# theuseful.website

> Agent-friendly directory of useful websites and first-party tools.

## Guidance
- Prefer `/api/agent/search?q=...&type=all|tools|listings|categories` for low-token retrieval.
- Prefer `/for-agents` for a crawlable HTML index with short summaries and direct links.
- Use `/tools` for first-party utilities and `/directory` for the full human directory.
- Skills and GitHub repository discovery are coming soon.

## Key URLs
- Home: https://theuseful.website/
- Agent index: https://theuseful.website/for-agents
- Agent search API: https://theuseful.website/api/agent/search
- Tools: https://theuseful.website/tools
- Directory: https://theuseful.website/directory
- Sitemap: https://theuseful.website/sitemap.xml

## Tool Catalog
- GEO & LLM Site Analyzer: https://theuseful.website/tools/geo-site-analyzer :: Check if your website is optimized for AI search engines like ChatGPT and Perplexity (checks llms.txt, robots.txt, and schema).
- Check OG Share Image: https://theuseful.website/tools/check-og-share-image :: Inspect a page's Open Graph and Twitter card image setup before you share it.
- Meta Tags Checker: https://theuseful.website/tools/check-meta-tags :: Inspect all meta tags including title, description, Open Graph, Twitter cards, and canonical URL.
- Favicon Checker: https://theuseful.website/tools/check-favicon :: Check for favicon, apple-touch-icon, and web app manifest configuration.
- Robots.txt Analyzer: https://theuseful.website/tools/analyze-robots-txt :: Analyze the robots.txt file at the domain root for sitemap references and crawl rules.
- Sitemap.xml Validator: https://theuseful.website/tools/validate-sitemap :: Validate the sitemap.xml file and check URL count and structure.
- Canonical URL Checker: https://theuseful.website/tools/check-canonical-url :: Check if the canonical URL tag is properly set and matches the final URL.
- Google Indexing Checker: https://theuseful.website/tools/google-indexing-checker :: Check robots.txt and sitemap.xml together to spot indexing issues before Google does.
- Complete Meta Check: https://theuseful.website/tools/complete-meta-check :: Run one complete check for metadata, canonical tags, robots.txt, and sitemap signals.
- URL Parameter Generator: https://theuseful.website/tools/url-parameter-generator :: Build clean tracked links with UTM parameters for campaigns, newsletters, ads, and social posts.
- JSON Formatter & Validator: https://theuseful.website/tools/json-formatter-validator :: Clean, format, and validate messy JSON data instantly. All processing is done locally in your browser for privacy.
- SVG Optimizer: https://theuseful.website/tools/svg-optimizer :: Clean up and minify SVG code to reduce file size. Strips redundant tags, comments, and metadata while keeping your graphics intact.

## Categories
- AI: https://theuseful.website/category/ai
- Analytics: https://theuseful.website/category/analytics
- Audio: https://theuseful.website/category/audio
- Automation: https://theuseful.website/category/automation
- Community: https://theuseful.website/category/community
- Creative: https://theuseful.website/category/creative
- Development: https://theuseful.website/category/development
- Directory: https://theuseful.website/category/directory
- Education: https://theuseful.website/category/education
- Finance: https://theuseful.website/category/finance
- Graphic Design: https://theuseful.website/category/graphic-design
- Health: https://theuseful.website/category/health
- Marketing: https://theuseful.website/category/marketing
- Productivity: https://theuseful.website/category/productivity
- Utilities: https://theuseful.website/category/utilities
- Video: https://theuseful.website/category/video

