all-inclusive ordering platform and management solution for all types of restaurant and bar concepts. You can now get a fully custom branded downloadable smartphone ordering app for your restaurant exclusively from Rezku.
    Learn More
  • All-in-one solution to control corporate spending Icon
    All-in-one solution to control corporate spending

    Issuance in seconds. Full spending control. Perfect for media buying.

    Wallester Business is a leading world-class solution to optimize your company’s financial processes! Issuing virtual and physical corporate expense cards with an IBAN account, expense monitoring, limit regulation, convenient accounting, subscription control — manage your finance on all-in-one platform in real time! Wallester Business benefits your business growth!
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  • 1
    SumatraPDF Reader

    SumatraPDF Reader

    Multi-format (PDF, EPUB, MOBI, FB2, CHM, XPS, DjVu) reader for Windows

    Sumatra PDF is a free PDF, eBook (ePub, Mobi), XPS, DjVu, CHM, Comic Book (CBZ and CBR) viewer for Windows. Sumatra PDF is powerful, small, portable and starts up very fast. Simplicity of the user interface has a high priority. Portable version is a single executable, can be run from USB drive and doesn't write to registry. For best results use the latest release available as that's what I use and test with. If things don't compile, first make sure you're using the latest version of Visual Studio. To compile you need Visual Studio 2019 16.6 or later. Free Community edition works.
    Downloads: 69 This Week
    Last Update:
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  • 2
    Vanilla.PDF

    Vanilla.PDF

    Cross-platform SDK for creating and modifying PDF documents

    Vanilla.PDF is a modern, high-performance, open-source C++17 SDK designed for creating, editing, signing, and analyzing PDF documents across multiple platforms. It requires no external runtime dependencies, making it lightweight and ideal for embedding into desktop applications, servers, or automation pipelines. The SDK offers full cross-platform support including Windows, Linux, macOS, and Android, with builds available for major compilers and architectures. Vanilla.PDF supports advanced PDF features such as adding CMS (PKCS#7) digital signatures, modifying content streams and metadata, and working with encryption and permissions based on standard PDF security models. It includes tools for parsing PDF internals like cross-reference tables and objects, providing fine-grained document analysis capabilities. The project is unit-tested with continuous integration pipelines, supporting sanitizers for enhanced code quality and stability.
    Downloads: 3 This Week
    Last Update:
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  • 3
    iTeXMac is an integrated software which components are: - a text editor dedicated to D.E. Knuth's TeX typesetting system - a frontend to a teTeX like distribution, that includes TeX engines and tools - a PDF viewer
    Downloads: 2 This Week
    Last Update:
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  • 4
    eLectrix PDF Viewer
    eLectrix is an application to view Portable Document Format (PDF) files. The program is written in the C programming language, using GTK+ for the user interface and poppler for rendering pages.
    Downloads: 2 This Week
    Last Update:
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  • Information Security Made Simple and Affordable | Carbide Icon
    Information Security Made Simple and Affordable | Carbide

    For companies requiring a solution to scale their business without incurring security debt

    Get expert guidance and smart tools to launch or level up your security and compliance efforts without the complexity.
    Learn More
  • 5
    Converter from FB2 to PDF format. Useful for ebook readers with bad or missing FB2 support.
    Downloads: 2 This Week
    Last Update:
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  • 6

    PDF Version Converter

    Convert PDF versions, so old software can still be used.

    This a GUI for calling Ghostscript to change PDF versions. If you have older software that needs PDF files in say 1.4 format, but your PDF file is 1.6, this is your answer. Select your file, choose which version and convert it. Requires Gnome 2.22.3 or better*, GTK 2.0 and of course Ghostscript. * I haven't tested on newer version of Gnome.
    Downloads: 0 This Week
    Last Update:
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  • 7
    This program implements a Postscript/PDF viewer for GGI.
    Downloads: 0 This Week
    Last Update:
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  • 8
    The project has moved to Sourceforge: http://sourceforge.net/projects/electrix/.
    Downloads: 0 This Week
    Last Update:
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  • 9
    gPDFText is a text editor for GTK+ that opens PDF documents for ebook readers, converts the text contents into plain ASCII text, restores the original paragraphs and removes unwanted line breaks to allow easier zooming on the reader.
    Downloads: 0 This Week
    Last Update:
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  • Respond 100x faster, more accurately, and improve your documentation Icon
    Respond 100x faster, more accurately, and improve your documentation

    Designed for forward-thinking security, sales, and compliance teams

    Slash response times for questionnaires, audits, and RFPs by up to 90%. OptiValue.ai automates the heavy lifting, freeing your team to focus on strategic priorities with intuitive tools for seamless review and validation.
    Learn More
  • 10
    gv allows a user to view and navigate through PostScript and PDF documents on an X display by providing a user interface for the ghostscript interpreter. It is based on an older viewer called Ghostview by Tim Thiesen.
    Downloads: 0 This Week
    Last Update:
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  • 11
    UFO, the Ultimate File Opener opens a file from the terminal, like you have used a doubleclick on the given filename. For example "open docu.pdf" starts your favourite PDF-Reader and displays docu.pdf in it...
    Downloads: 0 This Week
    Last Update:
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  • 12
    frmware for mp4 with jz47xx, sc8600 ... with more ebook feature
    Downloads: 0 This Week
    Last Update:
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  • 13
    A (batch) html to pdf converter based on Webkit.
    Downloads: 0 This Week
    Last Update:
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