Meta Tag Analyzer & On-Page SEO Checker
Paste any public URL and this free Meta Tag Analyzer runs a full on-page SEO audit in seconds. It fetches the page, reads its meta tags, and grades your title, meta description, canonical, robots, Open Graph and Twitter cards, headings, charset and hreflang with clear pass, warn and fail verdicts. Built for marketers, SEOs and site owners — including Thai sites on legacy TIS-620 encoding.
Your report will appear here
Enter a URL and click Analyze to run a full on-page SEO check.
Passed
0
Warnings
0
Failed
0
SEO checklist
| Check | Verdict | Details |
|---|
All tags found
| Value |
|---|
The og:image is shown as a URL only — for privacy and security we do not load remote images.
How to use
- Paste the full URL of the page you want to check (https:// is added automatically).
- Click Analyze — the tool fetches the page and reads every meta tag.
- Review the checklist to see what passes, what needs work, and what is missing.
- Open the "All tags found" table for the exact values, then copy the report or export a CSV.
- Click "Preview this snippet in Google" to see how your title and description will look in search.
Features
- Full on-page audit: title, meta description, canonical, robots, viewport, charset and HTML lang
- Open Graph and twitter:card checks so shared links look their best
- Grapheme-accurate title and description length — measured correctly for Thai text
- Detects legacy TIS-620 / Windows-874 Thai encoding and reads it without garbling
- Follows redirects and reports the full chain, final URL, HTTP status and page size
- Copy a plain-text report or export every check to CSV for your audit spreadsheet
Frequently asked questions
What meta tags does this tool check?
It reads the title tag, meta description, canonical, meta robots, viewport, charset, HTML lang, favicon, H1 headings, Open Graph tags (og:title, og:description, og:image, og:url, og:type), twitter:card and hreflang links — plus HTTP status, redirects and page size.
What are the ideal title and description lengths?
Aim for roughly 50–60 characters for the title and 120–160 for the meta description. The tool flags anything too short or too long, and it counts characters the way a human sees them so Thai vowels and tone marks never inflate the total.
Does it work with Thai websites using old encodings?
Yes. If a page declares a legacy TIS-620 or Windows-874 charset, the tool converts it to UTF-8 before parsing, so Thai text is read correctly instead of showing as garbled characters. It also warns you to migrate to UTF-8.
Why can't I see the og:image preview?
For privacy and security we never load remote images. The og:image is shown as its URL so you can confirm it is set and points to the right file, without your browser fetching third-party content.
Can I check a page behind a login or a private network?
No. The tool only fetches public pages over http or https. Pages that require a login, or addresses on private and internal networks, cannot be analyzed.