Quick Markdown Formatting Without a Local Prettier Install

Heading spacing — matches Prettier

Adding a blank line before and after headings is one place this tool and Prettier agree.

Before:
Intro.
## Install
Run npm i.

After (this tool and Prettier both):
Intro.

## Install

Run npm i.

Trailing whitespace trimmed — matches Prettier

Both trim trailing whitespace on prose lines. (Trailing spaces shown as ·.)

Before:
Ready to go.··
Ship it.···

After:
Ready to go.
Ship it.

Wrap at 80 — split-only, unlike Prettier's reflow

This tool splits a long line at the width but does not re-join already-short lines into a paragraph first. Prettier's proseWrap can reflow the whole paragraph. Know the difference.

Wrap width: 80 cols

Before (already split into short lines):
This paragraph
was hand-split
into short lines that together describe the build step in detail.

This tool's output (each line wrapped independently; short lines kept):
This paragraph
was hand-split
into short lines that together describe the build step in detail.

Prettier with proseWrap: always would re-join then wrap to 80.

Lists — Prettier normalises, this tool doesn't

Prettier rewrites list markers and indentation to a consistent style. This tool leaves them as written — use the list fixer if you need that.

Input:
* item one
-   item two
+ item three

This tool's output (markers/indent unchanged):
* item one
-   item two
+ item three

For consistent markers, use /markdown-tools/md-list-fixer.

Tables — Prettier aligns, this tool skips

Prettier pads table cells to align pipes. This tool skips table rows entirely. Use table repair for alignment.

Input:
| Name | Role |
|---|---|
| Ada | Eng |
| Grace | Lead |

This tool's output: identical (rows skipped).

For alignment, use /markdown-tools/md-table-repair.

This is a focused spacing pass, not a Prettier reimplementation. It skips list/emphasis/table normalisation and prose reflow, so its output can differ from prettier --write. For an exact match in a Prettier-enforced repo, run Prettier locally.

This tool only splits lines longer than the width; it never re-joins short lines into a paragraph first. Prettier's proseWrap: always re-joins then wraps. If you depend on full reflow, use Prettier.

Unlike Prettier, this tool doesn't standardise */-/+ markers or list indentation. Use the list fixer for consistent lists.

Prettier standardises emphasis (e.g. _ for italic, ** for bold). This tool leaves */_ exactly as written. Use the bold/italic cleaner to standardise them.

Prettier pads table cells; this tool skips table rows. For aligned or repaired tables, use table repair.

There's no plugin system and no printWidth/proseWrap config object — only a Wrap width dropdown (No wrap / 80 / 100 / 120). Plugin-driven formatting requires a local Prettier install.

Trailing-whitespace trimming removes CommonMark two-space hard breaks. Prettier also handles hard breaks (often preferring a backslash). Use \ for breaks that survive either tool.

YAML/TOML frontmatter is split off and re-attached unchanged here. Prettier likewise leaves frontmatter content alone, so both are safe on docs-as-code pages.

Free is 1 MB / 500,000 characters per file. Most ad-hoc snippets are tiny, but a large pasted doc may need Pro (10 MB / 5,000,000 chars). The character cap is separate from byte size.

Task lists, strikethrough, autolinks, and other GFM constructs are treated as prose/content and preserved as-is — they're not converted. To convert GFM to CommonMark, use the GFM-to-CommonMark tool.