File Format FOSS

Native open-source libraries to create, edit, and convert documents and images. Free and community-driven, for Python, .NET, Java, C++, Go, and more.

Explore FOSS libraries

Open-source file format libraries for native development.

Ready to Use

Open-source product families you can start building with today

Aspose.Words for FOSSWord Document AutomationGenerate, edit, and convert Word documents programmatically — DOCX, DOC, and RTF to PDF, Markdown, and plain text. Open-source, MIT-licensed, no Microsoft Office required. Aspose.PDF for FOSSPDF Management & SecurityOpen-source PDF processing for every platform. Create, edit, convert, secure, and digitally sign PDFs with native libraries for Python, .NET, Java, C++, and more. Aspose.Cells for FOSSExcel Spreadsheet ProcessingRead, write, and export Excel spreadsheets with full round-trip fidelity — cell styling, formula evaluation, chart generation, and AES-256 encryption. Aspose.Email for FOSSEmail Message ProcessingRead, create, and inspect Outlook MSG files — parse MAPI properties, extract attachments, and export to standard formats. No Outlook required. Aspose.Slides for FOSSPowerPoint Presentation ProcessingCreate, read, and edit PPTX presentations — add slides, shapes, tables, text formatting, and visual effects with safe round-trip export to PDF. Aspose.Note for FOSSOneNote Document ProcessingRead, extract, and convert Microsoft OneNote notebooks to PDF and images — navigate pages, sections, rich text, attachments, and embedded objects. Aspose.3D for FOSS3D File ProcessingLoad, build, and export 3D scenes in OBJ, STL, glTF, COLLADA, 3MF, and FBX — apply materials and query scene graphs. Zero native dependencies. Aspose.BarCode for FOSSBarcode Generation and RecognitionRead and write 60+ barcode types — QR codes, UPCs, Data Matrix, and more — with pro-level accuracy. Open-source libraries for Python, .NET, Java, C++, and other platforms.

Coming Soon to Open Source

Each product family delivers native libraries across multiple platforms so you can work in the language you already use

Aspose.Imaging for FOSSImage Editing & ConversionConvert, compress, crop, resize, and filter images with a cross-platform FOSS suite. Native libraries for Python, .NET, Java, and more handle 100+ image formats and animations. Aspose.Tasks for FOSSProject and Task ManagementWork with Microsoft Project files across platforms. Schedule tasks, allocate resources, track progress, and generate reports using open-source SDKs for Python, .NET, Java, C++, and more. Aspose.OCR for FOSSOptical Character RecognitionTurn scanned documents, receipts, and photos into structured data. This cross-platform OCR suite ships native libraries for Python, .NET, Java, and C++ with multilingual support. Aspose.ZIP for FOSSFile Compression and ArchivingCreate, read, extract, and manage archive formats with open-source libraries for Python, .NET, Java, C++, and more.

Coming Soon to Open SourceEach product family delivers native libraries across multiple platforms so you can work in the language you already use

Follow Our Journey

Why Developers Choose Aspose

Built by Agents, for AgentsAspose makes it easy for agents to understand, use, and integrate into anything from quick scripts to large-scale applications.

Proven ReliabilityBanks, governments, startups, and research labs already rely on Aspose. Now every developer gets the same proven stability and precision, in their language of choice.

Deep File Format ExpertiseWith 20+ years of file-format expertise, Aspose brings the insight and knowledge your Word, Excel, PDF, and image workflows need.

No External DependenciesUnlike most open-source libraries, Aspose runs independently. No MS Office, Adobe, or other extras needed. Just your code and our APIs.

Multi-Platform by DesignEach product family ships native SDKs for Python, .NET, Java, C++, Go, PHP, and more — so you work in the language and ecosystem you already know.

Open Source with a Proven Track RecordFree does not mean basic. These FOSS libraries carry proven file-format engineering principles for developers who need practical, open-source SDKs.

Open Source Benefits

Additional Benefits of Open Source

Truly Open SourceFree forever; no licenses or fees — just FOSS.

Native Multi-Platform SDKsNative libraries for Python, .NET, Java, C++, Go, PHP, and more.

Community-DrivenShaped by real user feedback and practical needs.

Unified File SuiteOne product family for docs, sheets, images, web, and archives.

Open & CommittedRegular releases deliver fixes and fresh features.

Development EmpowermentBuild big ideas without pricey commercial software.

Follow Aspose open source

Explore the FOSS file format libraries available today and follow the next product families as they open up.

Explore FOSS libraries