Free SEO Optimization Tools

30 Free SEO Tools

Free SEO Optimization Tools

A complete toolkit of free SEO optimization tools for meta tags, schema markup, robots.txt, sentence expansion, bulk domain & link checks, headings, and content analysis - all in your browser, with zero sign-up and zero cost.

30 Tools, One Place
No juggling tabs or accounts
100% Free Forever
No credit card, ever
Instant Results
Most checks run in seconds

Want the Full Picture?

These utilities solve one problem at a time. Run our complete audit engine to check your entire site across 196+ points in one pass.

196+Checkpoints
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Check SEO Optimization
White Label • Your Brand • Your Domain

Technical SEO & Crawlability Tools

Whether search engines can find, crawl, and index every page on your site. These 8 tools catch orphaned pages, broken links, bad status codes, and sitemap/robots.txt errors before they cost you rankings.

Read the full guide to Technical SEO checks

Sitemap Generator

Build an XML or HTML sitemap from your own URL list - no crawling, 4 XML types & 4 HTML templates.

Robots.txt Generator

Build a valid robots.txt file with User-agent, Allow/Disallow & Sitemap directives, plus instant verification.

Orphan Page Checker

Crawl up to 500 pages of one domain and find pages with zero internal links.

Broken Link Checker

Check one page or crawl an entire site for broken links & broken images, with source page and anchor text.

Bulk HTTP Status Code Checker

Up to 50 URLs: live HTTP status code, redirect chain, response time & server header.

Bulk Page Index Checker

Up to 50 URLs: get a Google & Bing site: search link for each page.

Website CMS Checker

Detect the CMS, e-commerce platform, or framework any website is built on - WordPress, Shopify, React, Laravel & more.

SEO Silo Structure Checker

Crawl a domain, map its topical silos, and score cross-silo internal link leakage from 0-100.

On-Page Content Tools

Whether the content on a page is written, structured, and worded to rank and convert. Optimize titles, headings, keyword usage, readability, and image alt text page by page.

Read the full guide to On-Page SEO checks

Meta Tags Generator

Optimized title tags, meta descriptions & canonical tags with a live SERP preview.

Heading Tags SEO Checker

Get a URL's full H1-H6 outline and check heading nesting against WCAG 1.3.1.

Keyword Density Checker

Density for every word & phrase plus a 0-100 keyword optimization score: heading/alt/anchor over-concentration, repeated phrases & keyword-list stuffing.

Content Readability Checker

6-formula 0-100 readability score for any URL or pasted text, with passive voice & sentence-length highlighting.

Semantic Content Analysis Tool

Score a URL's semantic SEO: topical depth, schema markup, semantic HTML5 usage, and topic coverage.

Sentence Expander

Paste a sentence, pick a tone & target length, and get a longer, naturally written AI expansion.

Google Docs Word Counter

Live word, character, reading-time & keyword density stats - paste text or fetch a public Google Docs link.

Image SEO Analyzer

Score every image's alt text, file name, format & dimensions, plus a live check for broken or oversized files.

Structured Data Tools

Whether your markup tells search engines and social platforms exactly what a page is. Build and validate schema, breadcrumbs, and Open Graph tags for richer search and social results.

Read the full guide to Schema Analysis checks

Schema Markup Generator

Build valid JSON-LD structured data for Article, Product, FAQ, HowTo & 9 more schema.org types.

Breadcrumb Schema Generator

Build a BreadcrumbList schema, HTML & CSS from one trail, or auto-build from a URL and audit its existing breadcrumb schema.

Open Graph Tester

Check og: & twitter: tags, validate og:image size, preview social share cards.

Trust & Performance Tools

Whether your site is fast, secure, and usable enough to keep the trust it earns. Test page speed, mobile responsiveness, TLS and security headers, and publish a security.txt disclosure policy.

Read the full guide to Technical SEO checks

Website Safety Checker

0-100 safety score from HTTPS enforcement, a real TLS handshake, security headers, cookie flags & mixed content.

