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ReSmush.it vs Screenshotlayer

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

APIReSmush.itNEW—ScreenshotlayerNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSnoyes
Card requirednono
Commercial useunclearunclear
Data licenseN/A — optimization service, not a datasetUnverified
Free tierFree; per-image size cap applies (see docs)Free — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ReSmush.it vs Screenshotlayer: common questions

Which is more reliable, ReSmush.it or Screenshotlayer?

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

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

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

Neither sends browser-friendly CORS headers reliably, so call ReSmush.it and Screenshotlayer from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are ReSmush.it and Screenshotlayer free for commercial use?

ReSmush.it has unclear commercial terms, and Screenshotlayer 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.