SEOcheck analyzes your article against 50+ proven SEO criteria as you write. Fix issues instantly, optimize your content, and rank higher in SERPs, all in one content writing tool with no distractions.
Your content never leaves your device. Nothing is sent to any server - analysis runs entirely in your browser.
Articles are saved in IndexedDB, your browser's built-in database. No cloud, no account, no risk of data loss from a third party.
The tool costs almost nothing to run, just hosting. There are no ads and there never will be. Clean interface, always.
No analytics scripts, no cookies, no fingerprinting. We have no idea you're here, and that's the point.
Open the page and start writing. No account, no email, no onboarding. Your history persists automatically between sessions.
50+ SEO checks update instantly as you type: keyword placement, readability, structure, meta, and more. No manual re-runs.
Every check runs directly in your browser as you type, with no server round-trips. Results update in milliseconds, no waiting, no manual refreshes.
Use the full-featured editor to write from scratch or paste existing content. Or scan a live URL to analyze an existing page.
Type in the sidebar each of your target keywords. The tool checks for over 50 SEO criteria in real time for each keyword.
The sidebar updates instantly with a score out of 100 across 50+ criteria, grouped by keyword, structure, content, and meta.
Each check tells you exactly what to fix. Expand any item for a plain-English explanation and sometimes an external link to learn more.
Every article is analyzed against these criteria in real time, with results grouped into four categories: Keyword, Structure, Content, and Meta. Each item shows a pass, warning, or fail status, and can be expanded to reveal details.
Quick answers about privacy, scoring, imports, and how to use this SEO tool effectively.
Yes, SEOcheck is a free SEO tool. It can be used with no signup, no ads, no backend, and no cloud processing. It does not cost anything to keep it running, as every process is handled locally in your browser.
No. Your article stays on your device. Analysis runs in your browser and history is stored locally in your browser database.
The score combines 50+ checks across keyword usage, structure, content quality, and metadata. Some checks are weighted more heavily based on their impact on SEO.
URL import may fail due to various reasons, such as the page being behind a login, having dynamic content that cannot be easily extracted, or restrictions set by the website's robots.txt file.
No, SEOcheck is a website on a server, so it requires an internet connection to load. But once loaded, all analysis is performed locally in your browser, so you can use it without an active internet connection after the initial load.
This SEO tool is mainly designed for English content. But you can analyze content in other languages, although the accuracy and relevance of the suggestions may vary. For example, some technical SEO checks like title length or subtitles presence work in any language, while others like transition words and readability are optimized for English.
Warning checks indicate potential issues that may affect SEO but are not critical, while error checks highlight significant problems that can have a major impact on your SEO performance.
Since everything is stored locally in your browser, you need to manually export and import your work with the built-in export/import feature to use it on multiple devices or share it with others.
Import history?
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