Free SEO Tools — Precise, No Bloat
On-page SEO, Technical SEO, Analytics, GEO, structured data, and international — 29 precise tools, no paywall, built by SEO experts. Free account unlocks tool history, AI-powered generators, and the ability to vote on and suggest what we build next.
Technical SEO
9 toolsRobots.txt Validator & Bulk URL Tester
Fetch any site's robots.txt, then test up to 100 URLs against it for Googlebot, Bingbot, GPTBot and more — see the exact rule and line number blocking each page.
Bulk URL HTTP Status Checker
Check HTTP status codes and response headers for multiple URLs at once — spot redirects, errors, and chains instantly.
XML Sitemap Checker
Validate XML sitemaps with 28 checks — invalid XML, fake lastmod, noindex pages, redirects, and more. Enter your domain and we'll find your sitemap automatically.
Bulk Indexability Checker
Check up to 50 URLs for Googlebot and Bingbot indexability. Verifies HTTP status, robots.txt, meta robots, X-Robots-Tag, and canonical — with conflict detection.
Bulk Redirect Checker
Upload your old→new URL map after a migration and check every redirect — status code, destination, and final response — in one pass.
CMS & Tech Stack Detector
Enter any URL to detect the CMS, JavaScript framework, analytics tools, and CDN. Covers WordPress, Shopify, Webflow, Next.js, Wix and 20+ more. Every detection shows the exact signal that triggered it.
Bulk Schema Audit Tool
Paste up to 10 URLs to audit Schema.org markup in bulk. See which types competitors use that your page doesn't — type matrix, property gap analysis, and action summary.
Hreflang Tag Generator
Generate hreflang tags for your international pages. Dynamic row builder with BCP 47 validation, UK→GB detection, 5 presets, and output in HTML, XML sitemap, and HTTP header formats.
Hreflang Checker
Check hreflang implementation for 18 common errors — invalid codes, missing return tags, noindex conflicts, html lang mismatches — in one click.
On-Page SEO
8 toolsGoogle SERP Simulator
Preview exactly how your title tag and meta description look in Google search — real-time, pixel-accurate, with favicon and the current 2026 snippet design.
Keyword Density Checker
Analyze the frequency and density of keywords on any webpage to detect keyword stuffing and find LSI phrases.
Title, Meta Description, H1 Checker
Check title tags, meta descriptions and H1-H6 headings for up to 20 URLs at once — pixel widths, char counts, heading tree and word frequency.
Schema Markup Generator
Generate valid JSON-LD schema markup for 16 types — Article, FAQ, Product, LocalBusiness, Event, and more. Live preview, required-field validation, one-click Rich Results Test.
Open Graph & Social Preview Checker
Check Open Graph and Twitter Card tags for any URL. Preview exactly how your link looks on Facebook, X/Twitter, LinkedIn, Slack, Discord, WhatsApp, and iMessage. Detect missing tags with one-line fixes.
Schema Markup Validator
Validate JSON-LD schema markup from a URL or paste. Checks required fields, date formats, and rich result eligibility for all 16 major schema types.
Meta Description Generator
Generate three CTR-optimised meta description variants from your page content or URL. Three distinct angles — direct, benefit-led, curiosity — with live character counter and SERP preview.
SEO Title Tag Generator
Generate 3 keyword-frequency-optimised title tag variants. Add your keywords or upload a GSC export, add competitor pages, and get titles built from word frequency analysis — the same method SEO specialists use manually.
AI & GEO
4 toolsRobots.txt Validator & Bulk URL Tester
Fetch any site's robots.txt, then test up to 100 URLs against it for Googlebot, Bingbot, GPTBot and more — see the exact rule and line number blocking each page.
AI Bot Access Tester
Test how GPTBot, ClaudeBot, PerplexityBot, and 18 more AI crawlers access your URL. Checks robots.txt rules, live HTTP access, and X-Robots-Tag headers.
AI & LLM Visibility Checker
Get live AI responses from ChatGPT, Gemini, and Perplexity for any prompt — see cited sources, cited domains, fan-out queries, and which competitor brands they recommend.
Google AI Mode Checker
See the full Google AI Mode response for any keyword — the AI-generated answer, every cited source, and which domains Google trusts most. Live results.
Converters
3 toolsWord to Markdown Converter
Convert any Word document to clean, GitHub-Flavored Markdown in seconds. No account, no server upload — everything runs privately in your browser.
PDF to Markdown Converter
Convert any PDF to clean Markdown instantly. Headings, lists, and bold text preserved. No file upload — runs entirely in your browser using PDF.js.
HTML to Markdown Converter
Convert any HTML to clean, GitHub-Flavored Markdown instantly. Paste HTML, get Markdown — no upload, no signup, runs entirely in your browser.
Analytics
5 toolsGoogle Algorithm & AI Update Tracker
Track every confirmed Google Search algorithm update since 2003. Core, spam, AI milestones and more — live-synced from Google's Status Dashboard, with a real-time rolling banner.
Domain Age & History Checker
Check any domain's registration date, Wayback Machine first-seen, first SSL certificate, and current HTTP status — all in one free lookup.
UTM Campaign URL Builder
Build UTM-tagged campaign URLs in seconds. Channel presets for Google Ads, Meta, Email, LinkedIn and more — with GA4 channel mapping, inline validation, UTM decoder, and QR code generation.
Schema.org Usage Statistics
See which schema.org types are actually deployed across the web — 958 types ranked by adoption tier from 10M+ domains down to rare types. Data from Google's public monthly dataset.
Google SERP Checker
Check live Google search results for any keyword. Target any country, state, or city — see organic rankings, AI Overviews, and featured snippets up to 200 results deep.
The right tool for the right job — whoever you are
Whether you're optimising your first page or auditing hundreds, SERP.tools gives you accurate answers without the friction.
SEO Specialist
Preview and compare snippet variants before pushing live — so your title and meta are optimised before the page is indexed.
Content Writer
Check character and pixel limits as you draft — so your headline won't be truncated in search results before anyone reads it.
Web Developer
QA meta tags, HTTP responses, and crawl rules across staging environments — before a broken redirect or blocked page reaches production.
Marketing Manager
Review and approve page snippets before content goes live — compare headline variations side by side with pixel-accurate previews.
Why SERP.tools?
Precision tools. Zero friction.
Built for accuracy
Every result is precise. SERP.tools calculates pixel widths using the same Arial font sizing Google uses — not character counts. HTTP status checks return real server responses, not cached estimates. You see what search engines see, not an approximation.
Free to use, always
The core tools on SERP.tools are free and will stay that way. No trial period, no usage cap that quietly resets, no paywall after five checks. Open a tool and start. More tools and higher limits will be available for registered users — but the fundamentals are free, permanently.
Crafted to do less, better
SERP.tools is not a directory of utilities. Each tool is built by practitioners who use it themselves, focused on one specific problem, and designed to give you the answer without making you wade through noise. Fewer tools. Sharper results.