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Spreadsheet Conversion

Convert CSV to OTS Online — Free

Fast, free CSV to OTS converter. No registration required.

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How to Convert

1

Upload your .csv file by dragging it into the upload area or clicking to browse.

2

Choose your output settings. The default settings work great for most files.

3

Click Convert and download your .ots file when it's ready.

What is CSV?

CSV is a simple format for storing tabular data. Each line represents a row, with values separated by commas. It's universally compatible with spreadsheet applications.

Format Details

Full Name
Comma-Separated Values
Extension
.csv

Key Features

  • Simple format
  • Universal
  • Data exchange
  • Lightweight

What is OTS?

OTS is the OpenDocument Format spreadsheet template used by LibreOffice Calc, Apache OpenOffice, and other ODF-compatible applications. It stores cell formatting, formulas, and styles as reusable templates.

Format Details

Full Name
OpenDocument Spreadsheet Template
Extension
.ots

Key Features

  • OpenDocument
  • Spreadsheet template
  • LibreOffice Calc
  • ISO standard

CSV vs OTS

FeatureCSVOTS
Full NameComma-Separated ValuesOpenDocument Spreadsheet Template
Extension.csv.ots
Best ForSimple formatOpenDocument

Frequently Asked Questions

Yes. You can convert up to 5 files per day completely free, with no watermark or registration required. Pro users get unlimited conversions and larger file sizes.
Most files convert in under 30 seconds. Larger files may take 1-3 minutes. Processing runs on our servers, so your device stays fast.
Our converter uses optimized settings to preserve quality. Default settings prioritize quality over file size. You can adjust settings for more control.
Free users can convert files up to 100MB. Pro users can convert files up to 2GB with priority processing.
Yes. Our converter is browser-based and works on any device — iPhone, Android, tablet, or desktop. No app or software installation needed.

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