Free SEO tools that run in your browser
20 tools that run in your browser, 26 that run on our server, and 2 written methods for keyword research, content, technical checks and budgeting, plus 2 hosted checks that run against a domain you own. No signup and no email gate. The browser tools never send what you paste anywhere; each server tool says what it sends. Written for people running SEO across more than one site.
Hosted checks
The two that need a server, because they fetch the domain you give them rather than the text you paste. Still free, still no account.
AI-readiness check
Nine pass or fail checks on any domain: whether robots.txt is reachable, whether GPTBot, ClaudeBot, PerplexityBot and five other AI crawlers are allowed, whether a sitemap is declared, whether the homepage carries JSON-LD and Organization schema, whether there is an llms.txt or a markdown copy, whether the title and meta description are present, whether there is exactly one h1, and whether robots.txt states a Content-Signal preference.
Reads the homepage, robots.txt, sitemap.xml and llms.txt. Results in seconds, with a link you can share.
Growth plan
Three checkable blocks about a domain you own: what it already ranks for, the keywords within reach, and what is missing on the page. Uses live SERP data, and says so.
Shows the result before it asks anything. No account.
Keyword tools
From a raw list to a plan: cluster, compare, check.
Free Blog Post Ideas From Real Searches
Enter a topic and get blog post ideas drawn from the questions and related searches people actually run, not ideas invented by a model.
Interactive tool, runs on our server
Free Keyword Clustering Tool: Group Keywords by Topic
Paste a keyword list and get topic groups with a page type for each. Free, in your browser, plus the method for confirming groups against the SERP.
Interactive tool, runs in your browser
Free Keyword Combiner: Merge Word Lists Into Keywords
Combine two to four word lists into every keyword variation, with broad, "phrase" and [exact] formatting. Copy or download as CSV.
Interactive tool, runs in your browser
Free Keyword Density Checker: A Diagnostic, Not a Target
See which words and phrases a page repeats, with counts. Plus why an ideal density figure does not exist.
Interactive tool, runs in your browser
Free Keyword Gap Analysis Tool: Compare Two Keyword Lists
Paste your ranking keywords and a competitor's, get the gaps, the overlap and what is yours alone, with branded noise filtered out. Free, in your browser.
Interactive tool, runs in your browser
Free Keyword Research Tool: Volume, Difficulty, CPC
Enter a seed keyword and a country to get estimated search volume, keyword difficulty, cost per click and related keyword ideas. Free, no signup.
Interactive tool, runs on our server
Free LSI Keyword Generator (Really: Related Terms)
Enter a keyword and get the related terms and entities a thorough page on that topic would naturally cover. Honest about what LSI keywords are.
Interactive tool, runs on our server
Content tools
Briefs, snippets and drafts, measured before they publish.
Free Ad Copy Generator: Google, Meta, LinkedIn
Describe your product, pick Google, Meta or LinkedIn, and get ad copy variations written for that platform's format. Edit them before they go in the ad account.
Interactive tool, runs on our server
Free AI Article Generator: A Draft, Not an Article
Enter a topic and an optional keyword and get a short first draft to edit. A starting point, not a publishable article.
Interactive tool, runs on our server
Free Alt Text Generator for Images
Enter a public image URL and get suggested alt text describing the image, ready to edit so it fits the page it sits on.
Interactive tool, runs on our server
Free Article Rewriter: Change Tone, Keep Facts
Paste up to 1,500 words of your own writing, say how it should sound, and get a rewritten version. Then check every fact survived.
Interactive tool, runs on our server
Free Article Summarizer: Claim, Evidence, Caveat
Paste the text of an article and get a short summary. Then check it against the source, because summaries are where caveats go missing.
Interactive tool, runs on our server
Free Blog Outline Generator: H2 and H3 Headings
Enter a topic and an optional keyword and get an H2 and H3 heading outline for a blog post. Then shape it around what your reader is asking.
Interactive tool, runs on our server
Free Character Counter With Title and Meta Limits
Count characters with and without spaces, and see how much room is left for a title tag, meta description, X post or LinkedIn post.
Interactive tool, runs in your browser
Free Content Idea Generator
Enter a topic or niche and get a list of content ideas and angles to write about. Ideas to validate, not a content plan.
