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ReSmush.it vs ChartLyrics

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

APIReSmush.itNEW—ChartLyricsDEAD0
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesunknown
HTTPSnono
Card requirednono
Commercial useunclearunclear
Data licenseN/A — optimization service, not a datasetUnlicensed lyrics data
Free tierFree; per-image size cap applies (see docs)Was: unlimited
Rate limitUnpublished—
In directory since2026-07-052026-05-02
operationalpartialdownno data

ReSmush.it vs ChartLyrics: common questions

Which is more reliable, ReSmush.it or ChartLyrics?

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

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

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

Neither sends browser-friendly CORS headers reliably, so call ReSmush.it and ChartLyrics 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 ChartLyrics free for commercial use?

ReSmush.it has unclear commercial terms, and ChartLyrics 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.