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Kroki

Diagrams from text — health and metadata JSON

🔧 Developer ToolsUNMONITORED
AUTH NONECORS ✓AGENT ?HTTPS ✓COMMERCIAL ?

Renders Mermaid, PlantUML and more to images. The /health route returns service status as JSON; diagram POST routes return binary media.

—HOW IT'S SCORED ⓘ
▶ Run liveDocs ↗
Status badge · for your READMEshipapis health badge: — · unmonitored
ON PROBE SCHEDULE

We probe a documented GET and expect 2xx JSON — full uptime and health score. Open provider docs ↗

Uptime historystarts after first probe

On our probe schedule. Uptime charts appear after the first check lands.

Example responsefrom provider docs — not verified by us
GET https://kroki.io/health

{
  "version": {
    "actdiag": "3.3.0",
    "bpmn": "18.18.0",
    "pikchr": "7269f78c4a",
    "nwdiag": "3.3.0",
    "c4plantuml": "1.2026.6",
    "rackdiag": "3.3.0",
    "dot": "14.1.3",
    "symbolator": "1.2.2"
  },
  "status": "pass"
}
Call itcurl · fetch · python
curl "https://kroki.io/health"
const res = await fetch("https://kroki.io/health");
const data = await res.json();
console.log(data);
import requests

res = requests.get("https://kroki.io/health")
print(res.json())
Endpoints · 4On scheduleFULL DOCS ↗
On schedule — GET /health awaits first probe
GET/healthPROBED

Diagrams from text — health and metadata JSON

GET/ping

Lightweight ping endpoint.

GET/status

Service status metadata.

GET/graphviz/svg/eNpLyUwvSizIUHBXqPZIzcnJ17ULzy_KSanlAgB1EAjQ

ENpLyUwvSizIUHBXqPZIzcnJ17ULzy KSanlAgB1EAjQ — documented GET route.

Machine-readable spec

We probe a documented GET and expect 2xx JSON — full uptime and health score. Export includes every documented route below.

Response-shape history

Not tracked yet. Shape-change history starts once this API joins our probe schedule.

Kroki: common questions

Is Kroki free to use?

Yes — Kroki is a free developer tools API. Free tier: Free — limits not published. Whether the free tier allows commercial use is unclear — check the provider docs.

Does Kroki need an API key?

No — Kroki needs no API key or signup. You can call it straight away; rate limits still apply (Unpublished).

Can I call Kroki from the browser?

Yes — Kroki returns CORS headers over HTTPS, so front-end code can fetch it directly with no backend proxy. Use the fetch snippet on this page, or hit "Run live" to try it now.

Is Kroki up right now?

Kroki is catalogued but not yet on our probe schedule, so we don't publish a live status for it. Check the provider's own status page or docs for its current state.