Built because we needed them

Free tools for developers and SEOs

All free, and no sign-ups. The browser tools work locally, so your data never leaves your PC.

Six tools to check your site

Is your site legible to machines?

Each tool answers a single question. When run through from left to right, you've covered the whole path, from the first request a crawler makes, to how an AI assistant introduces you.

Getting in

Robots.txt Tester

Can crawlers, and AI crawlers, get in at all?

Check

Sitemap Validator

Are you telling them what exists, and when it changed?

Check

Being found

SERP Snippet Preview

How does the page look in a Google result?

Check

Structured Data Inspector

What does the page declare itself to be?

Check

Being understood

Social Preview Tester

What card appears when someone shares it?

Check

llms.txt Validator

How does the whole site introduce itself to AI?

Check

Every tool runs in your browser. We don't gather, store, or sell your data - we're just not that interested in you, sorry ;)