무료 온라인 SEO Tools

Generate meta tags, robots.txt, sitemaps, schema markup, and analyze your pages for SEO — all free, all in your browser.

21 개의 무료 도구 사용 가능
21+
무료 도구
100%
브라우저 기반
0
데이터 업로드
39
가이드
class="tools-grid" id="toolsGrid">
🏷️

Meta Tag Generator

Generate perfect meta title, description, and keyword tags for your pages.

🤖

Robots.txt Generator

Create a robots.txt file to control how search engines crawl your site.

🗺️

Sitemap Generator

Generate XML sitemaps from a list of URLs for search engine submission.

📱

Open Graph Checker

Preview how your page looks when shared on social media.

📊

Keyword Density Analyzer

Analyze keyword frequency and density in your content.

📑

Heading Structure Checker

Analyze heading hierarchy (H1-H6) from HTML for proper SEO structure.

↪️

Redirect Checker

Check URL redirect chains and final destination status codes.

🔧

Schema Markup Generator

Generate JSON-LD structured data for articles, products, FAQs, and more.

Page Size Analyzer

Estimate page weight and loading performance from HTML content.

🔗

Link Extractor

Extract all links from HTML and analyze anchor text distribution.

🔗

Link Extractor

Extract all links from a webpage. Analyze internal vs external links and anchor text.

📈

Page Size Analyzer

Analyze webpage size and resource breakdown. Measure page weight for performance.

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Schema Markup Generator

Generate Schema.org JSON-LD structured data for better SEO and rich snippets.

🔗

Broken Link Checker

Find broken links on any webpage.

📖

Content Readability

Analyze text readability with Flesch score.

📆

Domain Age Checker

Check when a domain was first registered.

🔍

Favicon Checker

Check if a website has proper favicon setup.

💡

Keyword Suggestion

Generate keyword ideas from a seed keyword.

📱

Mobile Friendly Check

Test if a page is mobile-friendly.

📊

Word Counter

Count words, characters, sentences, and paragraphs.

🎯 SEO Tip: Check your site's meta tags and structured data regularly

Why SeoIO?

🔒

100% プライベート

すべてのツールはブラウザで実行されます。データはサーバーにアップロードされません。

即座の結果

No waiting, no loading. Process data in milliseconds.

💰

永久無料

21 ツール、費用ゼロ。登録不要、制限なし。

📱

どこでも動作

デスクトップ、タブレット、スマートフォン。あらゆるモダンブラウザ、あらゆるデバイス。

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About SeoIO

SeoIO (seo-io.com) is a free online tool suite offering 19 SEO and digital marketing tools — meta tag generators, keyword analyzers, sitemap tools, and more. All tools run entirely in your browser — no data is uploaded to any server, ensuring complete privacy. No registration or signup required.