SEO / Indexing

Meta tags, structured data and indexing checks.

The tools in the SEO / Indexing category help you check that search engines can correctly read, index, and surface your pages in search results (the SERP). They cover practical tasks such as measuring meta title and description length, previewing how a page looks in Google results, validating structured data (JSON-LD), setting up hreflang for multilingual sites, checking robots.txt and sitemap.xml, and cleaning up URL slugs. They're useful for bloggers, online store and business-site owners, marketers, and front-end developers — anyone who cares about ranking higher and avoiding pages being dropped from the index.

A reliable workflow is to move from indexing to presentation. First confirm that crawling isn't blocked: review robots.txt and meta robots tags, and make sure your sitemap is valid so pages can be indexed at all. Next, resolve duplicate and language signals with canonical tags and hreflang. Finally, tune your meta titles and descriptions so they don't get truncated, use a SERP preview to see the real-world snippet, and add structured data to improve your chances of rich results such as star ratings or FAQ snippets.

Meta Title Length Checker

Check title length and how it fits in search results.

Meta Description Length Checker

Check description length and search snippet fit.

SERP Snippet Preview

Preview how your title, URL and description appear in Google results.

Structured Data Generator

Generate Schema.org JSON-LD for Article, FAQ, Breadcrumb and more.

robots.txt Generator

Generate a robots.txt with allow/disallow rules and sitemap.

hreflang Tag Generator

Generate hreflang link tags for multilingual pages.

Open Graph Tag Generator

Generate Open Graph and Twitter card meta tags.

Open Graph Preview

Fetch a URL's OG/Twitter meta tags and preview the share card.

robots.txt Checker

Fetch a site's robots.txt and review its rules and sitemap declarations.

SEO Meta Tag Checker

Fetch and check a URL's title, description, canonical, OG and h1.

Sitemap Validator

Fetch sitemap.xml and validate format, URL count and index files.

Favicon Checker

Check a site's favicon, icons and web manifest declarations.

URL Slug Checker

Check a URL slug for length, special characters, uppercase and spaces, and suggest a clean slug.

Frequently asked questions

How long should my meta title and description be?

Aim for roughly 30–60 characters for the title (under about 600 pixels) and 120–158 characters for the description so they don't get cut off in search results. Keep in mind Google truncates based on pixel width, not character count, so these numbers are just guidelines — a SERP preview tool is the most accurate way to see how your snippet will actually display.

What's the difference between robots.txt and a meta robots noindex tag?

robots.txt controls whether crawlers may visit (crawl) a page, while a meta robots noindex tag controls whether the page may appear in the index. The catch: if you block a page in robots.txt, crawlers can't read the noindex tag at all — so to remove a page from the index, don't block it; use noindex instead.

Does adding structured data (JSON-LD) improve my rankings?

Structured data isn't a direct ranking factor, but it can earn rich results — star ratings, FAQs, prices — that significantly boost click-through rate. Syntax errors cause it to be ignored, so always run your markup through a validator to catch errors and warnings before publishing.

When do I need hreflang?

You need hreflang when you serve the same content in multiple languages or regions (for example Korean/English, ko-KR/en-US), to tell search engines which version to show each user. Declarations must be bidirectional — each language page should reference the others and include a self-reference — and they shouldn't conflict with your canonical tags.

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