Why We Built 12 Free SEO Tools
Every SEO engagement we run at Dynamically follows a process. We calculate potential revenue uplift before recommending a budget. We generate structured data as part of every technical audit. We build redirect maps for every migration. We check robots.txt files, audit canonical tags, and assess faceted navigation risk.
Over time, we realised that the internal spreadsheets, scripts, and templates we relied on could be useful to a much wider audience – marketing managers, in-house SEO teams, developers, founders, and freelancers who need quick, reliable outputs without paying for enterprise software or wrestling with command-line tools.
So we built them into standalone, browser-based tools and made them available for free. No signup, no paywall, no data collection. Just practical utilities that solve specific problems.
This post introduces all 12 tools, explains what each one does, who it is for, and when you might reach for it. You can browse the full collection on our SEO tools page, or jump directly to any tool that catches your eye below.
Calculators: Quantify the Impact
The first group of tools helps you put numbers behind your SEO decisions. Whether you are building a business case for investment, forecasting results, or reporting to stakeholders, these calculators turn assumptions into structured estimates.
Revenue Uplift Calculator
The Revenue Uplift Calculator estimates how much additional revenue you could generate by improving your search rankings for specific keywords. You input your current positions, target positions, search volumes, and conversion metrics – and the tool models the traffic gain based on established click-through rate curves, then converts that into projected revenue.
This is the tool we use most frequently with our own clients. It forms the backbone of every SEO proposal and quarterly review. If you have ever needed to answer the question "What is SEO actually worth to us?", this is where you start.
Best for: Marketing managers building business cases, agencies pitching SEO retainers, in-house teams forecasting quarterly targets.
Page Speed Impact Calculator
Site speed affects everything – bounce rates, conversion rates, crawl efficiency, and Core Web Vitals scores. The Page Speed Impact Calculator helps you quantify the financial impact of speed improvements. Input your current load time, target load time, monthly traffic, and conversion value, and it estimates the revenue impact of closing that gap.
The research behind this is well-documented. Google has published data showing that as page load time increases from one second to three seconds, the probability of a bounce increases by 32%. For ecommerce sites, every second of delay can reduce conversions by up to 7%. This calculator helps you turn those general findings into a figure that is specific to your business.
Best for: Developers prioritising performance work, ecommerce managers justifying CDN or infrastructure investment, SEO teams including speed in their audits.
Migration Risk Scorecard
Site migrations – whether platform changes, domain moves, redesigns, or URL restructures – are among the highest-risk events in SEO. Get them wrong and you can lose months or years of organic visibility overnight. The Migration Risk Scorecard walks you through a structured assessment of migration risk factors and generates a score that helps you understand where your vulnerabilities lie.
We built this tool because we have seen too many businesses underestimate migration complexity. A scored checklist forces you to confront the risks before they become problems – redirect coverage, content parity, internal linking, technical infrastructure, and more.
Best for: Businesses planning a platform migration, development teams scoping a redesign, SEO consultants advising on migration strategy.
Generators: Build What You Need
The second group of tools generates code, markup, or configuration files that you can copy and paste directly into your site. Each one eliminates a manual process that is either tedious, error-prone, or both.
Redirect Rule Generator
Writing redirect rules by hand is slow and mistake-prone – especially when you are dealing with hundreds or thousands of URLs during a migration. The Redirect Rule Generator lets you input old and new URL pairs, select your server environment, and generate properly formatted redirect rules ready for implementation.
The tool supports common server configurations and handles the syntax so you do not have to. Paste in your mapping, choose your format, and export clean redirect rules that your development team can deploy with confidence.
Best for: SEO teams managing migrations, developers implementing redirect maps, anyone who has ever spent an afternoon debugging a misformatted rewrite rule.
Robots.txt Builder
Your robots.txt file is a deceptively simple document with outsized consequences. Block the wrong path and you can deindex entire sections of your site. Allow too much and you waste crawl budget on low-value pages. The Robots.txt Builder provides a visual interface for constructing robots.txt rules, so you can build your file without memorising the syntax or second-guessing your directives.
It is particularly useful when managing multiple user agents – something that has become increasingly important as AI crawlers like GPTBot, ClaudeBot, and PerplexityBot have entered the landscape. Pair it with our AI Bot Manager for a comprehensive crawler management strategy.
Best for: Technical SEOs, developers configuring crawler access, anyone updating their robots.txt for the first time.
Structured Data Generator
Structured data is one of the most impactful technical SEO implementations you can make, yet it remains underused because writing JSON-LD by hand is fiddly. The Structured Data Generator lets you select a schema type, fill in the relevant fields, and generate valid JSON-LD markup that you can paste directly into your page templates.
The tool supports the most commonly used schema types – Organisation, LocalBusiness, Article, Product, FAQ, HowTo, BreadcrumbList, and more. Each template includes the recommended and required properties based on Google's documentation, so you do not have to cross-reference the schema.org specification yourself.
Best for: SEOs adding schema markup to client sites, developers implementing structured data, content teams who want rich results without touching code.
Canonical URL Generator
Duplicate content issues caused by URL parameters, trailing slashes, protocol variations, and pagination are among the most common technical SEO problems. The Canonical URL Generator helps you define and generate the correct canonical tags for your pages, resolving ambiguity and consolidating link equity where it belongs.
