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Build Open Graph and Twitter meta tags and preview how a link card will look.
Preview
Tags
og:title, og:description, og:image, and og:url are what Slack, iMessage, and Facebook read. Twitter uses twitter:card plus the same title and image. Fill the form, copy the tags into your layout, and keep the image at least 1200×630 so the card does not crop poorly.
UTM Campaign Builder
Add utm_source, utm_medium, utm_campaign, utm_term, and utm_content to a URL and copy a campaign link.
robots.txt and Sitemap Validator
Paste a robots.txt or sitemap XML file and check directives, URLs, and lastmod dates. Optionally fetch a public URL.
.htaccess to nginx Redirect Converter
Convert Apache Redirect, RedirectMatch, and common RewriteRule / RewriteCond lines into nginx rewrite or return directives.
From the blog
Why Slack and iMessage show the wrong title for your post
og:title, og:description, og:image, and og:url are what unfurls read. The HTML title tag is not enough.
From the blog
UTM parameters that do not split your reports into twelve campaigns
utm_source is the platform, utm_medium the channel, utm_campaign the name you will filter on.