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Last.fm vs ReSmush.it

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

APILast.fmREACHABLE—ReSmush.itNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseLast.fm terms — attribution requiredN/A — optimization service, not a dataset
Free tierFree personal API keyFree; per-image size cap applies (see docs)
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Last.fm vs ReSmush.it: common questions

Which is more reliable, Last.fm or ReSmush.it?

On our scheduled checks, ReSmush.it leads on measured uptime — Last.fm 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 Last.fm and ReSmush.it need an API key?

ReSmush.it needs no key, while Last.fm requires a free API key. If you want to start calling without signup, reach for ReSmush.it first.

Can I call Last.fm and ReSmush.it from the browser?

Only Last.fm 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 Last.fm and ReSmush.it free for commercial use?

Last.fm 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.