apilayer pdflayer vs LibreTranslate

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

Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms422619
P95 · ms12251474
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified (software is AGPL-3.0)
Free tierFree tier — key may be requiredFree — /languages is keyless; hosted /translate may require a key or donation
Rate limitUnpublishedUnpublished (per hosted instance)
In directory since2026-07-052026-07-05
operationalpartialdownno data

apilayer pdflayer vs LibreTranslate: common questions

Which is more reliable, apilayer pdflayer or LibreTranslate?

Both are neck-and-neck — apilayer pdflayer and LibreTranslate 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, apilayer pdflayer or LibreTranslate?

apilayer pdflayer has the lower median latency in our checks — apilayer pdflayer responds in 422 ms versus LibreTranslate at 619 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 apilayer pdflayer and LibreTranslate need an API key?

LibreTranslate needs no key, while apilayer pdflayer requires a free API key. If you want to start calling without signup, reach for LibreTranslate first.

Can I call apilayer pdflayer and LibreTranslate from the browser?

Yes — both apilayer pdflayer and LibreTranslate send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are apilayer pdflayer and LibreTranslate free for commercial use?

apilayer pdflayer has unclear commercial terms, and LibreTranslate 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.