Your website has SEO problems you can't see. Seodisias finds them.
A free desktop SEO crawler that detects 30+ technical issues from broken links to missing schema markup. Runs locally. No subscription. Your crawl data never leaves your machine.
Download for Free, Available on Windows, macOS & Linux
No sign-up required. No credit card. Just download and crawl.
macOS builds are signed with an Apple Developer ID and notarized by Apple. Windows and Linux builds are not code-signed yet, so please verify them with the SHA-256 checksums.
Verify your download (SHA-256) · v0.1.9 · June 27, 2026
Compare the checksum of the file you downloaded with the value below. On macOS and Linux run shasum -a 256 <file>, on Windows run certutil -hashfile <file> SHA256.
| seodisias-darwin-amd64.dmg | fe53a848c4d385c1268d3f114c9fca90a652d9d089709c6a9630fb6bd188703f |
| seodisias-darwin-arm64.dmg | 84ad8cfdcb3ba2f3918c8532531fdcb1cf8b5c25e7b644c8667a286333bab770 |
| seodisias-linux-amd64.tar.gz | 86cc937657231eb05a52385ea2340ac4fb09c929a770eabf69187295e6230bdd |
| seodisias-windows-amd64.zip | 6ff467692e8d2147b1c9d4defe44795bbe34c2c7684276ece7233f15052bc8a3 |
Checksums are published by GitHub for every release asset, see GitHub Releases.
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Or tell us which features matter →What It Finds
Crawl & Discovery
XML Sitemap Inspection
Crawls basic or complex nested sitemaps and tells you what URLs are in it what are missing etc.
Response Code Tracking
Monitors HTTP status codes across your site, identifying 4xx and 5xx errors so you can fix broken pages and server issues.
Redirection Monitoring
Keeps track of both temporary and permanent redirections.
URL Analysis
Validates URL structure, detects parameter issues, and identifies encoding problems to keep your URLs clean and search-engine friendly.
URL Depth Analysis
Measures URL depth in your site's structure, helping ensure priority pages aren't buried too far from the homepage to improve ranking.
JavaScript Rendering
Optionally renders JavaScript-heavy pages during crawl, so single-page applications and dynamic content are fully analyzed.
On-Page SEO
Title and Meta Description Inspector
Finds missing, duplicate, or poorly sized titles and descriptions for easy review and optimization.
Header Verification
Verifies if the page headings follow a proper hierarchy.
Content Value Analysis
Measures the quality of your pages content and provides reports.
Media Issues
Checks your image tags for accuracy and identifies any missing information.
Duplicate Content Detector
Detects and manages duplicate pages to prevent content repetition.
Social Media Tag Checker
Examines and reports on the social media tags on your pages.
Technical Health
SSL Details
Reviews and reports on your page's SSL certificate.
HTTPS & Mixed Content Detection
Verifies HTTPS enforcement and flags mixed content issues where insecure HTTP resources are loaded on secure pages.
HTTP Compression Checker
Detects whether your server uses Gzip, Brotli, or Deflate compression, helping reduce page sizes and improve loading speed.
HTTP Caching Headers
Analyzes Cache-Control, ETag, and Last-Modified headers to ensure your pages are cached efficiently for faster load times.
Mobile Friendly Check
Validates viewport meta tags, font sizing, and mobile usability settings to ensure your pages are optimized for mobile devices.
Page Load Time Monitor
Allows you to track the loading times of your pages.
Favicon Checker
Validates the presence and format of your site's favicon and Apple touch icons, ensuring proper display across browsers and devices.
Security Tag Inspector
Analyzes security-related tags within your pages.
Domain Details
Provides information about your domain's age.
PDF Report Export
Generate comprehensive, professionally formatted PDF reports of your crawl results to share with clients or your team.
AI & Future-Ready
llms.txt Checker
Checks for the presence of llms.txt, the emerging standard that helps AI crawlers and large language models understand your site's content.
Structured Data Validation
Detects JSON-LD and Schema.org markup on your pages, ensuring your structured data is present and properly implemented for rich search results.
Social Media Profile Links
Discovers and lists links to your social media profiles across platforms, helping you verify your social presence is consistently connected.
Robots Txt Checker
Analyzes your robots.txt file and provides insights.
Links & Authority
Internal Linking
Evaluates all inbound links, checking their anchor text or image alt tags, and whether they use follow or nofollow attributes.