Interactive tool, runs on our server
Free CTA Generator: Call-to-Action Ideas
Describe your offer and who it is for and get call-to-action options to edit. Plus how to write a CTA that says what happens after the click.
Interactive tool, runs on our server
Free Email Subject Line Generator
Describe what your email is about and get a set of subject line options to choose from, edit and test with your own list.
Interactive tool, runs on our server
Free Grammar Checker: Grammar, Spelling, Punctuation
Paste up to 1,500 words and get grammar, spelling and punctuation issues flagged, each with a suggested correction you can accept or ignore.
Interactive tool, runs on our server
Free Headline Analyzer: Score Titles Before You Publish
Score a headline on SERP width, length, numbers, form, power words, shouting and keyword position. A transparent heuristic, not a CTR forecast.
Interactive tool, runs in your browser
Free Headline Generator for Blog Posts
Enter a topic and get headline options for a blog post or article. Pick one and make it specific to what your piece delivers.
Interactive tool, runs on our server
Free Meta Description Generator With SERP Preview
Meta descriptions that survive Google's rewriting: the length that displays, and five patterns that work.
Interactive tool, runs in your browser
Free Plagiarism Checker: Exact-Phrase Web Search
Paste text and the tool runs up to five of its most distinctive sentences as exact-phrase web searches, then shows which were found on other pages and where.
Interactive tool, runs on our server
Free SEO Content Brief Template and Generator
Fill in eleven fields and copy a Markdown content brief a writer will follow. Free, in your browser, with the reasoning behind each field.
Interactive tool, runs in your browser
Free SEO Title Generator: Title Tags That Fit
Describe a page and its target keyword and get title tag options to edit. Then check each one's pixel width before it goes live.
Interactive tool, runs on our server
Free Social Media Post Generator: X, LinkedIn, Instagram
Enter a topic or paste text from an article and get posts written for X, LinkedIn or Instagram, ready for you to edit into your own voice.
Interactive tool, runs on our server
Free Word Counter and Readability Checker
Words, sentences, reading time and a Flesch grade. Plus why word count is a symptom, not a target.
Interactive tool, runs in your browser
Reading Level Checker: Flesch Score and Grade Level
Flesch reading ease, Flesch-Kincaid grade and your longest sentences, longest first. Paste English text and see what to shorten.
Interactive tool, runs in your browser
Technical SEO tools
The files and markup a crawler reads before it reads your copy.
Free AI Crawler Simulator: See What GPTBot Sees
Fetch any URL as GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot and Googlebot. See each robots.txt verdict, status code and the text in the raw HTML.
Interactive tool, runs on our server
Free Canonical Tag Checker: Test Any URL
Enter a URL to see the canonical it declares, whether it points to itself or elsewhere, and whether the canonical target resolves.
Interactive tool, runs on our server
Free FAQ Schema Generator (JSON-LD, Article, Breadcrumb)
Generate valid Article, FAQPage and BreadcrumbList JSON-LD, and the one rule that keeps it from backfiring.
Interactive tool, runs in your browser
Free Internal Link Checker: Audit Anchors on Any Page
Paste a page's HTML and get every internal link with its anchor text, flagged for generic anchors, repeated targets, image links with no alt and links to itself.
Interactive tool, runs in your browser
Free Link Extractor: Every Link on a Page
Enter a URL and get every link in the page's raw HTML, with anchor text, split into internal and external, and any nofollow, sponsored or ugc attributes.
Interactive tool, runs on our server
Free robots.txt Generator With AI Crawler Rules
Build a robots.txt with AI crawler rules. Which bots train models, which answer questions, and why it matters.
Interactive tool, runs in your browser
Free robots.txt Tester: Is This URL Blocked?
Enter a URL and pick a crawler, from Googlebot to GPTBot and PerplexityBot. See the site's live robots.txt and whether that crawler may fetch the page.
Interactive tool, runs on our server
Free Slug Generator: Clean URL Slugs From Any Title
Clean URL slugs in bulk, with proper accent transliteration. Plus why renaming a ranking URL is the wrong call.
Interactive tool, runs in your browser
Free Website Metadata Checker: Title, OG, Schema
Enter a URL and see the page's title, meta description, canonical, robots tag, Open Graph and Twitter tags, JSON-LD types, h1 and language.
