The LK Forge Meta Tag Generator writes the <head> block for a page: SEO title and description, a canonical link, the Open Graph properties and a Twitter Card — summary_large_image when you supply an image, summary when you do not. Create your SEO title and description plus Open Graph and Twitter Card tags — the code updates live as you type, with copy and download. Everything runs in your browser.
Fill in your page's title and description — these drive both search results and link previews — then add your canonical URL and a preview image (about 1200×630 works best). The generator assembles the SEO tags, the Open Graph tags used by Facebook, LinkedIn, Slack and iMessage, and the Twitter Card tags, updating the code as you type. Copy the block and paste it into the <head> of your page. It warns you if the title or description runs longer than search engines typically show.
Only fields you fill in are included, so you can generate a minimal set or the full lot. Building a robots file too? Use the robots.txt generator. To see how the finished title and description look in Google, check the SERP snippet preview.