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ReSmush.it vs Watchmode

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

APIReSmush.itNEW—WatchmodeREACHABLE—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSnoyes
Card requirednono
Commercial useunclearunclear
Data licenseN/A — optimization service, not a datasetWatchmode terms
Free tierFree; per-image size cap applies (see docs)Free — 1,000 req/month
Rate limitUnpublished1,000 req/month (free tier)
In directory since2026-07-052026-07-05
operationalpartialdownno data

ReSmush.it vs Watchmode: common questions

Which is more reliable, ReSmush.it or Watchmode?

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

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

Can I call ReSmush.it and Watchmode from the browser?

Only Watchmode 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 ReSmush.it and Watchmode free for commercial use?

ReSmush.it has unclear commercial terms, and Watchmode 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.