Free web development tools by ThatDeveloperGuy.
10 client-side utilities for web developers, SEO practitioners, and small business owners. Everything runs in your browser. No accounts, no tracking, no upsell. Built and maintained by Joseph W. Anady, SDVOSB-certified web developer.
Schema Markup Generator
Generate valid JSON-LD for Organization, LocalBusiness, Person, Service, FAQPage, Article, Product, Event.
llms.txt Builder
Generate the new AI-citation file for your site. The 2026 standard for telling LLMs how to cite your content.
robots.txt Generator
Build a robots.txt with 2026 AI bot directives: GPTBot, ClaudeBot, PerplexityBot, Google-Extended, and more.
Color Contrast Checker
WCAG 2.2 AA + AAA contrast ratio checker. Required for Section 508 compliance.
Open Graph Preview
Preview how your URL renders on Facebook, X/Twitter, LinkedIn, Slack, Discord.
JSON-LD Validator
Validate Schema.org JSON-LD syntax + structure. Check for common errors.
.htaccess Generator
Generate Apache .htaccess rules for redirects, caching, security headers.
Redirect Chain Checker
Trace HTTP redirect chains. Detect 301/302 loops + accidental chains hurting SEO.
Image Alt Text Linter
Audit your HTML for missing, empty, or stuffed alt text on images. WCAG 2.2 compliance.
Sitemap Segmenter
Split a large sitemap.xml into segmented sitemap-*.xml files. Faster Google discovery.
Built and maintained by Joseph W. Anady at ThatDeveloperGuy. Need professional help? Get a free 48-hour audit.