Voiden - A Markdown based Open Source Alternative to Postman
Voiden - A Markdown based Open Source Alternative to Postman
GitHub - VoidenHQ/voiden: Define, test, and document APIs like a developer, not a SaaS user. No accounts. No lock-in. No telemetry. Just Markdown, Git, hotkeys, and your damn specs.
Voiden is an offline-first, git-native API tool built on Markdown - and it very intentionally didn’t start as “let’s build a better Postman”.
Over time, API tooling became heavyweight: cloud dependencies for local work, forced accounts, proprietary formats, and workflows that break the moment you’re offline. Testing a localhost API shouldn’t need an internet connection.
So we asked a simple question: What if an API tool respected how developers already work?
That led to a few core ideas:
- Offline-first, no accounts, no telemetry
- Git as the source of truth
- Specs, tests, and docs living together in Markdown
We opensourced Voiden because extensibility without openness just shifts the bottleneck.
If workflows should be transparent, the tool should be too.
Github : https://github.com/VoidenHQ/voiden
Download here : https://voiden.md/download