Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.CCrawlabilityActionrobots.txt present, sitemap with 0 URLsREVIEW
Search engines may not be able to parse the sitemap. Fix XML validation errors.
An unparseable sitemap is silently ignored by Google — the URLs it advertises are never queued for crawl.
Learn more ▾ ▴
Google's sitemap parser is strict about XML validity. A single unescaped `&` or unclosed tag invalidates the whole file. Run your sitemap through a validator (Search Console's Sitemaps report flags it) and fix the offending entry. Most generators escape correctly; mistakes usually come from manually-written entries.
Source: sitemaps.org / Google Search Central
An empty sitemap provides no value. Add <url> entries for your pages.
An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.
Learn more ▾ ▴
Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.
Source: Google Search Central / sitemaps.org
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.
robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.
Source: sitemaps.org
<!doctype html>
<html
lang="en"
dir="ltr">
<head>
<meta name="google-signin-client-id" content="721724668570-nbkv1cfusk7kk4eni4pjvepaus73b13t.apps.googleusercontent.com"><meta name="google-signin-scope"
content="profile email https://www.googleapis.com/auth/developerprofiles https://www.googleapis.com/auth/developerprofiles.award https://www.googleapis.com/auth/devprofiles.full_control.firstparty"><meta property="og:site_name" content="Firebase">
<meta property="og:type" content="website"><meta name="theme-color" content="#a8c7fa"><meta charset="utf-8">
<meta content="IE=Edge" http-equiv="X-UA-Compatible">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="manifest" href="/_pwa/firebase/manifest.json"
crossorigin="use-credentials">
<link rel="preconnect" href="//www.gstatic.com" crossorigin>
<link rel="preconnect" href="//fonts.googleapis.com" crossorigin>
<link rel="preconnect" href="//www.google-analytics.com" crossorigin><link rel="stylesheet" href="//fonts.googleapis.com/css?family=Google+Sans:400,500|Roboto:400,400italic,500,500italic,700,700italic|Roboto+Mono:400,500,700&display=swap">
<link rel="stylesheet"
href="//fonts.googleapis.com/css2?family=Material+Icons&family=Material+Symbols+Outlined&display=block"><link rel="stylesheet" href="https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/firebase/css/app.css">
<link rel="stylesheet" href="https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/firebase/css/dark-theme.css" disabled>
<link rel="shortcut icon" href="https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/firebase/images/favicon.png">
<link rel="apple-touch-icon" href="https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/firebase/images/touchicon-180.png"><link rel="canonical" href="https://firebase.google.com/products/hosting"><link rel="search" type="application/opensearchdescription+xml"
title="Firebase" href="https://firebase.google.com/s/opensearch.xml">
<link rel="alternate" hreflang="en"
href="https://firebase.google.com/products/hosting" /><link rel="alternate" hreflang="x-default" href="https://firebase.google.com/products/hosting" /><link rel="alternate" hreflang="zh-Hans"
href="https://firebase.google.com/products/hosting?hl=zh-cn" /><link rel="alternate" hreflang="id"
href="https://firebase.google.com/products/hosting?hl=id" /><link rel="alternate" hreflang="ja"
href="https://firebase.google.com/products/hosting?hl=ja" /><link rel="alternate" hreflang="ko"
href="https://firebase.google.com/products/hosting?hl=ko" /><link rel="alternate" hreflang="pt-BR"
href="https://firebase.google.com/products/hosting?hl=pt-br" /><link rel="alternate" hreflang="es-419"
href="https://firebase.google.com/products/hosting?hl=es-419" /><title>Firebase Hosting | Fast, secure hosting for static websites</title>
<meta property="og:title" content="Firebase Hosting | Fast, secure hosting for static websites"><meta name="description" content="Discover Firebase, Google’s mobile and web app development platform that helps developers build apps and games that users will love.">
<meta property="og:description" content="Discover Firebase, Google’s mobile and web app development platform that helps developers build apps and games that users will love."><meta property="og:url" content="https://firebase.google.com/products/hosting"><meta property="og:locale" content="en"><script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "Article",
"headline": "Firebase Hosting | Fast, secure hosting for static websites"
}
</script>
<meta content="IE=edge" http-equiv="X-UA-Compatible"/>
<meta content="width=device-width, initial-scale=1" name="viewport"/>
<meta content="Firebase Hosting | Fast, secure hosting for static websites" name="name"/>
<meta content="https://firebase.google.com/images/social.png" name="image"/>
<meta content="Firebase Hosting | Fast, secure hosting for static websites" name="twitter:title"/>
<meta content="Discover Firebase, Google’s mobile and web app development platform that helps developers build apps and games that users will love." name="twitter:description"/>
<meta content="@firebase" name="twitter:site"/>
<meta content="firebase.google.com" name="twitter:domain"/>
<meta content="/images/products/app-hosting/hero.png" name="twitter:image"/>
<meta name="twitter:image:alt" value=""/>
<meta name="twitter:card" value=""/>
<meta content="Firebase Hosting | Fast, secure hosting for static websites" property="og:title"/>
<meta content="website" property="og:type"/>
<meta content="https://firebase.google.com/products/hosting/" property="og:url"/>
<meta content="https://firebase.google.com/images/social.png" property="og:image"/>
