FormatArc — JSON / YAML / CSV / Markdown Converter

by m-naoki-m · Developer Tools

Manifest V3 Free

View in Chrome Web Store Data as of 16 Oct 2026

Format JSON, convert YAML, CSV, Markdown and HTML — right from your browser. Free, no login, no data sent to servers.

Users

−1 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#157K

#131K among extensions

Version

1.3.0

updated 8 Sep 2026

Users

monthly, 7 months

Latest, 16 Oct 2026: 18 usersMove the mouse over the chart for any month

Ratings count

monthly, 7 months

Latest, 16 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About FormatArc — JSON / YAML / CSV / Markdown Converter

FormatArc converts data formats from your browser toolbar. Open the popup, paste your data, pick a conversion, and copy the result. What it does: - Formats and validates JSON - Converts JSON to and from YAML and CSV - Converts between Markdown tables and CSV - Converts between Markdown and HTML - Right-click selected text on any page to format it as JSON Everything runs locally in your browser. No account, no upload, no data sent to any server. Web version with more conversions: https://formatarc.com