On-Page SEO Checker

Analyzes on-page SEO and readability to guide content teams in improving titles, meta descriptions, headings, and keyword usage for higher search visibility.

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2,252+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how On-Page SEO Checker processes input data instantly inside your browser.

Sample Input Birth date: Jan 15, 1995, Target date: Oct 20, 2023

Computed Result Chronological Age: 28 Years, 9 Months, 5 Days (10,505 days elapsed)

Execution Mode Client-Side In-Browser JS

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About This Tool

This tool analyzes on-page SEO and readability for content creators, editors, and marketers drafting or auditing pages. It assesses title and meta description quality, slug length, heading structure, content depth, and keyword focus to compute scores and surface issues.

Core logic combines a weighted scoring model with standard readability metrics. It checks for keyword presence in the title and meta, validates slug length, verifies H1/H2 coverage, and estimates keyword density, returning a final SEO score and a readability score along with concrete recommendations.

Unique value includes batch-ready output for reporting, configurability for multiple focus keywords, and exportable summaries. It mirrors Yoast-like guidelines without crawling or live site data, enabling rapid drafting improvements for WordPress, static sites, and CMS content.

Save your calculation history with a free account

How to Use

Provide inputs: page_title, meta_description, slug, content, and focus_keywords.
Optionally add multiple focus keywords or synonyms.
Run analysis to obtain seo_score, readability_score, and issues.
Review recommendations and adjust content structure and metadata.
Re-run to verify improvements and compare results.

Frequently Asked Questions

Find Quick Answers

What does the SEO score indicate?

The SEO score summarizes how well the page aligns with on-page optimization best practices. It combines keyword usage, metadata quality, heading structure, and readability into a 0–100 score, guiding edits and prioritization.

Can I analyze multiple pages at once?

Batch analysis is supported in advanced deployments. For a single run, you input one page draft. Batch mode aggregates scores and issues across pages for reporting and trend analysis.

Does the tool consider readability metrics?

Yes. The tool uses standard readability metrics (e.g., FK) to estimate how easy the content is to read, alongside keyword-focused checks, providing a readability score out of 100.

Which languages and locales are supported?

The default analysis targets US English content. Locale-aware rules can be extended, but current metrics assume English-language text and common US practice.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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