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OCR.Space vs QuickChart

Same instrument, two spec sheets — measured, not claimed.

APIOCR.SpaceREACHABLE—QuickChartNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key may be required for productionFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

OCR.Space vs QuickChart: common questions

Which is more reliable, OCR.Space or QuickChart?

On our scheduled checks, QuickChart leads on measured uptime — OCR.Space at —% versus QuickChart at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do OCR.Space and QuickChart need an API key?

QuickChart needs no key, while OCR.Space requires a free API key. If you want to start calling without signup, reach for QuickChart first.

Can I call OCR.Space and QuickChart from the browser?

Only OCR.Space is browser-friendly — it returns CORS headers over HTTPS. QuickChart needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are OCR.Space and QuickChart free for commercial use?

OCR.Space has unclear commercial terms, and QuickChart 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.