M↓✓
Markdown Linter
Check Markdown for heading, spacing, link and list problems.
13
Problems
| Line | Rule | Problem |
|---|---|---|
| 1 | MD022 | Heading should be surrounded by blank lines |
| 2 | MD022 | Heading should be surrounded by blank lines |
| 3 | MD009 | Trailing spaces |
| 3 | MD001 | Heading level jumps from H2 to H4 |
| 3 | MD022 | Heading should be surrounded by blank lines |
| 4 | MD034 | Bare URL – use <…> or [text](url) |
| 6 | MD012 | Multiple consecutive blank lines |
| 8 | MD004 | Inconsistent list marker “-” (first list used “*”) |
| 10 | MD045 | Image without alt text |
| 12 | MD040 | Code block without language |
| 15 | MD025 | More than one H1 heading |
| 15 | MD024 | Duplicate heading “Title” |
| 15 | MD022 | Heading should be surrounded by blank lines |
Runs entirely in your browser. Nothing is sent anywhere.
How it works
- 1Paste or type your text.
- 2Choose the options you need.
- 3Copy or download the result.
About this tool
Markdown Linter: Check Markdown for heading, spacing, link and list problems. Paste your text and the result appears immediately, ready to copy or download. Everything happens locally in your browser — nothing you paste is uploaded or stored.
How do I use the Markdown Linter?
Paste or type your text. Choose the options you need. Copy or download the result.
Is the Markdown Linter free?
Yes. It is completely free with no sign-up, no usage limits and no watermark.
Is my data sent to a server?
No. Everything is calculated locally in your browser. Nothing you enter is uploaded, logged or stored.
Does it work on my phone?
Yes. It works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux — no app needed.