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Generators

Build files and markup. Runs in your browser.

Checkers

Check a live URL and see what came back.

Search preview

See how a title and description truncate in Google results on desktop and mobile. Approximate: Google may rewrite either one.

Core Web Vitals checker

Lab Lighthouse and field Chrome UX Report data from Google PageSpeed Insights.

Content phrase inspector

See which words and phrases your page actually repeats. There is no target percentage.

Domain rating checker

Look up Domain Rating for a host. An Ahrefs metric, not a Google ranking factor.

AI crawler checker

See which AI crawlers can read your URL — ChatGPT, Claude, Perplexity and more. Find fixable blocks before you miss citations. Free, no sign-up.

Schema / Rich Results validator

Validate JSON-LD schema. A Rich Results Test alternative: eligible, ineligible, or not applicable. Free, no sign-up.

Broken link checker

Check every link on one page and see which ones fail. Internal and outbound, status by status. Free, no sign-up.

Redirect chain checker

Follow every hop a URL takes and see the chain, the loops, and the final destination. Free, no sign-up.

Social and search preview

One URL, previewed as Google, Facebook, X, LinkedIn, WhatsApp, and Slack would show it. Free, no sign-up.

robots.txt tester

Does this URL get blocked, for this crawler? Test the real file against a real path. Free, no sign-up.

Sitemap validator

Fetch a sitemap or sitemap index and check every URL entry: the XML, the limits, and where the URLs actually land. Free, no sign-up.

Page speed comparison

Two URLs, the same Lighthouse run each, side by side. Free, no sign-up.

HTTP header inspector

Every response header for a URL, with the security and caching headers explained. Free, no sign-up.

Mixed content checker

Find HTTP resources loaded by an HTTPS page, which browsers block or warn on. Free, no sign-up.

Canonical checker

Read the canonical a page declares, and what it points at. Free, no sign-up.

Structured data extractor

Every JSON-LD entity on a page, nested and readable, with the types and properties as published. Free, no sign-up.

Heading checker

List every H1–H6 on a page in document order, with the H1 count, empty headings, and level jumps shown as observations, not errors. Free, no sign-up.

HTTP status code checker

Check the HTTP status code of up to 10 URLs at once: the final code, every redirect hop with its Location, response time, and the headers that explain it. Free, no sign-up.

Checklists

Step-by-step lists to work through.

AI search

See how AI search engines treat your pages.

Audit your site in one command

Every tool here checks one thing. The audit checks them together and ranks what to fix first. Run it from your terminal, your coding agent or CI.

Every integration
terminal
# Free, no account: score and top issues, 1 page a day
$ npx crawlwise audit https://your-site.com

Node 22+. Nothing to install. Add CRAWLWISE_API_KEY for every fix and its evidence.