Observed arrival · 2026-11-06

DataTools JP keeps CSV chores in the browser

datatoolsjp.com Visit website

Editorial interest 77/100 Selection signal · not a rating of the site

A free, no-registration set of Japanese-language tools for converting and cleaning CSV and Excel files in the browser.

Landing page captured for the 2026-11-06 issue.

For: Japanese users cleaning or converting CSV and Excel files
Worth noticing: The XLSX-to-CSV tool lists sheet selection, three encodings, comma or tab delimiters, and CRLF or LF line endings.

Field notes

The homepage describes five free browser-based utilities: CSV-to-XLSX, UTF-8/UTF-8 BOM/Shift_JIS conversion, column joining or splitting, duplicate-row removal, and XLSX-to-CSV. It says files stay on the user's device, supports files up to 20 MB, and offers a 20-row preview for XLSX-to-CSV. Japanese guides cover encoding problems and preserving leading zeroes; a Pro tier is described only as planned.

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Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

◎NicheUnusually specific use

ƒJavaScriptBrowser-side code central

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