Kroki
Unified API for rendering many text diagram formats, with a self-hostable server option.
What’s included for free?
Source code and local use have no provider-enforced monthly credit, export or project quota; you supply the device, runtime, storage and any hosting.
Provider information ↗Checked 2026-10-21
Before you use it
MIT for Kroki; bundled diagram engines and the public hosted service have separate terms and capacity.
Provider terms can change. Check current pricing and usage rights before starting a project.