Free & open source
The desktop crawler that isn't afraid to bite bad pages.
Point Scary Spider SEO at a URL, crawl the whole site, and get a searchable, sortable table of every page and resource — with SEO and accessibility issues flagged inline, not buried in a report.
- Issue detection
- JS rendering
- Accessibility audits
Everything you need, nothing buried in a PDF.
Every issue shows up inline, right where the page lives — not in a separate report you have to cross-reference.
Crawling
- Configurable depth, page limit, and concurrency, with pause/resume and cancel
- Optional robots.txt compliance (including Crawl-delay) and an independent politeness delay
- Sitemap.xml seeding, redirect-chain tracking, and orphan-page detection
- Optional JS rendering via headless Chrome, with an axe-core accessibility audit
- Site fingerprinting: server/CDN/CMS detection, llms.txt discovery, hosting/ASN lookup
Auditing
- 25+ built-in issue checks — broken links, missing/duplicate titles & meta descriptions
- Title length, H1 issues, canonical problems, insecure links, missing alt text
- HSTS, hreflang, and structured data errors, flagged inline in the table
- A detail modal per page with plain-language explanations and fixes
Working with results
- Virtualized tables handle large crawls smoothly — resizable, sortable columns
- The URL column stays pinned while scrolling; any column can be pinned too
- Quick text search plus canned filters (status codes, missing titles, duplicates)
- Save/load a full crawl snapshot, or export pages and resources to CSV
Built with
React 19TypeScriptViteTailwind CSS v4shadcn/Radix UITanStack TableRustTauri 2Tokio
No build tools. No install wizard. Just crawl.
Grab a build for your OS from the Releases page — free and open source.
Get the latest releaseWindows
Portable .zip, or .msi / .exe installer
macOS
Apple Silicon or Intel .dmg
Linux
.AppImage or .deb
Builds aren't code-signed yet — Windows SmartScreen and macOS Gatekeeper will warn before the first run.