Observed arrival · 2026-11-06
Formatcast: JSON to CSV without spreadsheet surprises
A browser-based converter that turns nested JSON into CSV, with controls for arrays, delimiters, and spreadsheet-specific formatting.
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- People moving nested JSON into spreadsheets
- Worth noticing
- Its Excel formula guard adds a tab to risky values, and the page notes that the tab remains in the data.
Field notes
The interface exposes choices for delimiters, line endings, headers, null handling, quoting, and key separators, alongside several array-flattening strategies. Its Excel settings include a byte order mark and a text-preservation option that writes values such as 02108 in a form Excel treats as text. The page also links to conversion guides for Python, PowerShell, and jq.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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