Index · Cert expiry · Fastest sites · Free tools · API

react.dev

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

Security headers: F 17/100 (rank #341 of 461) · TLS: TLSv1.3 · Cert expires in 74 days (rank #219 of 459 soonest) · Response: 59.3 ms (rank #64 of 446)

Certificate valid for 74 more days (until Jan 14 12:05:18 2027 GMT).

TLS certificate

Field	Value
Issuer	Let's Encrypt
Subject CN	react.dev
Valid until	Jan 14 12:05:18 2027 GMT
Days left	74
TLS version	TLSv1.3
SAN entries	1

Security headers (17/100, grade F)

Header	Status
`strict-transport-security`	max-age=63072000
`content-security-policy`	missing
`x-frame-options`	missing
`x-content-type-options`	missing
`referrer-policy`	missing
`permissions-policy`	missing

Availability & performance

Field	Value
Availability	100% (3/3 probes)
Avg response	59.3 ms
Fastest / slowest	51.1 / 68.1 ms
HTTP status	200 (https)
Server	Vercel

DNS & robots.txt

Field	Value
A records	76.76.21.61, 66.33.60.130
Nameservers	hattie.ns.cloudflare.com, junade.ns.cloudflare.com
MX records	0
robots.txt	present (0 sitemap refs, 1 disallow rules)

How react.dev compares

Site	Headers	Score	Cert days left	ms
nextjs.org	B	83	51	110.5
djangoproject.com	B	83	84	117.4
spring.io	C	67	146	101.6
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

Embed this badge

Show your grade in your README (free, auto-updates):

[![security](https://pseo.rovy.tech/api/v1/badge?url=https://react.dev)](https://pseo.rovy.tech/sites/react-dev.html)

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.