You have a CSV file and just want to open and read it, without a spreadsheet program and without sending it to a server.
This opener reads a local file in your browser, or takes pasted CSV, detects the delimiter, and shows the data as a table you can scan.
How to use Online CSV Opener
- Open a .csv file with the file button, or paste CSV into the left panel.
- Use the header toggle to treat the first row as headers.
- Read the table, and copy or download the normalized CSV if needed.
What you can do with it
- Open a downloaded CSV to inspect it quickly.
- Check the headers and rows of an export.
- View a CSV on a device without spreadsheet software.
Good to know
Opening a CSV locally does not require any backend; the FileReader API reads the file on your device. You can also drag a file onto the input, and the preview shows the first few hundred rows.
Frequently asked questions
Do I need to upload the file?
No. The file is opened locally in your browser with the FileReader API and never leaves your device.
Can I paste CSV instead of opening a file?
Yes. Paste CSV into the input and it is parsed and shown as a table just the same.
How large a file can I open?
As large as your browser memory allows; a notice appears for very large inputs and the preview is capped for speed.