UTILS.
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Web & SEO Tools

Free web and SEO tools to build and optimize your site — generate meta tags, Open Graph, robots.txt, sitemaps, JSON-LD and UTM links, preview search snippets, and check keyword density.

SEO tags and page markup

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Meta Tag Generator

Generate SEO meta tags for your page head, including title, description and robots.

 og

Open Graph Generator

Generate Open Graph and Twitter Card meta tags with a live social share preview.

 rel

Canonical Tag Generator

Generate a canonical link tag and og:url meta from a page URL.

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Meta Robots Tag Generator

Generate a robots meta tag to control how search engines crawl and index a page.

 hl

Hreflang Tag Generator

Generate hreflang alternate link tags from a list of language and URL pairs.

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JSON-LD Schema Generator

Generate schema.org JSON-LD structured data for articles, products and more.

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Google SERP Preview

Preview how your page appears in Google search results with length checks.

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Image srcset Generator

Generate a responsive <img> tag with srcset and sizes from a path and width list.

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Keyword Density Checker

Analyze keyword frequency and density for SEO, ignoring common stop words.

Site files and server setup

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robots.txt Generator

Build a valid robots.txt with allow, disallow, crawl-delay and sitemap rules.

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XML Sitemap Generator

Generate a valid XML sitemap from a list of URLs with optional changefreq and priority.

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llms.txt Generator

Build a spec-compliant llms.txt file: an H1 site name, a summary blockquote and titled sections of Markdown links, all in your browser.

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ads.txt / app-ads.txt Generator

Generate a valid ads.txt or app-ads.txt: validates each record, dedupes, and adds CONTACT and SUBDOMAIN directives. Runs in your browser.

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Web App Manifest Generator (PWA)

Generate a valid PWA web app manifest (manifest.json) with icons, theme colors and display mode, plus the ready-to-paste link rel=manifest tag.

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htaccess Redirect Generator

Generate Apache .htaccess redirect rules from a list of from and to pairs.

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CSP Header Builder

Build a Content-Security-Policy header by filling in common directives.

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DNS Record Generator

Build a DNS record in zone-file format from a record type, host, value and TTL.

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HTTP Header Parser

Parse raw HTTP headers into a readable name and value table.

Social posts, campaigns and email

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Social Media Image Sizes

Searchable reference of recommended image dimensions for major social platforms.

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Social Character Counter

Count characters against X/Twitter and other social platform limits live.

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Hashtag Generator

Turn keywords and phrases into ready-to-paste hashtags with case options.

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YouTube Thumbnail Grabber

Get thumbnail image URLs from any YouTube link or video ID.

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UTM Link Builder

Build campaign tracking URLs with encoded UTM parameters for analytics.

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Mailto Link Builder

Build a mailto: link with recipients, subject and body, properly URL-encoded.

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Email Signature Generator

Create a clean table-based HTML email signature with a live preview.

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Email Normalizer

Normalize email addresses, removing Gmail dots and +tags, then dedupe the list.

Device checks and Wi-Fi sharing

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WiFi QR Code

Generate a scannable QR code that lets phones join your WiFi network instantly.

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Microphone Test

Check that your mic works with a live level meter, waveform and record-and-playback test.

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Webcam Test

Preview your camera with resolution, frame-rate and device readouts, plus a mirror toggle and snapshot.

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