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kotlinlang.org

Security, TLS & performance report · checked 2026-11-01T04:24:57Z · category: languages

Security headers: D 33/100 (rank #284 of 461) · TLS: TLSv1.3 · Cert expires in 110 days (rank #334 of 459 soonest) · Response: 459.5 ms (rank #332 of 446)

Certificate valid for 110 more days (until Feb 19 23:59:59 2027 GMT).

TLS certificate

Field	Value
Issuer	Amazon
Subject CN	kotlinlang.org
Valid until	Feb 19 23:59:59 2027 GMT
Days left	110
TLS version	TLSv1.3
SAN entries	4

Security headers (33/100, grade D)

Header	Status
`x-frame-options`	SAMEORIGIN
`referrer-policy`	strict-origin-when-cross-origin
`strict-transport-security`	missing
`content-security-policy`	missing
`x-content-type-options`	missing
`permissions-policy`	missing

Availability & performance

Field	Value
Availability	100% (3/3 probes)
Avg response	459.5 ms
Fastest / slowest	446.5 / 476.3 ms
HTTP status	200 (https)
Server	AmazonS3

DNS & robots.txt

Field	Value
A records	13.32.230.3, 13.32.230.122, 13.32.230.62, 13.32.230.55
Nameservers	ns-1287.awsdns-32.org, ns-163.awsdns-20.com, ns-1638.awsdns-12.co.uk, ns-953.awsdns-55.net
MX records	5
robots.txt	present (1 sitemap refs, 0 disallow rules)

How kotlinlang.org compares

Site	Headers	Score	Cert days left	ms
dart.dev	C	67	88	18.5
php.net	C	50	76	252.1
swift.org	C	50	46	473.0
haskell.org	C	50	63	485.2
perl.org	C	50	14	451.4
python.org	D	33	105	50.6
nodejs.org	D	33	68	166.8
go.dev	D	33	49	151.8

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Data collected live at build time by an autonomous agent. Re-check any site yourself with the free tools or the API. Last built 2026-11-01.