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Free Marketing & SEO Tools

Every number a marketer argues about in a meeting, worked out in seconds — paid media economics, SEO diagnostics, and the generators that save an afternoon of fiddling.

  • 104 free tools
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  • Runs in your browser

Most visited in Business, Marketing & SEO

Keyword Density Checker Instantly check keyword density and catch keyword stuffing before you publish. Domain Authority Checker Estimate your site's authority signals from links, age, spam score, and brand search. Image Alt Text Generator Build clear, keyword-smart, accessibility-friendly alt text for any image.

Ordered by how often these pages are shown in Google Search results. Every tool in the category is listed in full below.

A 10 tools

A/B Test Calculator Check if your split test winner is statistically significant with a real z-test. Ad Budget & ROAS Calculator Forecast clicks, conversions, revenue and ROAS from any ad budget — free tool. Ad Frequency Calculator Turn impressions and reach into average frequency, weekly frequency and fatigue risk. AdSense Revenue Calculator Estimate monthly and annual AdSense revenue by niche, geography, and traffic. Anchor Text Generator Generate a balanced mix of branded, exact-match, partial-match, and natural anchor text. Anchor Text Ratio Calculator Break a backlink profile into anchor types and flag distributions that look engineered. ARR Calculator Convert MRR to ARR and project your growth trajectory with churn, plus months to a target ARR. Attribution Model Comparison Calculator See how four attribution models credit the same conversions to different channels. Audience Reach Calculator Stack targeting filters against a market to find your reachable audience size. Average Star Rating Calculator Calculate your average star rating from review counts and see how many 5-star reviews reach your target.

B 5 tools

Backlink Value Calculator Estimate the referral and authority value of a single backlink in your own currency. Blog Title Generator Turn any topic into 15-25 click-worthy blog titles using proven headline formulas. Bounce Rate Calculator Calculate email bounce rate (hard/soft) or website bounce rate — pick your mode. Brand Search Share Calculator Split search demand into branded and non-branded and size your share of brand search. Business Name Generator Generate dozens of business name ideas from your keywords in Modern, Classic, Playful, or Premium styles.

C 16 tools

Churn Rate Calculator Calculate monthly customer churn, revenue churn, customer lifetime, and net revenue retention. Content Decay Calculator Measure how fast a page is losing traffic and whether a refresh is worth the time. Content Gap Calculator Compare your topics against competitors and rank the gap by volume and difficulty. Content Marketing ROI Calculator Model how your content library compounds traffic and revenue over its full lifespan. Conversion Rate Calculator Calculate your conversion rate, revenue and value per visitor — free and instant. Core Web Vitals Score Calculator Grade LCP, INP, and CLS against Google's thresholds and get one weighted score. Cost Per Lead Calculator Calculate cost per lead and see the true cost per customer once conversion rate is factored in. CPA Calculator Calculate campaign-level cost per acquisition from ad spend and conversions, and check it against target CPA. CPC Calculator Calculate cost per click directly, or the effective CPC hiding inside a CPM campaign. CPM Calculator Calculate CPM, impressions bought for a budget, and estimated reach for awareness campaigns. Crawl Budget Calculator See how long a full crawl of your site takes and how much of it is wasted. CTR Calculator Calculate click-through rate, compare to benchmark, and see the extra clicks a better CTR is worth. CTR Improvement Calculator See how many extra clicks and revenue a better click-through rate produces on your existing impressions. Customer Acquisition Cost Calculator Calculate your true, fully-loaded CAC including salaries, tools, and agency fees — not just ad spend. Customer Effort Score Calculator Turn seven-point customer effort survey responses into a mean CES with top and bottom two-box shares. Customer Lifetime Value Calculator Free CLV calculator: find a customer's lifetime profit, revenue and annual value instantly.

D 1 tool

Domain Authority Checker Estimate your site's authority signals from links, age, spam score, and brand search.