It handles the edge cases that trip people up: should you include or exclude trailing slashes? What about www vs non-www? How do you canonicalise paginated content? The tool guides you through these decisions and outputs the tags you need.
Best for: SEOs resolving duplicate content issues, developers implementing canonical tags at scale, ecommerce sites with parameter-heavy URLs.
AI Bot Manager
AI crawlers are now among the most active bots on the web. Cloudflare reports over 50 billion AI crawler requests per day, and GPTBot traffic alone has increased by 305% year-on-year. The AI Bot Manager helps you make informed decisions about which AI crawlers to allow, which to block, and how to configure your robots.txt and meta tags accordingly.
The tool distinguishes between training crawlers (which collect data to train AI models) and search crawlers (which retrieve content to answer live queries). This distinction matters enormously for your Generative Engine Optimisation strategy – blocking the wrong crawler can make your brand invisible in AI-powered search results.
Best for: Any website owner who wants control over AI crawler access, SEOs working on GEO strategy, publishers managing intellectual property concerns.
UTM Builder
Consistent UTM tagging is the foundation of reliable campaign tracking, yet it is one of the first things to fall apart when multiple team members are creating links independently. The UTM Builder generates properly formatted UTM-tagged URLs with consistent naming conventions, so your Google Analytics data remains clean and actionable.
Enter your base URL, campaign source, medium, name, and optional term and content parameters, and the tool outputs a tagged URL ready to use. Simple, but it eliminates the inconsistencies that make campaign reporting unreliable.
Best for: Marketing teams running multi-channel campaigns, PPC managers tracking ad performance, anyone who has ever found "facebook", "Facebook", and "fb" as three separate sources in their analytics.
Content and Ecommerce Tools
These tools address the content layer of SEO – the meta tags, titles, and descriptions that directly influence click-through rates and relevance signals.
Ecommerce Meta Optimiser
Ecommerce sites often have thousands of product and category pages, each needing unique, optimised meta titles and descriptions. Writing them manually is impractical. The Ecommerce Meta Optimiser helps you generate well-structured meta tags for product and category pages using templates and variables – brand name, product name, category, key attributes – so you can produce optimised metadata at scale.
The tool enforces character limits, previews how your tags will appear in search results, and follows best practices for ecommerce meta tag structure. It is particularly useful during site launches or catalogue expansions when hundreds of pages need metadata simultaneously.
Best for: Ecommerce SEOs, catalogue managers, Shopify and WooCommerce store owners scaling their product range.
Auditing Tools: Find Problems Before They Find You
The final group of tools helps you identify technical issues that are easy to miss but can have a significant impact on your SEO performance.
Template Consistency Checker
On large sites, template inconsistencies creep in over time. A heading hierarchy that works on the blog template might be broken on the product template. A canonical tag that is correctly implemented on category pages might be missing from filtered views. The Template Consistency Checker analyses your pages and identifies inconsistencies in key on-page elements across different page templates.
This is the kind of issue that manual audits frequently miss because each individual page looks fine – the problems only become apparent when you compare templates against each other. The tool surfaces these discrepancies so you can fix them before they affect your rankings.
Best for: Technical SEOs auditing large sites, development teams maintaining template quality, agencies onboarding new clients.
Faceted Nav Risk Checker
Faceted navigation is essential for ecommerce usability – filters for size, colour, price, brand, and other attributes help users find what they need. But from an SEO perspective, faceted navigation can be catastrophic. Unchecked, it generates thousands or millions of indexable URL combinations, dilutes crawl budget, and creates massive duplicate content issues.
The Faceted Nav Risk Checker analyses your faceted navigation setup and flags potential risks – crawlable filter combinations, indexable parameter URLs, missing canonicals, and uncontrolled URL proliferation. It helps you understand the scale of the problem and prioritise the fixes.
Best for: Ecommerce SEOs, technical SEOs working on large catalogue sites, developers implementing filter functionality.
How We Use These Tools in Our Own Work
These are not theoretical exercises. Every tool in this collection mirrors a process we follow in our client engagements. When we take on a new SEO client, the Revenue Uplift Calculator informs our initial strategy and forecasting. When we plan a migration, the Migration Risk Scorecard structures our risk assessment. When we optimise a client's technical SEO, we use the Structured Data Generator, Canonical URL Generator, and Robots.txt Builder as part of our standard workflow.
Making these tools publicly available does not replace the strategic thinking, experience, and ongoing optimisation that a dedicated SEO partner provides. But they do give you a starting point – and they demonstrate the kind of structured, data-driven approach we bring to every engagement.
Built for Practitioners, Not for Show
We deliberately kept these tools focused and functional. There are no unnecessary features, no gated content, and no pressure to convert. If a tool solves your problem in two minutes and you never come back, that is a perfectly good outcome. If it makes you curious about what a more comprehensive approach could achieve, we are here for that conversation too.
All 12 tools are available now at dynamically.co.uk/tools. Bookmark the page, share individual tools with your team, and use them however they are most useful to you.
Want to go further? If you are looking for a strategic SEO partner who uses these same frameworks – and many more – as part of a comprehensive, results-driven programme, we would love to hear from you. Get in touch to start the conversation.