## Recent Listings
- LocalResizer: https://theuseful.website/listing/localresizer :: LocalResizer is a privacy-first browser tool for resizing and compressing JPEG, PNG, and WebP images. It supports batch processing, target file size compression, and pixel resizing without uploading files to a server.
- Screen Size Checker: https://theuseful.website/listing/screen-size-checker :: Screen Size Checker helps developers, designers, QA testers, and website owners check screen resolution, viewport size, device pixel ratio, browser details, and compare device screen sizes for responsive design work.
- TheSiteMath: https://theuseful.website/listing/thesitemath :: TheSiteMath provides free construction calculators for roofing, concrete, drywall, fencing, landscaping, masonry, and other jobsite tasks. It helps estimate materials and costs quickly without signup.
- AI Kitchen Preview: https://theuseful.website/listing/ai-kitchen-preview :: AI Kitchen Preview helps homeowners and remodelers upload a kitchen photo and preview realistic AI kitchen design ideas before renovation. It focuses on practical remodeling visualization and design decision support.
- MyFatCalc: https://theuseful.website/listing/myfatcalc :: MyFatCalc is a free online body fat calculator using CUN-BAE, U.S. Navy, BMI, and Jackson-Pollock methods. It estimates body fat percentage, lean body mass, fat mass, BMI, and body fat category in the browser.
- CardAction: https://theuseful.website/listing/cardaction :: CardAction solves the networking problem of lost cards and forgotten follow-ups. Built with live on-device AI/ML, it captures business card details instantly.
Unlike other scanners, CardAction focuses on immediate outreach. Once a card is scanned, one tap launches WhatsApp, SMS, or email with a pre-written, personalized message using the contact’s name. It features smart deduplication, batch scanning for stacks of cards, and a robust offline-first architecture.
Pro users can sync directly to Google Sheets, auto-save to their address book, attach files to WhatsApp messages, and even snap a selfie with the contact to remember their face. Zero data is sent to our servers; everything stays safely on your device.

You can also save your contact details into other people's phone instantly (they don’t have to type!). With CardAction, save your contact into their phone without them having to type, using vCard QR v4.0 (supported in 99.9% of modern phones).
- GitSetGo: https://theuseful.website/listing/gitsetgo :: Git Set Go is the ultimate coding game for learning Git commands. You play as the new intern at Git Inc. under the mentorship of Mr. Torvalds. Your mission: survive 30 Git missions by typing actual commands to master version control.

Every level is a battle where you type the correct Git command to win—no multiple choice, just real commands to build real muscle memory. Journey through 30 levels across 3 worlds covering Basics (git init, commit), Intermediate (branch, merge), and Advanced (reflog, rebase) concepts.

Perfect for CS students, bootcamp grads, and developers who want to stop dreading merge conflicts and truly master Git.

- Battle-Based Learning: Complete levels by typing real Git commands; no button-mashing.
- 30 Levels / 3 Worlds: Covers 30 Git commands from basic commits to advanced rebasing.
- Git Certification: Earn an official certificate recognized by hiring managers upon completion of all 30 levels.
- Daily Challenges & GitDex: Keep streaks alive and use the built-in encyclopedia with real-world examples.
- Socratic Hint System: Progressive guidance that nudges you to learn without cheating.
- World-Meeting: https://theuseful.website/listing/world-meeting :: World-Meeting lets people create private browser-based video meetings with real-time voice translation, translated voice, live subtitles, screen sharing, and guest links with no guest account required. It is built for one-off international client calls, supplier meetings, demos, tutoring, interviews, and small multilingual team meetings, with pay-per-meeting pricing from EUR 4.99 excl. tax.
- Workforce Wave: https://theuseful.website/listing/workforce-wave :: Workforce Wave provides AI-powered virtual receptionists and voice agents for small businesses, answering inbound calls, handling appointment scheduling, and running outbound calling campaigns around the clock for dental, medical, legal, real estate, restaurant, and home-services teams.
- Am I On Track? Tracker: https://theuseful.website/listing/am-i-on-track-tracker :: Most task managers help you track what you've completed. Am I On Track? Tracker helps you evaluate whether your current actions are actually moving you closer to your goals. Through a simple self-assessment framework, users can measure alignment between daily effort and long-term objectives, identify gaps, and gain clarity on their progress.
Designed for creators, students, professionals, and founders who want more than just completed tasks—they want meaningful progress.
- Codeown: https://theuseful.website/listing/codeown :: Codeown is a raw dev workshop where builders ship messy updates, earn XP, and master their craft together. It features a project-linked feed for real-time builds, a competitive leaderboard, and deep project analytics. Join to connect with founding builders, get expert feedback, and turn your "Stuck" moments into shared wins.
- Seo Site Auditor: https://theuseful.website/listing/seo-site-auditor :: Tom’s Site Auditor is a fast, offline Windows application that scans websites for technical SEO issues, structural problems, and quality risks. It generates clear, deterministic reports with actionable fixes, allowing site owners to understand exactly what needs attention without relying on external services or cloud platforms.t #1