Capyseo Logo Capyseo
Open Source & Free Forever

AI-Powered SEO
Made Simple

Capyseo analyzes your website with 50+ SEO rules and provides AI-powered suggestions to improve your search engine rankings. Built for developers.

Capyseo mascot - a friendly capybara

Capyseo

Open Source

Choose Your Package

Capyseo is split into focused packages so you can use exactly what you need. Most developers start with the CLI for quick wins.

CLI

The command-line tool. Install it globally and analyze any website or folder with a single command.

Best for quick analysis, CI/CD pipelines, and one-off checks.

npm install -g @capyseo/cli

Core

The analysis engine. Import it into your own tools, scripts, or custom integrations.

Best for building custom tools or integrating SEO checks into existing systems.

npm install @capyseo/core

SvelteKit

Deep integration for SvelteKit projects. Get real-time SEO feedback during development.

Best for SvelteKit developers who want seamless integration.

npm install @capyseo/sveltekit

Not sure which to pick? Start with the CLI — it's the quickest way to see Capyseo in action.

npx @capyseo/cli analyze ./your-site

50+ SEO Rules Built-in

Comprehensive analysis covering every aspect of modern SEO best practices.

Meta Tag Analysis

Check title, description, viewport, charset, and language tags for SEO compliance.

Image Optimization

Validate alt text, lazy loading, dimensions, and modern format usage (WebP/AVIF).

Heading Structure

Analyze H1 presence, hierarchy, empty headings, and keyword optimization.

Technical SEO

Verify canonical URLs, robots meta, hreflang, favicons, and structured data.

Social Integration

Audit Open Graph tags, Twitter Cards, and social media preview optimization.

Structured Data

Validate JSON-LD, Schema.org types, breadcrumbs, and rich snippets.

Link Analysis

Detect broken links, redirect chains, and external link attributes.

Content Quality

Evaluate word count, keyword density, readability, and content structure.

Mobile Friendly

Check viewport settings, touch targets, and mobile font sizes.

Security Headers

Verify HTTPS, security headers, and script integrity attributes.

Performance Hints

Identify performance issues affecting Core Web Vitals scores.

AI Suggestions

Get intelligent recommendations powered by Google Gemini AI.

Get Started in Seconds

Install Capyseo and start analyzing your website's SEO health immediately.

Install
$ bun add -D @capyseo/cli
bun add v1.1.0
installed @capyseo/cli@1.0.0
3 packages installed [1.2s]
# or use npm/pnpm
$ npm install -D @capyseo/cli

How It Works

Four simple steps to better SEO.

1

Install

Add Capyseo to your project with a single command. Works with any framework.

2

Analyze

Run the analyzer on your site or directory. Get detailed reports with scores.

3

Autofix

Apply automatic fixes with --fix or AI-powered fixes with --ai-fix.

4

Ship

Deploy with confidence. Integrate with CI/CD for continuous SEO monitoring.

New Feature

Intelligent Autofixes

Don't just find issues — fix them automatically. Capyseo's agentic AI system analyzes your page content and generates context-aware fixes for meta tags, Open Graph data, Twitter Cards, and more.

  • Automatic meta tag generation
  • Context-aware title and description fixes
  • Open Graph and Twitter Card optimization
  • Cost estimation before AI operations
  • Dry-run mode to preview changes
AI-Powered Fixes
$ capyseo analyze ./site --ai --ai-fix
📊 AI Fix Estimation:
Total pages: 42
Fixable issues: 790/1,369 (57.7%)
Estimated cost: $0.0168
✨ Generating AI-powered fixes...
✓ Generated 359 intelligent fixes
✓ Files modified: 42

Multiple Output Formats

Get results in the format that works best for your workflow.

Console

Human-readable terminal output

JSON

Structured data for automation

HTML

Interactive visual reports

SARIF

GitHub Code Scanning integration

CSV

Spreadsheet-compatible data

Why Choose Capyseo?

  • Framework-agnostic — works with any web project
  • 50+ built-in SEO rules covering all best practices
  • Automatic fixes with --fix and AI-powered --ai-fix
  • Multi-provider AI support (Gemini, OpenAI, Anthropic, Ollama)
  • CI/CD integration with SARIF output for GitHub
  • Deep SvelteKit integration available
  • Free and open source under MIT license
50+
SEO Rules
5
Output Formats
10
Categories
4
AI Providers

Ready to Improve Your SEO?

Join developers who use Capyseo to build better-ranking websites. Free and open source forever.