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klarna.com

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

Security headers: C 67/100 (rank #175 of 461) · TLS: TLSv1.3 · Cert expires in 145 days (rank #387 of 459 soonest) · Response: 614.0 ms (rank #366 of 446)
Certificate valid for 145 more days (until Mar 26 23:59:59 2027 GMT).

TLS certificate

FieldValue
IssuerAmazon
Subject CNklarna.com
Valid untilMar 26 23:59:59 2027 GMT
Days left145
TLS versionTLSv1.3
SAN entries30

Security headers (67/100, grade C)

HeaderStatus
strict-transport-securitymax-age=31536000; includeSubDomains; preload
content-security-policydefault-src 'self';script-src 'self' 'strict-dynamic' 'wasm-unsafe-eval' 'nonce-fc4b923e-6
x-content-type-optionsnosniff
referrer-policystrict-origin-when-cross-origin
x-frame-optionsmissing
permissions-policymissing

Availability & performance

FieldValue
Availability100% (3/3 probes)
Avg response614.0 ms
Fastest / slowest545.9 / 678.5 ms
HTTP status200 (https)
Serverenvoy

DNS & robots.txt

FieldValue
A records3.173.23.37, 3.173.21.37, 3.173.22.37
Nameserversa1-74.akam.net, a5-64.akam.net, edns7.ultradns.com, edns7.ultradns.org
MX records4
robots.txtpresent (1 sitemap refs, 40 disallow rules)

How klarna.com compares

SiteHeadersScoreCert days leftms
stripe.comB83189123.0
revolut.comB8342131.5
adyen.comB8368153.3
lemonsqueezy.comB8360150.6
paddle.comB8369106.2
ko-fi.comB838436.7
paypal.comC67160214.5
square.comC6756244.0

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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.