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Is your website healthy and search-ready?

Audit any public site for SEO, AI search readiness, performance, accessibility and security. 55 checks, the evidence behind every verdict and a plan for what to fix first. Free, no account.

Audit a website

Any public page. 55 checks across SEO, AI search, speed, accessibility and security, with the evidence behind each one.

A bare domain works. Pages behind a login cannot be audited.

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What to check

Six questions, one report

What the 55 checks answer, each with its cause, its fix and its references.

See every check
Is it healthy?Status codes, redirects, broken links, HTTPS, robots.txt and the sitemap.10 checksIs it discoverable?Titles, descriptions, headings, canonicals, previews and structured data.16 checksCan AI assistants read it?AI crawler rules, firewall blocks, llms.txt and content without JavaScript.7 checksIs it fast?Core Web Vitals on a throttled phone, page weight, caching and compression.9 checksIs it accessible?Contrast, labels, accessible names, landmarks and ARIA.5 checksIs it configured correctly?Security headers, mixed content, cookies and the certificate.8 checks

Most popular free tools

Single-purpose checkers that run a few targeted checks in seconds.

View all 26 free tools
SEO CheckerFind the technical problems that keep a page out of search results. The checker reads the page the way a search crawler does and lists what to fix first, with the evidence behind every verdict.AI Crawler CheckerFind out whether ChatGPT, Claude, Perplexity and other AI assistants can read your site. The checker reads your robots.txt rules for each AI crawler and requests the page with each crawler's user agent, so a firewall block shows up too.Robots.txt CheckerCheck that robots.txt is published, parses cleanly and does not block the pages you want found. See at a glance which search engines and AI crawlers the rules allow.Meta Tag CheckerSee the title and description a search engine reads, how the result could look, and whether the canonical, robots, viewport and language tags are set correctly.Page Speed TestMeasure how fast a page answers and renders on a throttled mobile profile, and find the causes: heavy pages, missing compression, uncached assets and render blocking scripts.Security Headers CheckerSecurity headers tell browsers to stay on HTTPS, refuse to be framed, stop guessing content types and limit what scripts may do. Check which ones your site sends and how they are set.

Hear about it the day it breaks

A deploy adds a noindex, a plugin rewrites robots.txt, a CDN rule starts blocking AI crawlers. A monitor re-audits the site on a schedule and alerts you when the score drops or a critical check starts failing.

  • Slack
  • Discord and webhooks
  • Email
Start monitoring, freeHow it works

The same engine, as an API

A REST API and an MCP server, free and without a key. Run audits, read reports as JSON or Markdown, compare two runs and create monitors from your agent or your CI.

{"mcpServers":{"aback-audit":{"url":"https://abackaudit.com/api/mcp"}}}
Read the API docsCheck registry

Fix what the audit finds

Practical guides, from the technical SEO checklist to AI search readiness.

Read every guide
Technical SEOThe technical SEO checklistA practical technical SEO checklist in the order that matters. Crawling, indexing, on-page signals, structured data, speed, AI search and security, with a way to check each item.Read the guideTechnical SEOWhy your page is not on GoogleA step by step diagnosis for pages that do not appear in Google search. Status codes, robots.txt, noindex, canonical links, rendering, quality and how to ask Google to look again.Read the guideAI searchrobots.txt for AI crawlersWhich AI crawlers exist, what each one does, and how to write robots.txt rules that block model training while keeping your site visible in ChatGPT, Claude and Perplexity answers.Read the guide

55

checks in 7 categories

26

free tools

0

accounts or keys needed

3

sites monitored free

Frequently asked questions

Is Aback Audit really free?

Yes. All 55 checks, the free tools, the reports and monitoring for 3 sites are free, with no account, no API key and no cookie. The Pro plan raises the limits and adds deep audits and daily monitoring. Nothing in the free tier is held back.

How is the score calculated?

Each check earns a point for a pass and half a point for a warning, weighted by severity, so a failed critical check costs far more than a failed low one. The seven category scores are combined into the overall score, and a failing critical check caps it at 59, because a site that asks not to be indexed does not deserve a good score for tidy meta tags.

Does it check whether ChatGPT or Perplexity can read my site?

Yes. It reads what robots.txt says to every known AI crawler, requests the page with each crawler's user agent to catch firewall blocks, and checks that the content is in the HTML, since most AI crawlers do not run JavaScript. It does not claim to predict whether an assistant will cite you.

Will my site be crawled too often?

No. A domain can be audited a few times an hour and one audit at a time, whoever asks. The crawler identifies itself as AbackAuditBot, sends only GET and HEAD requests and honours robots.txt.

How is this different from Search Console or Lighthouse?

Search Console shows what Google decided about your pages. Lighthouse measures one page in your browser. Aback Audit checks any public site from the outside, covers crawling, AI crawler access, structured data, accessibility and security in one report, explains each finding with its evidence, and can watch the site on a schedule.

Can an AI agent use it?

Yes. There is a REST API and an MCP server. An agent can start an audit, read the report as JSON or Markdown, compare two runs and create a monitor, without a browser or a key.

Is my data private?

The audit only sends ordinary requests to the site being audited. Reports can be read by anyone with their link, are never listed publicly and are deleted after 30 days, or 90 on Pro. Your history and monitor links stay in your browser.

Need more than the free tier?

Pro raises every limit sixfold, adds deep audits of 100 pages and daily monitoring of up to 50 sites.

See the pricing
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