Colophon

About This Site

This is a collection of small, single-purpose tools that run entirely in your browser. No data is sent to any server—everything happens client-side using JavaScript.

Inspired by Simon Willison's tools, this site is hosted on GitHub Pages as a collection of static HTML files.

Tools

• JSON Formatter - Format and validate JSON
• Base64 Encoder/Decoder - Encode/decode Base64
• 529 College Savings Projector - Project college savings

Technical Details

Each tool is a standalone HTML file with embedded JavaScript and CSS. This approach means:

• No build process required
• Easy to add new tools (just add a new .html file)
• Works offline (after first load)
• No dependencies or frameworks
• Fast and simple

Development

Repository: github.com/striglia/tools-locallyoptimal
Built with: Vanilla HTML, CSS, and JavaScript
Hosted on: GitHub Pages
Main site: locallyoptimal.com

Adding New Tools

To add a new tool:

1. Create a new tool-name.html file
2. Add it to index.html
3. Update this colophon if desired
4. Commit and push—GitHub Pages will deploy automatically