Which rules does it check?

Maximum line length (MD013), single top-level H1 (MD025), no trailing whitespace (MD009), consistent bullet markers (MD004), ATX-only heading style (MD003), blank lines around headings (MD022), blank lines around fenced code (MD031), and no empty links (MD042). Each rule has its own toggle.

Is it the same as markdownlint?

Inspired by DavidAnson/markdownlint but dependency-free and runs 100% in your browser. Covers the 8 most impactful rules from the markdownlint rule set.

Yes. Each rule has its own toggle. Turn off anything you don't want flagged (e.g., max line length for documents where long lines are OK).

Does it check inside code blocks?

No. Fenced code blocks are skipped so code samples don't trigger false positives.

Markdown-linter og stiltjek

Tjek Markdown for almindelige stilproblemer: efterfølgende mellemrum, overskriftsgab, inkonsekvente punkttegn.

Markdown-input 0 tegn

Problemer 0 total

0Errors

0Warnings

0Info

Paste Markdown to start linting.

Maks linjelængde

Enkelt H1 Ingen efterfølgende mellemrum Konsistente punkttegn Kun ATX-overskrifter Tomme linjer omkring overskrifter Tomme linjer omkring kodeblokke Ingen tomme links

Oversigt — Hvad gratis Markdown-linter og stiltjek gør

Hvad dette gratis værktøj er

Free Markdown Linter checks a document against the 8 most impactful style rules from the markdownlint rule set — line length, single H1, trailing whitespace, consistent bullets, ATX headings, blank li

Privatliv: Dette værktøj kører helt i din browser. Din tekst uploades, logges eller caches aldrig. Luk fanen, og den er væk. Verificer i DevTools → Network: ingen forespørgsler sendes.

Hvorfor det er gratis (og hvordan vi holder det gratis)

Läuft im Browser.

Brugstabel

Hurtigoversigt

Input	Output	Typisk størrelse	Hastighed	Login kræves
Markdown (.md)	Lint report (issues + stats)	Any document size	< 50 ms	No