SEO & Marketing
10 free seo & marketing. UTM builders, meta tags, SERP previews, and SEO audit helpers.
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UTM Builder (Campaign URL Generator)
Build Google Analytics UTM-tagged URLs. Compose source, medium, campaign, term, and content parameters with proper URL encoding.
HTML Meta Tag Generator (SEO, OG, Twitter)
Generate a complete set of HTML meta tags: title, description, canonical, Open Graph, Twitter Card, and robots. Copy the full <head> snippet.
Google SERP Snippet Preview
Preview how your page title and meta description will appear in Google search results. Live pixel-width check + truncation warnings.
Keyword Density Checker (1-word, 2-word, 3-word)
Analyze keyword frequency and density in your content. See top 1-, 2-, and 3-word phrases with counts and percentage of total words.
robots.txt Generator
Generate a valid robots.txt file. Configure per-bot rules, disallow paths, crawl delay, sitemap URL, and common presets.
Schema Markup Generator (JSON-LD for SEO)
Generate JSON-LD structured data for Article, FAQ, HowTo, Product, Recipe, and LocalBusiness. Valid against schema.org and Google's rich-results spec.
A/B Test Significance Calculator
Check if your A/B test result is statistically significant. Enter visitors and conversions for both variants; get p-value, confidence, and lift.
SMS Character Counter (GSM-7, UCS-2, Segments)
Count SMS characters and segments. Detects GSM-7 vs UCS-2 encoding, shows per-segment limits (160/153 vs 70/67), and flags emoji upgrades.
ROAS Calculator (Return on Ad Spend + Break-Even CPA)
Calculate ROAS, profit per customer, and break-even CPA from ad spend, revenue, and margin. Works for Google, Meta, and TikTok campaigns.
Hreflang Tags Generator (Multi-language SEO)
Generate hreflang link tags for international SEO. Supports language codes, region codes, and x-default. Outputs HTML, HTTP header, and sitemap formats.