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ARROW to CSV converter, without the upload.

Turn ARROW datasets into CSV. It is converted in your browser, so the file never leaves your device.

Drop ARROW files here

or choose from your computer paste with Ctrl V

Ready · other file types work too0 bytes uploaded, ever

Convert to

How to convert ARROW to CSV

  1. Add your ARROW datasets

    Drop ARROW (Arrow IPC) files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.

  2. CSV is already chosen

    Press Convert. There is nothing else to set. The work happens in this tab.

  3. Download

    Save the CSV, or download everything as one ZIP if you converted several files.

Why ToAny

  • Private by construction

    The ARROW to CSV converter is part of this page and runs inside your browser. Your datasets are never sent to ToAny or to anyone else.

  • No upload, no queue

    Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.

  • Free, without an account

    No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.

ARROW to CSV: what to expect

Arrow is binary, and spreadsheet programs cannot open it. CSV is plain text that every spreadsheet, database and script can read. ARROW is at home in passing tables between data tools without conversion cost; CSV is the usual choice for moving tabular data between systems.

Arrow IPC files and Feather version 2 files are read, including LZ4 and Zstandard compressed ones. The older Feather version 1 layout is refused with a message saying so.

ARROW vs CSV

ARROW

Apache Arrow table

Arrow files store a table in the same column-wise layout the Arrow library uses in memory, so a program can read the data without parsing it. It is written for speed rather than size. The streaming variant uses the .arrows extension. Feather version 2 is the same file format.

Opens in pandas, Polars, DuckDB, R's arrow package and other analytics tools; not Excel

ARROW converter
CSV

CSV spreadsheet

CSV is a table written as text: one row per line, values separated by commas. Every spreadsheet and database can import and export it, but it holds one sheet only and no formatting, formulas or data types.

Opens in Excel, Google Sheets, Numbers, databases and any text editor

CSV converter
ARROW compared with CSV
ARROWApache Arrow tableCSVCSV spreadsheet
Stands forApache Arrow IPC fileComma-Separated Values
TypeColumnar data filePlain-text table
CompressionNone by default (LZ4 or Zstandard optional)None
Introduced2016, by the Apache Software FoundationThe 1970s, by no single author (described in RFC 4180)
Opens inpandas, Polars, DuckDB, R's arrow package and other analytics tools; not ExcelExcel, Google Sheets, Numbers, databases and any text editor
Best forPassing tables between data tools without conversion costMoving tabular data between systems
File extension.arrow, .arrows.csv

Questions

Are my datasets uploaded anywhere?

No. The ARROW to CSV conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.

Is anything lost when converting ARROW to CSV?

The values are kept. Anything CSV has no way to express, such as formatting, formulas or nesting, is simplified or left out.

Can I convert several ARROW files at once?

Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.

How do I convert ARROW to CSV on Windows, Mac, iPhone or Android?

The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the ARROW file, press Convert and save the CSV. There is nothing to install.

Is there a file size limit?

Yes. Binary data files up to 150 MB are accepted; a larger file is refused with a message. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.