CDNJS vs Kroki
Same instrument, two spec sheets — measured, not claimed.
CDNJS vs Kroki: common questions
Which is more reliable, CDNJS or Kroki?
Both are neck-and-neck — CDNJS and Kroki each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.
Which is faster, CDNJS or Kroki?
CDNJS has the lower median latency in our checks — CDNJS responds in 281 ms versus Kroki at 633 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.
Do CDNJS and Kroki need an API key?
Neither needs a paid key — CDNJS is callable with no signup, and Kroki is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call CDNJS and Kroki from the browser?
Yes — both CDNJS and Kroki send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are CDNJS and Kroki free for commercial use?
CDNJS has unclear commercial terms, and Kroki has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.