Free tools for any website.
One URL in, one answer out. No login, no email, nothing stored about you. Each tool answers a question people search for, then shows the way out: fix it with TagFrog Pro, keep it fixed with Watch, get online for $499 if there is no site yet, or, for agencies, the same check for every business in a territory at OpsBlu.
Runs all 14 site checks at once and puts every result on one page. No login, nothing stored about you.
What to do about it
The report found it. These are the ways to fix it, keep it fixed, or run the same checks for every business you serve.
TagFrog Pro
Server-side tracking, consent and every ad platform API, proven with a real test order and kept current. Watch included when it launches.
See TagFrog ProWatch
Re-runs this check every week and emails you the moment the answer changes: site down, tag gone, score dropped, certificate expiring.
Join the waitlistWebsite
No website yet? $499, live in two days, or rebuild a tired one for the same price. Hosting and TagFrog on from day one, Watch when it launches, changes by chat, never a call. Have an agency? They can resell this.
Get online, $499OpsBlu
This same check, run for every local business in a territory. Leads with a reason to call, as CSV, API and MCP.
Go to opsblu.comSite tests
One URL in, a report out. Each answers in a couple of seconds.
Security headers check
LiveSecurity headers checker. Grades HSTS, CSP, X-Frame-Options, nosniff, Referrer-Policy, Permissions-Policy and cookie flags for any URL and shows the exact header to add.
cost: 1 requestrobots.txt tester
LiveRobots.txt tester. Parses every rule, shows what Googlebot and other crawlers can reach, flags a site-wide Disallow and checks your Sitemap lines.
cost: 1 requestSitemap validator
LiveXML sitemap validator. Finds and parses your sitemap or sitemap index, counts URLs, checks hosts, lastmod dates and size limits, and samples listed pages for errors.
cost: 1-2 requestsSERP preview
LiveGoogle SERP preview. See how your title and meta description render in search results, where they truncate, and whether canonical, robots and Open Graph tags are set.
cost: 1 requestWebsite carbon footprint
LiveWebsite carbon calculator. Measures the bytes one page view transfers, converts it to grams of CO2, grades the page A+ to F and lists the heaviest resources.
cost: 1 fetch + byte countImage bloat scan
LiveImage bloat scanner. Lists every image on a page with its bytes, format and dimensions, sorted by how much you would save with WebP and correct sizing.
cost: fetches every image on the pageTag drag race
LiveTag drag race. Ranks every third-party script on your page by the load time and bytes it costs, finds duplicates and blocking tags, and shows what is worth keeping.
cost: 1 fetch + script timingTracking audit
LiveTracking audit. Shows every analytics and ad platform firing on a page, their IDs, how they load, and whether consent mode and your cookie banner actually gate them.
cost: 1 fetchGTM analyzer
LiveGTM container analyzer. Enter a site URL or GTM ID and see every tag, trigger and variable, what fires, dead and duplicate tags, consent settings and destinations. No login.
cost: 1 fetch of the containerSEO score
LiveOn-page SEO score. Checks title, description, headings, canonical, robots, structured data, alt text, links and indexability for any URL and tells you what to fix.
cost: 1-3 requestsSite health check
LiveWebsite health check. Finds broken links, mixed content, missing favicon, soft 404s, missing contact and privacy pages and other basics a visitor or crawler trips over.
cost: 1-3 requestsSecurity audit
LiveWebsite security audit. Checks TLS and certificate expiry, DNS and email authentication records, exposed admin and backup paths, version leaks and security headers from the outside.
cost: TLS + headers + DNS, a few requestsIs it up?
Live"Is it up" check. Tests http, https, www and bare domain, follows every redirect and shows status, final URL and response time for each variant.
cost: 1-4 requestsPerformance score (Lighthouse)
Coming soonLighthouse performance score for mobile and desktop with Core Web Vitals and the three slowest things on the page. Queued and sent to your email.
cost: Chrome ~30 sAccessibility check (axe)
Coming soonAccessibility check with axe-core. Lists WCAG violations on a rendered page with the element and the fix. Queued and sent to your email.
cost: Chrome ~10 sContrast heatmap
Coming soonContrast heatmap. Paints every text element that fails WCAG contrast over a screenshot of your page. Queued and sent to your email.
cost: Chrome renderWatch this
Coming soonWatch this: re-run any free tool on a schedule and get told when the answer changes. Uptime, tags, scores, certificates. Coming soon; join the waitlist.
cost: subscriptionWhat does this site run
CMS, frameworks, analytics, pixels, hosting and CDN, from one fetch.
Calculators
Marketer math that runs in your browser. Nothing is sent anywhere.
Ad budget calculator
LiveAd budget calculator for Google, Meta and TikTok. Enter AOV, margin, conversion rate and CPC to get break-even CPA, monthly budget and projected ROAS.
cost: 0, runs in your browserROAS calculator
LiveROAS calculator. Return on ad spend, break-even ROAS from your margin, true profit after COGS and blended ROAS across channels.
cost: 0, runs in your browserUTM builder
LiveUTM builder. Generate tagged campaign URLs for Google, Meta, TikTok and email with lowercased, encoded values that keep GA4 reports clean.
cost: 0, runs in your browserImage converter
Coming soonIn-browser image converter to WebP and AVIF with resizing. Nothing is uploaded. Coming soon.
cost: 0, runs in your browserGA4 event names reference
LiveSearchable list of every GA4 event: automatically collected, recommended ecommerce, lead gen and custom, with parameters.
cost: 0, a reference pageHow the tools work
Every tool is one URL in, one answer out. We fetch the page once, the way a browser would, and run the check on what came back. The whole thing takes a couple of seconds and the result is a page you can link to. "Run everything" above runs all 14 site checks at the same time and puts every result on this page.
Three tools (Lighthouse, accessibility, contrast heatmap) need a real browser render, so they go through a queue and you get the result by email. They are marked coming soon until that queue is live.
Nothing here needs an account. If you want a check re-run every week and an alert when the answer changes, that is Watch, $19/mo per site, coming soon. Watch included when it launches with TagFrog Pro and with a Website.
Questions
Are these tools really free?
Yes. 17 tools run now with no login, no email and no limit beyond a per-address rate cap so one script cannot hog the service. The queued ones (Lighthouse, axe, contrast) need a browser render and ask for an email to send the result to.
What happens to the URL I enter?
We fetch the page once like a browser would, run the check, and cache the result for a few minutes so repeat runs are instant. We do not store anything about you. Results for a domain may be kept so the next person who checks it gets an answer without a fetch.
Why do the results end with TagFrog, Watch, Website and OpsBlu?
Those are the things we sell, and the tools are how we show the work. The tool finds what is broken. TagFrog Pro ($75/mo per store) fixes tracking. Watch ($19/mo per site) re-runs the checks weekly so it stays fixed. A Website ($499 build + $39/mo) gets a business with no site online, or rebuilds one that scored badly. OpsBlu holds these same checks for every local business, by territory, for agencies. None of them is required to use the tools.