<meta content="Discover Firebase, Google’s mobile and web app development platform that helps developers build apps and games that users will love." property="og:description"/>
<meta content="no" name="msapplication-tap-highlight"/>
<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,100..800;1,100..800&display=swap" rel="stylesheet" data-page-link><link href="https://fonts.googleapis.com/css?family=Google+Sans:400,500,600,700" rel="stylesheet" data-page-link>
</head>
<body class="firebase-page-product firebase__bg--white firesite-lang--en firebase-page-product firebase__bg--white color-scheme--light"
template="page"
theme="firebase-icy-theme"
type="article"
appearance="device"
appearance
layout="full"
free-trial
concierge='hide'
pending>
<devsite-progress type="indeterminate" id="app-progress"></devsite-progress>
<a href="#main-content" class="skip-link button">
Skip to main content
</a>
<section class="devsite-wrapper">
<devsite-cookie-notification-bar></devsite-cookie-notification-bar>
<devsite-header role="banner" keep-tabs-visible>
<div class="devsite-header--inner" data-nosnippet>
<div class="devsite-top-logo-row-wrapper-wrapper">
<div class="devsite-top-logo-row-wrapper">
<div class="devsite-top-logo-row">
<button type="button" id="devsite-hamburger-menu"
class="devsite-header-icon-button button-flat material-icons gc-analytics-event"
data-category="Site-Wide Custom Events"
data-label="Navigation menu button"
visually-hidden
aria-label="Open menu">
</button>
<div class="devsite-product-name-wrapper">
<a href="/" class="devsite-site-logo-link gc-analytics-event"
data-category="Site-Wide Custom Events" data-label="Site logo" track-type="globalNav"
track-name="firebase" track-metadata-position="nav"
track-metadata-eventDetail="nav">
<picture>
<source srcset="https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/firebase/images/lockup.svg"
media="(prefers-color-scheme: dark)"
class="devsite-dark-theme">
<img src="https://www.gstatic.com/devrel-devsite/prod/v579073a50c63499824df5a68b8922367066583d283ef78fdade1028efdb4ceb5/firebase/images/lockup.svg" class="devsite-site-logo" alt="Firebase">
</picture>
</a>
</div>
<div class="devsite-top-logo-row-middle">
<div class="devsite-header-upper-tabs">
<devsite-tabs class="upper-tabs">
<nav class="devsite-tabs-wrapper" aria-label="Upper tabs">
<tab class="devsite-dropdown
">
<a href="https://firebase.google.com/products-build"
class="devsite-tabs-content gc-analytics-event "
track-metadata-eventdetail="https://firebase.google.com/products-build"
track-type="nav"
track-metadata-position="nav - build"
track-metadata-module="primary nav"
data-category="Site-Wide Custom Events"
data-label="Tab: Build"
track-name="build"
>
Build
</a>
<button
aria-haspopup="menu"
aria-expanded="false"
aria-label="Dropdown menu for Build"
track-type="nav"
track-metadata-eventdetail="https://firebase.google.com/products-build"
track-metadata-position="nav - build"
track-metadata-module="primary nav"
data-category="Site-Wide Custom Events"
data-label="Tab: Build"
track-name="build"
class="devsite-tabs-dropdown-toggle devsite-icon devsite-icon-arrow-drop-down"></button>
<div class="devsite-tabs-dropdown" role="menu" aria-label="submenu" hidden>
<div class="devsite-tabs-dropdown-content">
<div class="devsite-tabs-dropdown-column
firebase-dropdown firebase-dropdown--primary firebase-build">
<ul class="devsite-tabs-dropdown-section
">
<li class="devsite-nav-title" role="heading" tooltip>Build</li>
<li class="devsite-nav-description">Get to market quickly and securely with products that can scale globally
</li>
<li class="devsite-nav-item">
<a href="https://firebase.google.com/products-build"
track-type="nav"
track-metadata-eventdetail="https://firebase.google.com/products-build"
BTLS Certificate Expiry & Recommendations57 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
Recommended actions
- Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
- Enable DNSSEC on your domain for DNS spoofing protection
- Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
ADNS Records1 A records, 54 ms lookupPASS
| A | 199.36.158.100 |
| AAAA | 2620:0:890::100 |
| CNAME | — |
| NS | ns2.googledomains.com, ns3.googledomains.com, ns1.googledomains.com, ns4.googledomains.com |
| MX | — |
| TXT | — |
| CAA | Lookup not available with standard resolver |
Multiple A records provide failover if one server goes down.
Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.
Learn more ▾ ▴
Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.
Source: SRE practice / DNS architecture
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.
Learn more ▾ ▴
SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.
Source: RFC 7208 (SPF)
ARedirect Chain1 redirect(s), 521 ms totalPASS
https://web.app
7 ms · HTTP/1.1
https://firebase.google.com/products/hos...
514 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://web.app | 301 | 7 ms | HTTP/1.1 | |
| 2 | https://firebase.google.com/products/hos... | 200 | 514 ms | HTTP/1.1 | Google Frontend |
See the visual redirect chain in the HTTP Probe tab →
A+IPv6 ReadinessIPv6 reachable (0 ms)PASS
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Consistent
A+Domain Intelligenceweb.app — via MarkMonitor Inc., 7 years, 4 months oldPASS
207 days
January 8, 2027
57 days
Issued by Google Trust Services
7 years, 4 months
Registered January 8, 2019
Not enabled
Protects against DNS spoofing
Unknown
2620:0:890::100
MarkMonitor Inc.
Expiry timeline
Recommended actions
- Enable DNSSEC to protect visitors from DNS spoofing
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.
Learn more ▾ ▴
DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.
Source: ICANN / RFC 4033
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.
Learn more ▾ ▴
Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.
Source: ICANN / domain-security best practice