Turn CSV spreadsheets into ARROW. It is converted in your browser, so the file never leaves your device.
Drop CSV files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop CSV 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.
Press Convert. There is nothing else to set. The work happens in this tab.
Save the result. When one file produces several ARROW files they come as a single ZIP.
The CSV to ARROW converter is part of this page and runs inside your browser. Your spreadsheets are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
CSV carries no formatting, formulas or multiple sheets, and Excel often misreads its dates and encodings. Arrow is typed and quick for analytics tools to load. CSV is at home in moving tabular data between systems; ARROW is the usual choice for passing tables between data tools without conversion cost.
One CSV can produce several ARROW files; when it does, they are offered together as a ZIP download.
Each column gets one type chosen from all of its values: a column is numeric only if every non-empty cell is a number, and anything mixed, or a value such as a ZIP code with a leading zero, stays text. A workbook with several sheets gives one file per sheet.
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 converterArrow 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| CSVCSV spreadsheet | ARROWApache Arrow table | |
|---|---|---|
| Stands for | Comma-Separated Values | Apache Arrow IPC file |
| Type | Plain-text table | Columnar data file |
| Compression | None | None by default (LZ4 or Zstandard optional) |
| Introduced | The 1970s, by no single author (described in RFC 4180) | 2016, by the Apache Software Foundation |
| Opens in | Excel, Google Sheets, Numbers, databases and any text editor | pandas, Polars, DuckDB, R's arrow package and other analytics tools; not Excel |
| Best for | Moving tabular data between systems | Passing tables between data tools without conversion cost |
| File extension | .csv | .arrow, .arrows |
No. The CSV to ARROW conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
The values are kept. Anything ARROW has no way to express, such as formatting, formulas or nesting, is simplified or left out.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
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 CSV file, press Convert and save the ARROW. There is nothing to install.
Yes. Data files up to 300 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.