A proper technical SEO audit takes 4–16 hours and needs Screaming Frog, GSC access, Webmaster, GA. But 80% of the time you don't need a full audit — you need a fast sanity check: "is anything critically broken right now". This workflow fits in 15 minutes using only the free online SEO tools at /tools, with no logins, no subscriptions. Good for three scenarios: first look at a new client site, post-release express check, and bi-weekly self-audit.
Minutes 1–3: homepage in Meta Tags Checker
Open /tools/meta-tags-checker, paste the homepage URL. Check six items. Title — present and 50–60 chars. Description — present and 140–160. Canonical — points to itself (not http or /index.php). Open Graph — og:title, og:description, og:image present (for socials). Hreflang — for a bilingual site, alternates declared. Schema.org — JSON-LD of type Organization or WebSite present. All six green = homepage healthy, move on.
Minutes 4–5: robots.txt Validator
Open /tools/robots-txt-validator, enter domain.com. The tool pulls robots.txt, parses and checks three things. One — no Disallow: / for all bots (would block the whole site). Two — Sitemap reference present. Three — no conflicting rules between Googlebot and Yandexbot. Two minutes tell you whether crawling is sane. The most common catch — a forgotten staging Disallow: /.
Minutes 6–8: Sitemap Validator
Open /tools/sitemap-validator, paste the sitemap URL (usually domain.com/sitemap.xml). The tool validates XML schema, URL reachability (200 or 404), lastmod correctness. If it's an index, it unrolls all children. Three minutes for "all OK" or "issues here". Typical find: 50–100 sitemap URLs that actually return 404 — common after old articles are deleted without rebuilding the sitemap.
Minutes 9–11: PageSpeed Tester
Open /tools/pagespeed-tester, enter the homepage + one typical inner page (a blog post or product). Read Core Web Vitals: LCP ≤ 2.5s, INP ≤ 200ms, CLS ≤ 0.1. Measurement comes from CrUX field data — real users over 28 days. Green zone = great. LCP in the red (> 4s) — critical problem, usually a heavy image or slow TTFB. INP in the red — interaction issue, hunt down heavy click handlers.
Minutes 12–15: SERP Checker on two keywords
Open /tools/serp-checker, enter your two top commercial queries (the ones driving most conversions) and check positions in Yandex and Google. Both in top 20 — positions healthy, audit done. Dropped — needs deeper analysis: what changed on the page, was there an algorithm update, did a stronger competitor appear? Free limit — 5 checks per hour, two keywords fit easily.
What to do when something pops
Any red from these 15 minutes is the basis of a concrete ticket: "Homepage title > 70 chars, truncates in SERP — rewrite", "47 sitemap URLs return 404 — regenerate", "Mobile LCP 4.8s — optimise hero image". That's the best part of a fast audit: no 40-page report, just 3–5 concrete tasks for the next sprint. For deeper analysis, layer in Site Metrics Tool's full monitoring or a separate Screaming Frog audit.
Regular check vs one-off
Running this workflow once is useful. Running it bi-weekly on the same site is a waste. For regularity you need automation: each of the 15-minute steps can be automated via Site Metrics Tool. We check robots.txt daily, sitemap daily, Core Web Vitals daily, positions on the top 100 keywords every 6 hours. All alerts arrive as a single daily email digest, not a spam stream. The free plan covers this for 1 project and 5 keywords. The idea: free tools for one-offs and audits of other people's sites, the main account for your own site under full monitoring.
Frequently asked
Will a 15-minute audit replace a full technical audit?
No. A full audit covers 30+ items including internal-link structure, canonical chains, hreflang across all pages, schema markup by type. 15 minutes is the "anything on fire" baseline. Different jobs: express check vs deep inventory.
Does the workflow fit large e-commerce?
For top pages — yes. For 10,000 products — no, you'll need a Screaming Frog crawl and full monitoring. But running the workflow weekly on the homepage, a category, and three top products is a useful sanity check for any e-commerce.
Can I check someone else's site?
Yes, all 5 tools work with any public domain. No Search Console access or admin logins needed. Useful for presales — show up with a ready audit of the prospect's site.
Is it worth running the workflow after every deploy?
After a major release — yes. After a routine bugfix — no, that's noise. A good compromise: Site Metrics Tool's automated monitoring catches changes 24/7, while the manual workflow runs only on significant releases.