E 6 tools

Email List Growth Calculator Project your email list's real growth after subtracting unsubscribes and bounces. Email Marketing ROI Calculator Calculate email campaign revenue, profit and ROI instantly — free marketing tool. Email Open Rate Calculator Calculate your email open rate and compare it against real industry benchmarks in seconds. Email Signature Generator Build a professional HTML email signature for Gmail or Outlook in seconds — free, no software needed. Email Subject Line Tester Score your subject line for length, spam words, emoji, and mobile truncation instantly. Engagement Rate Calculator See your true engagement rate by followers, reach, and impressions side by side.

F 2 tools

Facebook Ads Character Counter See live where your Meta primary text, headline, and description get cut off. FAQ Schema Generator Turn your questions and answers into valid FAQPage JSON-LD structured data.

G 4 tools

GMB Optimization Score Calculator Audit your Google Business Profile field by field and get a completeness score. Google Ads Character Counter Live character counter for Google Ads headlines, descriptions, business name, and display paths. Google Cache Checker Generate one-click links to check if a page is indexed now that Google's cache: operator is gone. GRP Calculator Compute GRP, TRP, impressions, cost per rating point and CPM from reach and frequency you enter.

H 3 tools

Hashtag Generator Generate a mixed, platform-sized hashtag set for Instagram, TikTok, LinkedIn, X, or YouTube. Headline Analyzer Score any headline on length, power words, emotion, and structure before you publish. Htaccess Redirect Generator Generate safe .htaccess redirect rules for 301s, 302s, HTTPS, www, domains, and bulk migrations.

I 6 tools

Image Alt Text Generator Build clear, keyword-smart, accessibility-friendly alt text for any image. Impression Share Calculator Calculate impression share and split the lost share between rank and budget. Incrementality Test Calculator Compare a test group with a holdout to find incremental conversions and true CPA. Influencer Rate Calculator Estimate a fair influencer rate by followers, engagement, content type, and usage rights. Instagram Engagement Calculator Calculate your Instagram engagement rate by followers and reach, benchmarked by follower tier. Internal Link Opportunity Calculator Work out how many internal links your site is missing and which pages need them most.

K 5 tools

Keyword Cannibalization Checker Find keywords targeted by more than one page and score how serious each conflict is. Keyword Cluster Generator Paste a keyword list and get topic clusters with a suggested pillar page for each. Keyword Density Checker Instantly check keyword density and catch keyword stuffing before you publish. Keyword Difficulty Checker Estimate how hard a keyword is to rank for using the SERP signals you observe. Keyword Intent Classifier Sort keywords into informational, commercial, transactional and navigational intent.

L 6 tools

Landing Page Conversion Calculator Model the extra monthly and yearly revenue from improving your landing page conversion rate. Lead Conversion Calculator Break your funnel into stages and find the weakest link from visitor to closed customer. Link Velocity Calculator Measure how fast your referring domains grow and compare the pace to a competitor. Local SEO Ranking Calculator Score your map-pack visibility across relevance, distance and prominence with your weights. LSI Keyword Generator Generate related questions, modifiers and long-tail variants from any seed keyword. LTV:CAC Ratio Calculator Calculate your LTV:CAC ratio and get an instant verdict on whether your growth engine is healthy.

M 8 tools

Marketing Budget Calculator Turn a percent-of-revenue rule into a full channel-by-channel marketing budget. Marketing Quiz Take the 1-minute marketing quiz and find your marketing personality type. Marketing ROI Calculator Free marketing ROI calculator: get ROI %, net profit, ROAS and cost per customer fast. Media Mix Allocation Calculator Reallocate a fixed budget across four channels using each channel's cost per acquisition. Meta Description Length Checker Check meta description length by real pixel width, not just characters, with a live Google SERP preview. Meta Tag Generator Generate clean SEO, Open Graph and Twitter Card meta tags to paste into your page head. Minimum Detectable Effect Calculator Find the smallest lift your sample size can detect before you run the test. MRR Calculator Build your MRR waterfall: new, expansion, reactivation, contraction, churn, growth rate & quick ratio.

N 1 tool

NPS Calculator Calculate your Net Promoter Score from promoter, passive, and detractor counts.

O 1 tool

Optimal Price Calculator Fit a demand curve to two price and quantity observations and find the price that maximises profit.

P 1 tool

PPC ROI Calculator Calculate real PPC return after ad spend, margin, and management fees.

