markdowntable2image（markdowntable2image 表格）

Table2Image

🇬🇧 English | 🇨🇳 中文

Convert tables to beautiful PNG images for chat platforms.

GitHub: https://github.com/UMRzcz-831/table-to-image-skill

Tech Stack: Playwright + Chromium for perfect emoji and font rendering.

Prerequisites

• Node.js: >= 18.0.0
• Network: Internet connection required for first run (Chromium download ~100MB)

Installation

# Install dependencies
npm install

# Download Chromium (one-time, ~100MB)
npx playwright install chromium

Performance

💡 Tip: The browser instance is automatically reused after the first render, making subsequent table generations nearly instant.

Quick Start

Method 1: CLI (for simple tables)

# Convert JSON data to table image
echo '[{"name":"Alice","score":95}]' | node scripts/table-cli.mjs --dark --output table.png

# Or use a JSON file
node scripts/table-cli.mjs --data-file data.json --theme discord-dark --output table.png

Method 2: Programmatic API (recommended)

import { renderTable, renderDiscordTable } from './scripts/index.js';

// Quick Discord table
const image = await renderDiscordTable(
  [{ name: 'AAPL', change: '+2.5%' }],
  [
    { key: 'name', header: 'Stock' },
    { key: 'change', header: 'Change', align: 'right' }
  ],
  '📊 Market Watch'
);

// Send to Discord
await message.send({ attachment: image.buffer });

Method 3: Auto-convert markdown tables

import { autoConvertMarkdownTable } from './scripts/index.js';

// Automatically detect and convert
const result = await autoConvertMarkdownTable(message, 'discord');
if (result.converted) {
  await message.send({ attachment: result.image });
}

When to Use This Skill

• Discord/Telegram/WhatsApp: These platforms don't render markdown tables well
• Financial data: Stock prices, portfolio reports with conditional formatting
• Leaderboards: Rankings with medals and color-coded positions
• Comparison tables: Side-by-side feature comparisons
• Any tabular data: When visual presentation matters

Themes

Theme	Best For	Preview
discord-light	Discord light mode (default)
discord-dark	Discord dark mode
finance	Financial reports
minimal	Clean/simple
sweet-pink	Stylish dark + pink accent
deep-sea	Classic blue + cream white
wisteria	Retro purple + lime green
pond-blue	Deep navy + soft cyan
camellia	Warm red + pale pink

Custom Themes

You can also pass a custom theme object directly to theme. For convenience, you only need to provide two colors — primary and secondary — and the full theme will be generated automatically:

const image = await renderTable({
  data: [{ name: 'Alice', score: 95 }],
  columns: [
    { key: 'name', header: 'Name' },
    { key: 'score', header: 'Score', align: 'right' }
  ],
  theme: {
    primary: '#e6397c',    // accent color (header, text, border)
    secondary: '#1a1a1d'   // base color (background, rows)
  }
});

Or pass a complete custom theme object with all 7 colors:

const image = await renderTable({
  data: [{ name: 'Alice', score: 95 }],
  columns: [...],
  theme: {
    background: '#1a1a1d',
    headerBg: '#e6397c',
    headerText: '#1a1a1d',
    rowBg: '#1a1a1d',
    rowAltBg: '#2a2a2d',
    text: '#e6397c',
    border: '#e6397c'
  }
});

Advanced Usage

Conditional Formatting

import { renderTable } from './scripts/index.js';

const image = await renderTable({
  data: stocks,
  columns: [
    { key: 'symbol', header: 'Symbol' },
    { 
      key: 'change', 
      header: 'Change',
      align: 'right',
      formatter: (v) => `${v > 0 ? '+' : ''}${v}%`,
      style: (v) => ({ color: v > 0 ? '#43b581' : '#f04747' })
    }
  ],
  theme: 'discord-dark'
});

Custom Column Widths

columns: [
  { key: 'name', header: 'Name', width: 150 },
  { key: 'description', header: 'Desc', width: 300, wrap: true, maxLines: 3 }
]

Scripts

• scripts/table-cli.mjs - Command-line interface
• scripts/index.js - Programmatic API

See references/api.md for complete API documentation.

Examples

See references/examples.md for common use cases and code samples.