CSV is a plain-text table format storing rows of comma-separated values. Opened in Excel, Google Sheets and any text editor. CSV has been used since the earliest days of computing but was only formally documented in 2005, as RFC 4180. Despite the name, CSV files often use semicolons or tabs instead of commas, a habit that grew up in regions where the comma is the decimal separator. Because there is no single authority over the format, quoting and line-ending conventions vary between tools, which is why a CSV exported by one program can confuse another. A .CSV file is plain text, so you can open and edit it in any text editor. On the web a .CSV file is served with the MIME type text/csv.

How do I open a .CSV file?

Drop a .CSV file onto Analyser at https://analyser.valjdakosta.com/ and it opens directly in your browser - no upload, no account and no software to install. Open CSV and TSV tables in a full analysis workbench: a virtualised grid with sort, filter, per-column and global search, column show/hide/reorder and column splitting, a group-by summary, and a chart builder (line, bar, scatter, histogram, pie, area, box and heatmap) with PNG/JSON/CSV export.

Can I open a .CSV file online for free?

Yes. Analyser is a free online .CSV opener and viewer that runs entirely in your browser - your .CSV file never leaves your device, so there is nothing to upload and no software to install. It even works offline once installed.

.CSV file - what it is and how to open it online

Analyse a .CSV file

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What is a .CSV file?

CSV is a plain-text table format storing rows of comma-separated values. Opened in Excel, Google Sheets and any text editor.

Did you know: CSV has been used since the earliest days of computing but was only formally documented in 2005, as RFC 4180.
Despite the name, CSV files often use semicolons or tabs instead of commas, a habit that grew up in regions where the comma is the decimal separator.
Because there is no single authority over the format, quoting and line-ending conventions vary between tools, which is why a CSV exported by one program can confuse another.
A .CSV file is plain text, so you can open and edit it in any text editor.
On the web a .CSV file is served with the MIME type text/csv.
What Analyser shows you: Open CSV and TSV tables in a full analysis workbench: a virtualised grid with sort, filter, per-column and global search, column show/hide/reorder and column splitting, a group-by summary, and a chart builder (line, bar, scatter, histogram, pie, area, box and heatmap) with PNG/JSON/CSV export.
Open a .CSV file: Drag a .CSV file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.
Related formats: .TSV. See all supported file types.