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 in a new folder

[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
• Correctly handles quoted fields, escaped quotes, and line breaks inside cells
• 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), keeping leading zeros such as 00123
• Open or share the converted file right after conversion
• 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)
• Large text and TalkBack supported
• Available in Japanese and English

■ 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 on Android, iPhone, iPad, and Mac

■ HIGHLIGHTS

• Works fully offline — the app does not even request internet access, and the files you select are never sent to an external server
• No ads, no subscription, no in-app purchases — a one-time purchase
• Uses Android's built-in file picker, so no broad storage permission is needed

■ PRIVACY

Any file you select for conversion is processed entirely on your device and is never sent to an external server. The app has no accounts, no ads, and no analytics.

Requires Android 8.0 or later. Legacy .xls files are not supported.