Elysia Tools: Tools, Visualizations, and Samples in One Place

Markdown Report Bundler

Bundle multiple Markdown files into a single PDF report

Document Tools

GitHub README to PDF

Fetch a GitHub README and render it to a styled PDF

Document Tools

HTML to PDF Renderer

Render a limited HTML subset into a PDF with a deterministic layout

Document Tools

GeoJSON to GPX Converter

Convert GeoJSON format to GPX (GPS Exchange Format) format

Format Conversion

Markdown to PDF Theme Pack

Convert Markdown to PDF with dark, light, or print-ready themes

Document Tools

PDF Page Numbering Styles

Convert HTML to PDF with Roman, Arabic, or chapter-prefixed page numbers

Document Tools

PDF Header/Footer Snippets

Convert HTML to PDF with reusable logo, title, and date snippets

Document Tools

KML to GeoJSON Converter

Convert KML (Keyhole Markup Language) format to GeoJSON format

Format Conversion

Linear Sigma Model

Explore Spontaneous Symmetry Breaking, Goldstone Theorem, and Higgs Mechanism

Gauge Theory Visualization

Explore Gauge Symmetry, Yang-Mills Theory, and the Unified Framework of Modern Physics

Heart Curve Visualization

Explore the Romance of Mathematics - Parametric Heart Curve

Cycloid & Trochoid

Trace the path of a point on a rolling circle

Black Swan Theory Visualization

Exploring Extremistan, Fat Tails, and Anti-fragility

Superellipse (Lamé Curve)

Interactive visualization of shapes between circle and rectangle

Nash Equilibrium Visualizer

Interactive exploration of strategic equilibrium in game theory

Golden Angle Phyllotaxis

Explore the mathematical beauty of plant seed arrangement - Polar formulas: θ = n × 137.5°, r = c√n

Video H.265 Samples

Sample video files encoded in H.265 (HEVC) format

4 samples

Video VP9 Samples

Sample video files encoded in VP9 format

4 samples

Video H.264 Samples

Sample video files encoded in H.264 (AVC) format

4 samples

Video AV1 Samples

Sample video files encoded in AV1 format

4 samples

Path Analyzer Samples

Comprehensive collection of file system paths from Windows, Linux, and macOS for path analysis and testing

11 samples

Code Documentation Samples

Code samples with various documentation styles including JSDoc, JavaDoc, Python docstrings, and TypeScript annotations

10 samples

Changelog Extractor Samples

Various changelog formats for testing changelog parsing and extraction tools

6 samples

URL Query Analyzer Samples

Comprehensive collection of URLs with query parameters for testing URL parsing, encoding validation, and parameter extraction

10 samples