On-Page SEO Tools

Free online SEO tools — a Google SERP preview generator with real pixel-width truncation, computed entirely in your browser.

8 tools

Hreflang Generator

Build hreflang tags for every language version of a page as HTML, an HTTP header or sitemap XML, and catch invalid codes like en-UK before they ship.

SERP Preview

Preview how a title and description will look in Google search results, with real pixel-width truncation, not just a character count. 100% client-side.

Meta Tag Generator

Generate title, description, canonical, robots, Open Graph, and Twitter Card meta tags in one place. Copy the HTML and paste into your page head.

robots.txt Generator

Build a valid robots.txt file from Allow/Disallow rule groups, crawl-delay and sitemap URLs. Multiple user-agents supported. Copy and paste, entirely offline.

Keyword Permutations

Combine word lists into every long-tail keyword phrase, one term from each. Join character, list-order permutation and Google Ads match-type wrapping.

Also in On-Page SEO

Tools from other categories tagged with On-Page SEO

Subject Analyzer

Score an email subject line across 6 signals — length, urgency, personalisation, numbers, question format and spam risk — entirely in your browser.

Product Schema

Build a schema.org Product JSON-LD block with brand, SKU, price, availability and star ratings. Empty fields are dropped, so the markup stays valid.

Text Similarity

Compare two documents with cosine, Jaccard and character edit-distance scores, plus the words unique to each side and every phrase they share.

Why These Tools

Google SERP Preview Tool and Meta Tag Generator are the first two tools in an SEO category designed to remove the guesswork from on-page optimisation. The SERP preview measures title and description with the browser's own Canvas text renderer and shows exactly where Google's pixel budgets cut the text off — a character count cannot do that. The meta tag generator builds the complete set of HTML tags in one form: essential title, description, robots, and canonical, plus Open Graph and Twitter Card tags for social previews, with character counters coloured green when inside the optimal range. robots.txt generation, XML sitemap building, and hreflang tag generation are queued next.