External Link Review
Checks the status of every external link and analyzes them.
Canonical Tags
Displays all canonical tags, highlighting missing or mismatched ones, so you can review and organize them efficiently.
Hreflang Analysis
Checks hreflang tags for multilingual and international sites, validating language codes and ensuring correct alternate page references.
Issue Identification
Reviews meta robots tags to check directives such as index, noindex, follow, and nofollow.
Link Graph Visualization
Visualizes your site's internal link structure as an interactive force-directed graph, revealing how pages connect and link equity flows.
Free Today. Free Tomorrow. Here's Why.
Seodisias was built on a simple conviction: core SEO analysis should never be locked behind a paywall.
Every feature you see above is free. Not as a trial, not as a teaser, but as a permanent commitment.
The business model is straightforward: a future premium tier will cover AI-powered analysis, SERP tracking, and team workflows. The crawler itself stays free.
This is a product with a public changelog, active development, and a long-term roadmap.
Why Seodisias?
| Seodisias | Typical SaaS Crawlers | Other Free Tools | |
|---|---|---|---|
| Price | Free forever | $20-$259/month | Free with limits |
| Data Privacy | 100% local | Cloud-based | Varies |
| URL Limits | None | Often capped | 500 URLs typical |
| AI-Ready Checks | llms.txt, Schema | Some | Rare |
| Platforms | Win, Mac, Linux | Web-based | Varies |
| Sign-up Required | No | Yes | Usually |
What teams say
Free, local, easy to download and set up. It crawled my site, flagged some issues, and I downloaded the .md file, handed it to Claude Code, and fixed the flagged issues in my Next.js site and pushed live. All under 10 minutes.
SEO is not aerospace engineering, but like a cockpit it is a field where checklists have to be followed and verified. Seodisias told us what needed to be done on both our new and our old projects, and we followed and verified those steps in Seodisias too. It helped us start new projects the right way and catch the mistakes we had made on older ones. The checklists here have become part of our daily routine.
I crawled squeezevid.com with Seodisias, handed the AI prompts it generated for the flagged issues to Claude, and fixed them. Two days after the fixes went live, my traffic was up 20%.
Tell us how it helps your team. We would love to feature you here.
Send yoursNew in v0.1.5
Is your website ready for AI search?
AI engines like ChatGPT, Perplexity, and Google AI Overviews are changing how users find information. Seodisias checks whether your site is optimized for AI crawlers, structured data, E-E-A-T signals, and more - with a single score out of 100.
Learn more about AI ReadyFrequently Asked Questions
+What is Seodisias?
Seodisias is a free SEO crawler and website analyzer. It crawls your website, detects technical SEO issues, and provides actionable insights to help improve your search engine rankings, all from a desktop application.
+Is Seodisias really free?
Yes, Seodisias is completely free to download and use. There are no hidden fees or usage limits. In the future, premium features may be introduced, but the core crawling and analysis functionality will always remain free.
+What platforms does Seodisias support?
Seodisias is available for Windows, macOS (both Apple Silicon and Intel), and Linux. You can download the appropriate version for your operating system directly from our website.
+What SEO issues can Seodisias detect?
Seodisias can detect over 30 types of SEO issues including broken links, duplicate content, missing or problematic meta tags, heading structure problems, image optimization issues, canonical tag errors, redirect chains, and much more.
+Is my data private when using Seodisias?
Yes. Seodisias runs on your computer and all crawl data and reports stay on your device. The app contacts our server only to check for updates (it sends the app version, operating system and language) and to load our news feed. If you choose to create an account or send feedback, only what you enter is sent. Your website data and SEO reports are never transmitted.
+Can I export SEO reports?
Yes, Seodisias supports exporting your SEO analysis reports as PDF files. This makes it easy to share findings with your team, clients, or stakeholders.
+Does Seodisias support JavaScript rendering?
Yes, Seodisias can analyze JavaScript-rendered pages. This means it can crawl and evaluate single-page applications (SPAs) and other JS-heavy websites just like search engines would see them.
+How is Seodisias different from other SEO tools?
Unlike most SEO tools, Seodisias is completely free, runs locally on your machine for maximum privacy, and provides comprehensive analysis without requiring a subscription. It combines the power of professional SEO crawlers with the simplicity and privacy of a desktop application.
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