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spring.io

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

Security headers: C 67/100 (rank #129 of 461) · TLS: TLSv1.3 · Cert expires in 146 days (rank #388 of 459 soonest) · Response: 101.6 ms (rank #122 of 446)

Certificate valid for 146 more days (until Mar 27 23:59:59 2027 GMT).

TLS certificate

Field	Value
Issuer	DigiCert Inc
Subject CN	*.spring.io
Valid until	Mar 27 23:59:59 2027 GMT
Days left	146
TLS version	TLSv1.3
SAN entries	3

Security headers (67/100, grade C)

Header	Status
`strict-transport-security`	max-age=15552000; includeSubDomains
`x-frame-options`	DENY
`x-content-type-options`	nosniff
`referrer-policy`	same-origin
`content-security-policy`	missing
`permissions-policy`	missing

Availability & performance

Field	Value
Availability	100% (3/3 probes)
Avg response	101.6 ms
Fastest / slowest	82.9 / 124.9 ms
HTTP status	200 (https)
Server	cloudflare

DNS & robots.txt

Field	Value
A records	172.64.145.101, 104.18.42.155
Nameservers	mary.ns.cloudflare.com, theo.ns.cloudflare.com
MX records	3
robots.txt	present (1 sitemap refs, 0 disallow rules)

How spring.io compares

Site	Headers	Score	Cert days left	ms
nextjs.org	B	83	51	110.5
djangoproject.com	B	83	84	117.4
remix.run	C	67	68	67.0
vuejs.org	C	50	44	70.3
laravel.com	C	50	65	293.8
flask.palletsprojects.com	D	33	31	190.4
fastapi.tiangolo.com	D	33	83	103.1
solidjs.com	D	33	87	199.7

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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.