The best free SEO tools in 2027, with the real limits written down

“Free SEO tool” covers three very different things: tools that are genuinely free with no cap worth worrying about, free tiers designed to be outgrown, and trials described as free. This page only lists the first two, and says which is which. Trials that need a card are not free tools.

All twelve at a glance

Limits checked September 2026. Free tiers change without notice more often than paid plans; if one has tightened, let me know.

For your own site's data

Google Search Console

If you install one tool, install this. It shows the queries your pages appear for, impressions, clicks, average position, indexing problems and Core Web Vitals, with around sixteen months of performance history. Every paid tool shows estimates of this; Search Console shows what actually happened. Its limitation is scope: your verified sites only, nothing about competitors.

Bing Webmaster Tools

The same idea for Bing, plus a site scan and keyword research. Bing's share is smaller than Google's, but the setup takes minutes (it can import a site already verified in Search Console), and it occasionally surfaces issues Google's report does not emphasise.

Ahrefs Webmaster Tools

Ahrefs' site audit and backlink data, free, for domains you verify. It is the most generous free offer from a paid SEO vendor, and the catch is intentional: no competitor research, which is what the paid plans sell.

For keyword research

Google Keyword Planner

Free inside a Google Ads account. Accounts that are not running campaigns typically see volume as broad ranges (“1K–10K”), rather than exact figures. That is enough to rank keywords against each other, which is most of what keyword research is for.

Google Trends

No absolute volumes, but the best free way to see whether interest is growing, seasonal or fading, which a single monthly volume figure hides.

Ubersuggest (free tier)

A limited number of free searches per day, with keyword ideas and difficulty. Useful for a quick session; the paid plan starts at $29 a month or $290 for a lifetime licence.

Semrush free account

A small daily allowance of reports. Enough to glance at a competitor, not enough to work in. It exists to show you what Pro at $139.95 would unlock.

For technical checks

Screaming Frog SEO Spider

The standard desktop crawler, free for up to 500 URLs per crawl, more than enough for most small sites. Broken links, redirects, missing titles, duplicate content. A licence at about £199 a year removes the limit and adds JavaScript rendering and integrations.

PageSpeed Insights

Google's own speed and Core Web Vitals report for any URL, with field data where Google has it. Free, no account.

For content

Rank Math (free plugin)

For WordPress sites: titles, meta descriptions, schema and basic on-page checks while you write. Rule-based rather than based on what currently ranks, but a solid free baseline.

Surfer's free Chrome extension

Keyword data and quick outlines inside Google results, without a Surfer subscription.

GrowGanic (free tier)

The one free tool here that produces content rather than analysing it: one project, one article researched, written, scored and published, with no card. It is capped at a single article on purpose: a way to judge the output, not a free content plan. One detail worth knowing: by GrowGanic's own account, the hosted copy of the free article stays out of Google until the plan is paid; connecting your site or a subdomain before the first article avoids that. Try the free tier (affiliate link).

A complete free stack in an afternoon

1. Verify your site in Search Console; submit your sitemap.
2. Import it into Bing Webmaster Tools.
3. Verify it in Ahrefs Webmaster Tools and run the first audit.
4. Crawl it with Screaming Frog and fix broken links and missing titles.
5. Check your three most important pages in PageSpeed Insights.
6. Plan your next topics from the Search Console queries where you sit on page two, sanity-checked in Keyword Planner and Trends.

What free tools cannot do

• Reliable competitor research. Collecting it is expensive, so nobody gives much of it away.
• Precise keyword volumes for sites that do not advertise.
• Produce content at volume. Free tiers that write are capped at a sample.

When you hit one of those walls, the cheapest paid tools that work is the next step: most useful paid tools start under $50 a month.

Frequently asked questions

Related

Last reviewed 20 October 2026.