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Harry Potter API vs ReSmush.it

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

APIHarry Potter APINEW—ReSmush.itNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedN/A — optimization service, not a dataset
Free tierFree — limits not publishedFree; per-image size cap applies (see docs)
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Harry Potter API vs ReSmush.it: common questions

Which is more reliable, Harry Potter API or ReSmush.it?

On our scheduled checks, ReSmush.it leads on measured uptime — Harry Potter API at —% versus ReSmush.it 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 Harry Potter API and ReSmush.it need an API key?

Neither needs a paid key — Harry Potter API is callable with no signup, and ReSmush.it is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Harry Potter API and ReSmush.it from the browser?

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

Are Harry Potter API and ReSmush.it free for commercial use?

Harry Potter API has unclear commercial terms, and ReSmush.it 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.