ReSmush.it vs xColors

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

Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms462642
P95 · ms29011161
Authnonenone
CORSyesyes
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 xColors: common questions

Which is more reliable, ReSmush.it or xColors?

Both are neck-and-neck — ReSmush.it and xColors each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, ReSmush.it or xColors?

ReSmush.it has the lower median latency in our checks — ReSmush.it responds in 462 ms versus xColors at 642 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do ReSmush.it and xColors need an API key?

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

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

Only xColors 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 xColors free for commercial use?

ReSmush.it has unclear commercial terms, and xColors 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.