Directory/Categories/Security/HSTS preload bot

HSTS preload bot

GoodBotVerifiedBOT

Checks that links can be preloaded for Chromium Operated by Chromium.

Operator website ↗

GoodBot

Assessment

Security

What is HSTS preload bot?

HSTS preload bot is a web crawler operated by Chromium. Checks that links can be preloaded for Chromium

Helpful — Verified, safe crawler. Respects robots.txt and provides operator documentation.

Identification

Bot name

HSTS preload bot

Operator

Chromium

How we rated this bot

Verified by Cloudflare, which confirms who runs it, with no widespread reports of abuse.

Names itself honestly

Yes

Verified by Cloudflare

Yes

Says it follows robots.txt and opt-outs

Not stated

Ignores site rules

None found

Disguises itself or evades blocks

None found

Overloads sites

None found

How widely people complain

No complaint about this bot in the evidence

Reddit discussion

There is no Reddit discussion of this bot in the evidence

What we read

Why it crawls your site

HSTS preload bot crawls websites to collect and process web content. It is operated by Chromium as part of their web crawling infrastructure. If you see this bot in your server logs, it is a verified crawler and generally safe.

Block or allow HSTS preload bot

Block it

Add a Disallow rule for hstspreload-bot in your robots.txt file. You can also block at the server level using your web server configuration or CDN firewall rules to filter requests matching the user-agent string.

# Block HSTS preload bot from crawling your entire site
User-agent: hstspreload-bot
Disallow: /

# Allow HSTS preload bot full access
User-agent: hstspreload-bot
Allow: /

Allow & verify

Ensure your robots.txt allows hstspreload-bot. Verify requests are genuine by checking the user-agent string and referring to Chromium's documentation.