Convert CSV to compact GFM table
Input
Product,Price,Quantity
Widget,19.99,100
Gadget,9.50,50Example output
| Product | Price | Quantity |
| :--- | ---: | ---: |
| Widget | 19.99 | 100 |
| Gadget | 9.50 | 50 |Markdown Table Generator & Formatter
CSV & Tables100% Client-SideReady
TEXT
0 lines0 chars
0 B / 97.7 KB
Read-only
0 lines0 chars
0 B
About this tool, examples & FAQ
Convert CSV, TSV, or spreadsheet data into aligned, standards-compliant GitHub Flavored Markdown (GFM) tables with automatic numeric alignment and pipe escaping.
Key facts
| Markdown specification | GitHub Flavored Markdown (GFM) Spec §4.10 (Tables Extension) |
|---|---|
| Column alignment | Auto-detects numeric vs text columns (:--- left, :---: center, ---: right) |
| Input formats | Comma (CSV), Tab (TSV), Semicolon (;), and Pipe (|) with quote escaping |
| Max input size | 100 KB |
| Execution deadline | 1.5 s |
| Processing location | Browser-only: table formatting runs locally in a Web Worker |
How to use
- Paste spreadsheet data, CSV, TSV, or existing unaligned Markdown table into the input box.
- Select your target operation: Format GFM Table, Compact Table, or Table to JSON.
- Choose column alignment (Auto detects numeric right-align, or force Left/Center/Right).
- Toggle 'First Row is Header' to control the header and delimiter divider row.
- Click 'Run' or press Ctrl+Enter to generate clean, perfectly aligned Markdown tables.
Example
Edge cases
Embedded pipe character escaping
Automatically escapes unescaped pipe characters (|) inside cell content into (\|) so table column parsing does not break.
Uneven column counts across rows
Normalizes ragged rows by padding shorter rows with empty cells, ensuring every row matches the table's maximum width.
Automatic numeric detection
Recognizes numbers formatted with currency symbols ($19.99) and commas (1,000) to right-align numeric data columns.
How it works
- Detects input delimiters (comma, tab, pipe, semicolon) with CSV quote parsing support.
- Calculates maximum text width per column for clean visual pipe alignment.
- Analyzes column values to determine text (left) or numeric (right) alignment.
- Constructs the GFM header, delimiter row (:---, :---:, ---:), and padded data rows.
Related workflows
CSV ↔ Markdown Table Converter
Convert bi-directionally between CSV/TSV data and GitHub Flavored Markdown (GFM) pipe tables with column alignment, pretty padding, and spreadsheet injection protection.
CSV / TSV Viewer & Validator
Inspect, validate, and preview CSV and TSV tabular data. Auto-detects delimiters, diagnoses malformed rows or ragged columns, and reports row/column statistics.
Markdown Preview
Convert Markdown into safe, standalone HTML for previewing and copying.
Frequently asked questions
What is a GitHub Flavored Markdown (GFM) table?
GFM tables are an extension to standard Markdown that organizes data into rows and columns using vertical pipes (|) and hyphens (-). The second line serves as a delimiter row that specifies text alignment using colons (:--- left, :---: center, ---: right).
How does auto column alignment work?
In 'Auto' alignment mode, the generator checks each cell in a column. If all values are numbers (including decimal points, currency symbols, and percentages), the column is right-aligned (---:) for financial and numeric readability. Otherwise, it defaults to left-aligned (:---).
Is my table data sent to a remote server?
No. All table generation and formatting executes entirely in your browser using client-side Web Workers. No data is stored, logged, or uploaded.
References
- GitHub Flavored Markdown Spec: §4.10 Tables (Extension) — Authoritative specification for pipe-delimited Markdown tables and delimiter alignment syntax