Free tools
28 free SEO & AI visibility tools
Every tool runs without a login. The ones that check a live site give you a shareable result URL; the rest compute instantly in your browser session and store nothing.
Built by the team behind SERP Checker — the platform that tracks Google rankings and AI-answer visibility (ChatGPT, Claude, Gemini, Perplexity, Copilot, Google AI Overviews) in one workspace.
AI visibility
AI Crawler Access Checker
Can ChatGPT, Claude, Gemini and Perplexity read your site? Checks robots.txt for 10 AI crawlers and validates llms.txt.
Prompt Opportunity Finder
The buyer questions an AI gets asked about your category, generated from what your own pages say you sell.
AI Visibility Score Calculator
Turn raw AI-answer counts into one comparable visibility score, with the formula shown so you can re-derive it by hand.
Share of Voice Calculator
Your mentions against every competitor's, as a share — the metric AI visibility is actually judged on.
Crawling & indexing
LLMS.TXT Wizard
Crawl your site, pick the pages worth quoting, and get a validated llms.txt draft for answer engines — ready to review and download.
robots.txt Generator
Build a robots.txt that says something deliberate about AI crawlers — allow all, block training only, or block everything.
llms.txt Generator
Generate the llmstxt.org file that tells answer engines which of your pages to read first.
Robots Meta Tag Generator
Build the meta robots tag and the matching X-Robots-Tag header, with each directive explained.
Hreflang Tag Generator
Generate a valid hreflang block from a list of language / URL pairs, and catch the malformed codes before they ship.
Canonical URL Generator
Strip tracking parameters and normalise a messy URL into the canonical form you actually want indexed.
Search appearance
Schema Readiness Checker
Does your markup tell an answer engine who you are? Reads the JSON-LD on a live page and names what is missing.
SERP Preview Tool
See how your title and description get cut on desktop and mobile — measured in pixels, which is how Google actually truncates.
Meta Tag Generator
Produce the full head block — title, description, canonical, Open Graph and Twitter cards — from four fields.
FAQ Schema Generator
Turn question and answer pairs into valid FAQPage JSON-LD — the markup answer engines lift most readily.
Content analysis
Word Counter
Words, characters, sentences, paragraphs and reading time — counted correctly for Cyrillic as well as Latin text.
Character Counter
Characters, characters without spaces and real UTF-8 bytes, checked against the limits that actually truncate you.
Readability Checker
Flesch Reading Ease and Flesch–Kincaid grade, plus the exact sentences that are dragging the score down.
Keyword Density Checker
Density for a focus phrase plus the top single words, pairs and triples the page actually repeats.
Keyword Extractor
Pull the terms and two-word phrases a page is really about, ready to paste into a tracker.
Text Diff Checker
Compare two versions of a page and see exactly which lines changed.
Duplicate Content Checker
Measure how much of one page is copied from another, passage by passage.
Keyword planning
Keyword List Cleaner
Trim, normalise, de-duplicate and sort a keyword export in one pass.
Keyword Clustering Tool
Group a keyword list into clusters that share meaning — one cluster is one page, not one page per keyword.
Keyword Cannibalization Checker
Find the keywords two of your own URLs are fighting over, from a keyword-to-URL mapping you already have.
URL utilities
UTM Campaign URL Builder
Build correctly tagged campaign URLs, and get told when a parameter you left empty will show up as (not set) in GA4.
URL Encoder / Decoder
Percent-encode or decode a URL or a single parameter value.
URL Slug Generator
Clean, lowercase, ASCII slugs — including from Russian and Ukrainian titles, which most generators return empty.
Planning & measurement
These tools answer one question each. The product answers the whole one.
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