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An open-source declarative language for generating documents from one definition, compiling to HTML, PDF and Excel. A developer infrastructure tool for structured documents, not a spreadsheet replacement.
Open source
What to know▼
How it works
An open-source declarative language and intermediate representation for documents that compiles one document definition into HTML, PDF and Excel output, keeping business logic separate from presentation.
What's different
Replaces embedding programming logic into templates with a compact semantic syntax that Python applications and AI agents can generate directly.
Best for
Developers building document-generation pipelines who need one definition to produce multiple output formats.
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An open-source Laravel package for building Excel, CSV, and PDF exports with filters, permissions, and streaming.
Open sourceCan export my data
What to know▼
How it works
An open-source Laravel package for building Excel, CSV, and PDF exports from a single definition, with filters, relationships, queues, permissions, and high-performance streaming.
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A free, open-source browser tool that compresses and converts images, video, audio and PDFs entirely on your device with no uploads or ads — a general utility, not developer-specific.
FreeWorks offlineData stays with you
What to know▼
How it works
An open-source app with 47 tools for compressing and converting images, video, audio and PDFs, with all processing happening on-device so files never leave your computer, including offline use.
What's different
No upload step at all — compression runs entirely locally, works offline, with no ads, accounts or size limits.
Pricing
Free forever.
Best for
Anyone who wants to compress or convert media files without uploading them to a server.
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An open-source desktop app that scans OpenAPI/Swagger APIs against 49+ OWASP security rules and generates vulnerability reports.
Open source
What to know▼
How it works
Applies YAML-based OWASP API Security rules to OpenAPI 3.1, Swagger 2.0, and Postman specs, producing PDF/HTML reports; also runnable via CLI/Docker for CI/CD.
Best for
Developers and security engineers scanning APIs as part of a CI/CD pipeline.
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A free, open-source browser tool for converting and compressing files into ZIP format, and editing Word documents into PDF online — a general file utility, not developer-specific.
FreeOpen sourceNo ads
What to know▼
How it works
Converts and compresses multiple files into ZIP format directly in the browser, and can edit Word documents online before converting them to PDF.
What's different
Open-source and runs entirely in the browser, ad-free.
Pricing
100% free.
Best for
Anyone needing a private, ad-free way to convert or compress files without uploading them elsewhere.
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Turns your Markdown files into a visual workspace with outlines and mind maps while keeping the underlying files as plain Markdown — for developers, writers and creators.
Works offlineOpen source
What to know▼
How it works
Adds a visual layer, outlines, mind maps, multiple views, on top of Markdown files while keeping the underlying files as plain Markdown, combined with AI-assisted writing and Git-based version history.
What's different
Open-source, local-first, and runs in the browser, keeping files as native Markdown rather than locking content into a proprietary format.
Best for
Developers, writers, and creators who want to navigate long Markdown documents visually without leaving the Markdown format.
