Markdown Table Builder (GFM)

Markdown table syntax (GFM)

GitHub Flavored Markdown (GFM) is supported almost everywhere: GitHub, GitLab, Notion, Obsidian, ChatGPT, Claude, Discord. Syntax:

| Header 1 | Header 2 | Header 3 |
| :------- | :------: | -------: |
| Left     | Center   | Right    |
| cell     | cell     | cell     |

• First row: header, automatically bold.
• Separator row: :--- (left), :---: (center), ---: (right).
• Pipes inside cells: escape with \\|.
• Line breaks inside cells: use <br> (HTML), NOT \\n.

When to use it

• Docs / README: comparison tables, API specs, feature lists.
• GitHub issues / PRs: test data, screenshot diffs in table form.
• Notion / Obsidian: paste tables from this tool into your note system.
• Blogs / Docs sites: Astro/Hugo/Docusaurus render markdown tables natively.
• LLM prompts: structured table input helps the model parse better than long JSON.

Pretty vs Compact mode

• Pretty mode (default): balanced column widths via padding — the .md file looks great in any text editor.
• Compact mode: no padding — denser source. GitHub renders both identically.

Use Pretty for READMEs and docs; Compact for LLM prompts (saves tokens).