Open CSV files online
CSV and TSV are plain-text tables where each line is a row and values are separated by commas or tabs — the lingua franca of data export.
Drop a CSV file to open it
or click to choose — everything stays on your device
Choose file🔒 100% private — files never leave your browser
You can also edit CSV online — change the content with find & replace, then save it back. Nothing is uploaded. Or turn CSV into an image — snapshot the preview, add arrows or notes, and download a PNG.
What is a CSV file?
CSV and TSV are plain-text tables where each line is a row and values are separated by commas or tabs — the lingua franca of data export. The .CSV extension identifies a Comma-Separated Values file, which is served with the text/csv media type. You can open it here instantly — drop the file into the box above and it renders in your browser. Nothing is uploaded.
Besides this free online viewer, you can open CSV / TSV files in desktop apps such as Microsoft Excel, Google Sheets, any text editor — but here all you need is a web browser.
Quick facts
| Format | CSV / TSV — Comma-Separated Values |
|---|---|
| File extensions | .csv .tsv |
| MIME type | text/csv |
| Developer | IBM (c. 1972) |
| Category | Office documents |
| Also opens in | Microsoft Excel, Google Sheets, any text editor |
How to open a CSV file online
- Click Choose file above, or drag your CSV file onto the box.
- The right viewer loads automatically and renders your file.
- Read, scroll or page through it. To open a different file, choose Open another file.
100% private — files never leave your browser.
Libraries used to render CSV in the browser
This viewer is built entirely with open-source JavaScript that runs in your browser:
Frequently asked questions
What is a .CSV file?
A .CSV file is a Comma-Separated Values, identified by the text/csv media type. You can open and read it instantly in the viewer above without installing anything.
What programs open CSV files?
On the desktop, CSV files typically open in Microsoft Excel, Google Sheets, any text editor. Online, this page opens them in any modern browser — nothing to download.
Can I edit a CSV file online?
Yes. Open your file, switch to Edit, change the text with built-in find & replace, then click Save. It all runs in your browser — nothing is uploaded.
How do I convert CSV to an image?
Use Snapshot to capture the CSV preview, optionally add arrows, text or highlights, then download it as a PNG image.
Is it safe to open my CSV file here?
Yes. The file is read and rendered entirely by JavaScript inside your own browser. It is never uploaded to a server, so nothing leaves your device.
Do I need to install anything to view a CSV file?
No. There is nothing to install and no account to create. Open the page, drop your file, and it displays instantly.
Does it work on my phone or iPad?
Yes. The viewer is fully responsive and works in modern mobile and tablet browsers such as Safari and Chrome.
Is there a file size limit?
There is no hard limit, but very large files depend on your device’s memory. Big files are processed in the background so the page stays responsive.