Gridwell

Fast multi-format table rendering from a declarative IR

Gridwell is a Rust library that accepts a rich table Intermediate Representation (IR) and renders it to many output formats. It serves as a universal table rendering backend.

Key Features

11 output formats from a single declarative JSON input
Sub-millisecond rendering for typical tables (Rust core)
Language bindings for Python (PyO3), R (extendr), and C (FFI)
Rigorous validation catches structural errors before rendering
CLI tool for command-line conversions

Supported Formats

Format	Type	Description
HTML	Text	Semantic HTML5 table
LaTeX	Text	longtable with booktabs
Typst	Text	Typst table markup
RTF	Text	Rich Text Format
SVG	Text	Standalone SVG image
ANSI	Text	Terminal output
Pandoc	Text	Pandoc AST JSON
Quarto	Text	Quarto Markdown
DOCX	Binary	Microsoft Word
XLSX	Binary	Microsoft Excel
PPTX	Binary	Microsoft PowerPoint

How It Works

┌─────────────────────────┐
│  Upstream Tool          │
│  (gt / Great Tables)    │
└───────────┬─────────────┘
            │ IR (JSON)
            ▼
┌─────────────────────────┐
│  gridwell               │
│  Parse → Validate       │
│  → Render               │
└───────────┬─────────────┘
            │
    ┌───────┼───────┐
    ▼       ▼       ▼
  HTML    LaTeX   DOCX  ... (11 formats)

Quick Example

# Convert a table IR to HTML
gridwell convert table.json --to html

# Validate an IR file
gridwell validate table.json

# Pipe from stdin
cat table.json | gridwell convert --to latex

Getting Started

Head to the Getting Started guide or browse the live demos to see gridwell in action.