Security.txt Generator

Build an RFC 9116 security.txt file with Contact, Expires, Encryption & more, with live spec validation.

Page Speed Test

Live response time, page weight, request count, compression & caching, with a 0-100 speed score.

Website Responsiveness Checker

Live multi-device preview plus a 0-100 responsiveness score from real viewport, media query & layout signals.

Off-Page & Domain Tools

What your domain's outside reputation and link profile look like. Check backlinks for dofollow/nofollow status, and pull WHOIS age and IP data for any domain.

Bulk Dofollow Link Checker

Up to 50 URLs: check if each page links to your domain, and whether it's dofollow or nofollow.

Bulk Domain Age Checker

Up to 50 domains: WHOIS registration date, age, expiry & registrar.

Bulk Domain IP Checker

Up to 50 domains: IPv4, IPv6 & reverse DNS hostname via live DNS lookups.

The Complete Guide to Free SEO Optimization Tools

Search engines reward sites that get the fundamentals right: clean metadata, valid structured data, healthy internal links, and readable, well-organized content. AudEsto's free SEO optimization tools handle each of these fundamentals individually, so you can fix issues in minutes instead of waiting on a full audit.

What Are Free SEO Optimization Tools?

Free SEO optimization tools are single-purpose utilities that solve one specific ranking factor at a time - generating a meta description, validating a robots.txt file, checking heading structure, or confirming a page is indexed. Unlike a full site audit, each tool on this page runs a focused check in seconds, with no account, credit card, or install required.

Why Free Tools Matter for Small Sites & Agencies

Enterprise SEO suites can cost hundreds of dollars a month, putting them out of reach for solo site owners, small businesses, and freelancers managing a handful of client sites. AudEsto's free SEO optimization tools give you the same checks - meta tag validation, schema generation, bulk domain and link audits - without a paywall, so budget is never the reason a technical issue ships to production.

How to Choose the Right Tool for the Job

Start with the fundamentals: run the Meta Tags Generator and Heading Tags SEO Checker on any new page before it publishes. Use the bulk checkers (HTTP status, dofollow links, domain age, domain IP) when auditing an existing site or vetting backlink prospects at scale. Reach for the Schema Markup Generator and Semantic Content Analysis Tool when you're optimizing for rich results and AI answer engines specifically.

From Quick Fixes to a Full Site Audit

These utilities are built on the same crawling and analysis infrastructure as AudEsto's complete SEO audit engine. When a quick check surfaces a deeper problem - or you simply want every ranking factor checked in one pass - run a full audit to get a 196-point, white-label report covering technical SEO, Core Web Vitals, schema, and AEO/GEO readiness.

Go Deeper
Run a Full White-Label SEO Audit
Check technical SEO, Core Web Vitals, schema, and AEO/GEO readiness across your entire site in one 196-point report.

Frequently Asked Questions

Free SEO optimization tools are no-cost web utilities that check or generate a single ranking factor - meta tags, structured data, robots.txt rules, heading structure, backlinks, or indexing status - without requiring a paid subscription or account.
Yes. Every tool on this page is free to use with a generous daily usage allowance, and no credit card or account is required to get started.
For a single new page, start with the Meta Tags Generator and Heading Tags SEO Checker. For an existing site, the Bulk HTTP Status Checker and Orphan Page Checker are the fastest way to catch broken links and unlinked pages.
Yes. Every tool works on any live, publicly accessible URL regardless of the CMS or framework behind it - WordPress, Shopify, Webflow, or a custom-built site. The Website CMS Checker can even tell you which platform a competitor's site is running on.
Each utility here checks one ranking factor in isolation and returns results in seconds. The full AudEsto audit engine runs all of these checks together, plus Core Web Vitals, technical crawlability, and AEO/GEO readiness, in a single 196-point white-label report.
No installation is required. Every tool runs directly in your browser or on AudEsto's servers - just open the tool, enter a URL or your content, and get results instantly.