Excel to CSV : Easy Converter

Excel ⇄ CSV is a straightforward, one-time-purchase app for converting between Excel (.xlsx) and CSV files.

■ Overview

Excel ⇄ CSV skips the clutter of editing features and focuses purely on conversion. Pick a file, set your options, choose a destination — done. Because you can control encoding, delimiter, and line endings precisely, it helps avoid the garbled text and formatting issues that often come up when importing data into business systems or other tools.

■ Key Features

[Excel → CSV]
· Select an .xlsx file
· Convert a single sheet or all sheets at once
· Choose encoding (UTF-8 / UTF-8 BOM / Shift_JIS)
· Choose delimiter (comma / semicolon / tab)
· Choose line ending (LF / CRLF)
· When converting all sheets, each sheet is exported as its own CSV file

[CSV → Excel]
· Select a CSV file
· Auto-detect encoding (UTF-8 / UTF-8 BOM / Shift_JIS), with manual override
· Auto-detect delimiter (comma / semicolon / tab), with manual override
· Sheet name auto-filled from the file name, editable
· Save as an .xlsx file

[Shared Features]
· Choose a destination folder, or set a default destination
· Number format handling (automatic detection or treat all as text)
· Sound notification when conversion completes
· Overwrite confirmation when a file with the same name already exists
· Recent files history (re-convert or delete)
· Choose the app's appearance (System / Light / Dark)
· Available in Japanese and English

[macOS Only]
· Select files by dragging them onto the app from Finder
· Drop a folder to batch-convert all .xlsx/.csv files inside it
· Reveal the output location in Finder after conversion

■ Who It's For

· Anyone who regularly exchanges Excel and CSV files at work
· Anyone who needs precise control over CSV encoding and delimiters for importing data into business systems or tools
· Anyone who has run into garbled text with Japanese CSV data
· Anyone who wants the same conversion workflow across Mac, iPhone, and iPad

■ Highlights

· Works fully offline — the files you select are never sent to an external server
· No ads, no subscription — a one-time purchase
· Available on Mac, iPhone, and iPad

■ Privacy

Any file you select for conversion is processed entirely on your device and is never sent to an external server.