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SEO & Website
Robots, sitemaps, schema and on-page checks - 22 working tools
Robots.txt Generator
Build a robots.txt with allow/disallow rules and sitemap links.
Sitemap.xml Generator
Turn a list of URLs into a valid sitemap.xml.
UTM Link Builder
Add campaign tracking parameters to a URL.
Schema.org JSON-LD Generator
Create FAQ, Article, Organization or Product structured data.
Keyword Density Checker
Count how often words and phrases appear in your page text.
Heading Outline Checker
Paste HTML and check h1-h6 structure and missing alt text.
301 Redirect Generator (.htaccess)
Generate Apache redirect rules from old and new paths.
SEO Meta Analyzer
Paste page source to check title, description, canonical, robots, viewport, Open Graph and more. A checklist, not a score.
SERP Preview (Desktop & Mobile)
Type a title, URL and description to see a Google-style result with pixel-width truncation on desktop and mobile.
Open Graph Preview
See how a page looks when shared on Facebook, LinkedIn and chat apps, and check the required og: tags. Paste source or type the values.
X (Twitter) Card Preview
Preview summary and large-image cards for X and check twitter: tags against the documented limits.
Canonical Tag Checker
Check rel=canonical in pasted HTML and headers: count, absolute URL, match with the page URL, conflicts with noindex and hreflang.
Robots.txt Tester
Test whether URLs are allowed or blocked for a crawler using RFC 9309 matching (longest match, * and $ wildcards).
Sitemap XML Validator
Validate a sitemap.xml or sitemap index: structure, URL format, limits, dates, priority, duplicates. Opens .xml and .xml.gz.
Structured Data Validator
Check JSON-LD and microdata for syntax errors and missing properties for common types. Not Google's Rich Results Test.
YouTube Title Generator
Template-based YouTube title ideas from your topic and keyword, with a length check. Not AI: it fills proven title patterns.
YouTube Tags Generator
Turn your keywords into tag variants and keep them inside YouTube's 500-character tag limit.
YouTube Description Builder
Assemble a YouTube description from intro, chapters, links and hashtags, with a live 5,000-character counter.
Hashtag Generator
Extract hashtags from your caption or script (keyword frequency, no AI) and check count limits for Instagram, YouTube, TikTok, X and more.
YouTube Thumbnail Preview
Upload a thumbnail and see it at home-feed, sidebar and mobile card sizes with your title and duration badge, plus size and ratio checks.
Video Chapter Builder
Check YouTube chapter timestamps (start at 00:00, 3+ chapters, 10 s minimum each) and get a clean, correctly formatted list.
SRT Subtitle Editor
Open an .srt or .vtt file, edit text and timing, shift, merge, split, check overlaps and export as .srt or .vtt.