100tools

100tools

Essential online tools for SEO, DNS, security, and web development.

Site Audit

Analyze pages for SEO, metadata, and sharing previews.

SEO Checker
Audit core on-page SEO signals, then route into deeper checks.
Meta Checker
Inspect meta tags, Open Graph, and sharing metadata.
Link Preview
Preview how a URL may render across sharing contexts.
OG Image Generator
Generate share images without leaving the browser flow.

Domain & DNS

Inspect DNS records and validate domain configuration.

DNS Lookup
Check common DNS records and verify domain configuration.
Domain Setup Checker
Validate DNS and HTTP setup before a site goes live.

Security

Local-first tools for authentication and credentials.

TOTP Generator
Generate one-time codes locally for setup and debugging.

Assets

Generate icons, images, and other static assets.

Icon Generator
Produce favicon and app-icon bundles from a source image.