Observed arrival · 2026-09-11
Markdown Preflight: Check Before You Paste
A browser-based checker shows how one Markdown draft will survive—or break—when pasted into Beehiiv, Substack, WordPress, X, and LinkedIn.
Field notes
The project compares Markdown behavior across five named publishing destinations rather than treating Markdown as a universal interchange format. Its worked examples distinguish outcomes such as Beehiiv retaining tables, Substack destroying them, WordPress failing to fill the post title, and X or LinkedIn stripping formatting. The site says each rule is tied to a dated live paste, screenshot, and destination-specific evidence, with uncovered constructs marked unknown.
Observed signals
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Editorial observations of this landing page, not a rating.
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