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HomeConvertConvert to CSV

Convert to CSV

Convert any file to Comma-Separated Values format — free, fast, and private

スプレッドシート
ファイルを選択

またはファイルをここにドラッグ&ドロップ

最大ファイルサイズ:2GB

ファイルはブラウザ内でローカルに処理されます。サーバーにアップロードされません。

About CSV Format

Comma-Separated Values (.csv)

CSV (Comma-Separated Values) is the simplest and most universally compatible tabular data format. Each line represents a row, with values separated by commas (or other delimiters like semicolons or tabs). CSV is plain text, making it human-readable, lightweight, and compatible with virtually every application — from Excel and Google Sheets to databases, programming languages, and data analysis tools. CSV does not support formatting, formulas, multiple sheets, or data types — all values are stored as text. It's the standard format for data import/export, ETL pipelines, database exports, API responses, and machine learning datasets. For large datasets, CSV offers simplicity and efficiency, though formats like Parquet or XLSX provide better features for complex data.

Convert to CSV from any format

Choose a source format below to convert to Comma-Separated Values

XLSCSVXLSXCSVODSCSVTSVCSVNUMBERSCSVXLSMCSVXLSBCSV

Frequently Asked Questions

How do I convert files to CSV?
Simply upload your file using the converter above, select CSV as the output format, and click convert. The conversion happens instantly in your browser — no uploads needed.
What file formats can be converted to CSV?
You can convert 7+ formats to CSV, including XLS, XLSX, ODS, TSV, NUMBERS and more. Browse the full list of supported source formats above.
Is converting to CSV free?
Yes, Convert999 is 100% free with no limits. Convert as many files to CSV as you need — no registration, no watermarks, no hidden fees.
Is my data safe when converting to CSV?
Absolutely. All conversions happen locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

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