Q 1 tool

Quality Score Calculator Estimate your Google Ads Quality Score and see the cost per click it implies.

R 3 tools

Readability Checker Score your text's Flesch reading ease and grade level instantly. ROAS Calculator Calculate gross ROAS, profit ROAS, and the break-even ROAS your margin actually requires. Robots.txt Generator Build a valid robots.txt with WordPress/ecommerce presets and AI crawler blocking, then copy it instantly.

S 13 tools

SaaS Metrics Calculator Get ARPA, ARR, churn, LTV, CAC, LTV:CAC, payback & gross margin in one health dashboard. Sample Size Calculator Find out how many visitors per variant your A/B test needs before you launch it. Schema Markup Generator Generate valid JSON-LD schema markup for LocalBusiness, Article, Product, and more. SEO Audit Score Calculator Turn six pillar scores into one weighted SEO audit score with every weight editable. SEO Content Length Checker Live word count checker that compares your draft against ranking benchmarks by content type. SEO ROI Calculator Model SEO's delayed, compounding return and find your true break-even month. SEO Traffic Forecast Calculator Forecast sessions, conversions, and value from a change in ranking position. SERP Feature Opportunity Calculator Model how much click-through rate the features above the organic results absorb. SERP Snippet Preview Preview how your title and meta description appear in Google, with pixel-accurate width. SERP Volatility Calculator Turn a before-and-after ranking list into a volatility score for your own keywords. Share of Voice Calculator Measure your share of category impressions and spend, and price a higher share. Site Migration Risk Calculator Score a planned migration on URL change, redirects, templates, platform and timing. Social Media Engagement Calculator Compare engagement rates across Instagram, Facebook, LinkedIn and X to find your best platform.

T 5 tools

TikTok Money Calculator Estimate monthly TikTok earnings from Creator Rewards Program payouts and brand deals. Title Tag Length Checker Check title tag length by real pixel width against Google's ~600px limit, with a live SERP preview. Topical Authority Calculator Score your coverage of a topic against a competitor and size the gap in subtopics. Traffic Value Calculator See what your organic traffic would cost to buy on Google Ads — the number that justifies your SEO budget. Twitter Card Generator Generate twitter:card meta tags for summary, large image, player, and app cards.

U 2 tools

UTM Builder Build trackable UTM campaign URLs for Google Analytics in seconds — free & private. UTM Grader Paste a UTM link and get an instant grade for missing parameters, case mismatches, and encoding issues.

V 1 tool

Video Completion Rate Calculator Turn quartile view counts into completion rate, drop-off points and cost per view.

W 2 tools

Webinar ROI Calculator Calculate real webinar ROI from registrations through show-up rate to closed customers. Website Word Count Count words from plain text or raw HTML, with reading and speaking time estimates.

X 1 tool

XML Sitemap Generator Paste URLs and instantly generate a valid, standards-compliant XML sitemap ready to upload and submit.

Y 1 tool

YouTube Money Calculator Estimate monthly and annual YouTube ad revenue by niche, RPM and audience location.

No business, marketing & seo tool matches that. Search all 170 free tools.

What is in this set

The paid-media calculators answer the questions a dashboard will not: what your break-even ROAS actually is at your margin, what a click is worth before you bid on it, and whether a lift you measured is real or noise. The SEO tools go the other way — they take a page or a profile you already have and tell you what is wrong with it, from keyword cannibalisation to anchor-text distribution to crawl budget waste.

Why the numbers here differ from your ad platform

Ad platforms report ROAS from raw revenue and raw spend because they cannot see your cost of goods. A 4x return looks excellent until you subtract a 75% product cost, at which point it is exactly break-even. Several of these tools ask for margin precisely so the answer reflects your business rather than the platform's view of it.

Where the modelled numbers are flagged

Google publishes no formula for Quality Score, no composite for Core Web Vitals, and no target anchor-text ratio. Where a tool here scores something Google does not publish, the weighting is an Arb Digital model, it is stated on the page, and the inputs are editable so you can substitute your own assumptions.

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All 170 free tools are organised into 4 categories.