← Blogby Marcell Almeida

How to check meta tags by pasting HTML

Audit title length, meta description, canonical, Open Graph, and Twitter Card tags — paste page source, no URL fetch required.

Before you ship a page, you want to know if the title is too long, the description is missing, or the canonical URL points somewhere wrong. The Meta Tag Checker parses pasted HTML and flags pass, warning, and error states for each tag — entirely in your browser.

Paste-only limitation: this tool cannot fetch a live URL. Browsers block cross-site HTML requests (CORS). Copy your page source from View Source (Ctrl+U / Cmd+Option+U), your CMS export, or a saved file.

Try it — paste HTML and review the audit

Open full tool →

How it works

  1. Get your HTML — open the page in a browser, press View Source, and copy the markup. The head section is enough; full documents work too.
  2. Paste into the tool — analysis runs on every keystroke. No submit button, no upload.
  3. Fix flagged issues — errors (missing title), warnings (description too short), and passes are listed with a score summary at the top.

What gets checked

  • Title — presence and character count (Google typically truncates around 60 characters).
  • Meta description — presence and length (aim for 120–160 characters).
  • Canonical — whether a rel="canonical" link is set.
  • Open Graph — og:title, og:description, og:image, and og:url.
  • Twitter Card — twitter:card, twitter:title, and related tags.

Checker vs generator

The Meta Tag Generator builds tags from scratch when you are starting a new page. The checker audits HTML you already have. Use both: generate, paste into your template, then re-paste the rendered HTML here to verify.

Related audit tools

Preview how links look when shared with the Open Graph Preview, or validate structured data with the Schema Markup Validator.

The Meta Tag Checker is free, paste-only, and never sends your HTML to a server. More tools at maratool.com.