Interactive tool, runs on our server
Free XML Sitemap Checker and Validator
Enter a site or sitemap URL. The tool finds the sitemap, checks that it parses, counts its URLs and child sitemaps, and flags obvious problems in a sample.
Interactive tool, runs on our server
SEO Health Check: The Agency Audit Checklist
A repeatable SEO health check: crawl, indexation, structure and AI-readiness, in problem-finding order.
Written method with a copyable template
WordPress Permalink Generator: Preview Post URLs
Turn post titles into WordPress permalinks and preview the full URL under each structure: post name, date, month or category.
Interactive tool, runs in your browser
Analysis guides
How to read what the SERP is already telling you.
Free Backlink Checker: Links and Referring Domains
Enter a domain to see a backlink summary: how many links and referring domains a third-party index has found, and a sample of the pages that link to it.
Interactive tool, runs on our server
Free Google Rank Checker: Live Position for a Keyword
Enter a domain, a keyword and a country to see whether the domain appears in a live Google search result, at what position, and which URL ranks.
Interactive tool, runs on our server
Free Website Worth Calculator: Traffic Value Estimate
Estimate what a domain's organic search traffic would cost as ads each month: modelled traffic times keyword cost per click. Not a business valuation.
Interactive tool, runs on our server
SERP Analysis: How to Read a Search Result Page
Read a SERP before you brief a writer: intent from the result mix, and the keywords worth skipping.
Written method with a copyable template
Planning and budgeting
A checklist to work through, and calculators that do arithmetic on your numbers, not ours.
Interactive SEO Checklist: 33 Checks, Saved as You Go
33 SEO checks to tick off, grouped from crawl and index to AI crawler access. Saved in your browser, exportable as Markdown.
Interactive tool, runs in your browser
SEO Cost Calculator: Build a Budget From Your Own Numbers
Add up an SEO budget from your own inputs: people or retainer, content, technical hours, tools and outreach. No invented market rates.
Interactive tool, runs in your browser
SEO ROI Calculator: Return, Payback Month and Formula
Estimate SEO return from your own traffic, conversion and deal numbers: extra revenue, ROI and payback month, with the formula shown.
Interactive tool, runs in your browser
File and data utilities
The conversions that come up around SEO work: images to web size, exports to spreadsheets.
Free Image Resizer and Compressor for the Web
Resize and compress a JPEG, WebP or PNG in your browser, with before and after file sizes. The image is never uploaded.
Interactive tool, runs in your browser
Free JSON to CSV Converter, Nested Keys Flattened
Paste JSON and get a CSV with nested objects flattened to dot-named columns. Preview, copy or download. Runs in your browser.
Interactive tool, runs in your browser
Why nothing here asks for an email
A free tool that gates its result behind a form is a lead form with a longer introduction. Most tools on this page do their work in your browser, so there is no server cost to recover and no reason to ask who you are. The ones that need a server, to fetch a page, call a model or pull search data, show their result without asking either; they carry a daily limit instead, which is how they stay free.
The trade is straightforward. These solve the small, repeated problems. AltoRank is for when you want the whole loop run every week, across every site you look after, with a person approving each article before it publishes. The engine is open source if you would rather run it than buy it.
Common questions
Are these SEO tools really free?
Yes. No signup, no email gate and no watermark on the output. The 20 browser tools run on your machine; the text you paste into them is never sent to a server. The 26 server-run tools send what you enter to our server, which counts runs and never saves the input (an identical request may be answered from memory for a few minutes), and have a daily limit so they stay free. The two hosted checks, the AI-readiness check and the growth plan, fetch the domain you give them.
Why does a paid product give these away?
Because they are the small, repeatable checks, and the product is the recurring work around them: researching, drafting, checking and publishing articles for many sites at once, with a person approving each one. If a free tool solves your problem, take it. If you want the work done every week, that is AltoRank.
Can I use them for client work?
Yes, without attribution and without limit. Agencies run them on prospects as often as on clients.
Do the tools use live search data?
The browser tools do not. A server-run tool that uses search data says so on the tool, and has a daily limit because every call costs us money. The growth plan also fetches live SERP data for a domain.
Which of these are guides rather than tools?
2 of the 48 pages are written methods with a copyable template rather than an interactive widget. Each is labelled on this page, so you know before you click.