Web & SEO tools
Robots.txt, meta descriptions, hreflang tags, UTM links, and other site plumbing.
Generate hreflang link tags from locale and URL pairs, with locale-format validation, duplicate detection, and x-default support.
Turn a brand, topic, benefit, and call to action into several meta description variants, each with a live character count.
Enter any page URL to preview its social share card and get a pass/warn/fail checklist of Open Graph and Twitter Card tags.
Build a robots.txt from user-agent groups, allow and disallow paths, crawl-delay, and sitemap URLs, with a preset for blocking AI crawlers.
Add utm_source, medium, campaign, term, and content to any URL, correctly encoded and preserving existing query parameters.
About Web & SEO tools
Four generators for the plumbing that sits behind a site's search presence. The robots.txt generator builds a valid file from user-agent groups, allow and disallow rules, and sitemap URLs — including a one-click preset for blocking AI crawlers. The hreflang generator turns locale and URL pairs into correct link tags, validating locale formats, catching duplicates, and handling x-default, which is exactly where hand-written hreflang usually goes wrong.
The meta description generator drafts several variants from a brand, topic, benefit, and call to action, each with a live character count against the length search engines actually display. The UTM link builder appends utm_source, medium, campaign, term, and content to any URL with proper encoding, preserving whatever query parameters the URL already had — so campaign links stay consistent and analytics stay clean.
They're aimed at site owners, marketers, and developers who deal with these files occasionally rather than daily — the syntax is easy to forget and unforgiving to get wrong. Everything is generated locally in your browser and free to use.