Free Online CSV Viewer

Open, view, search, and inspect CSV files online directly in your browser.

Drop your CSV file here

or click to browse from your computer

CSV, TSV, XLSX, TXT• Private in-browser processing

Private by Design — Your CSV Stays on Your Device

OnlineCSV processes your files entirely client-side using browser JavaScript. Your CSV contents are never uploaded to any server, database, or remote service.

No account requiredWorks offlineZero data transmission

How to Use CSV Viewer

Upload or Paste CSV

Drag and drop your .csv file or paste CSV raw text directly into the viewer.

Inspect & Search Data

Search rows, sort columns, toggle visible fields, and view row counts.

Export or Copy

Copy filtered data or download your parsed CSV file.

Example Transformation

Example CSV Input

name,email,role,created_at
Alice,alice@example.com,Admin,2026-01-15
Bob,bob@example.com,User,2026-02-01

Frequently Asked Questions

Is my CSV file uploaded to OnlineCSV.com?

No. OnlineCSV parses and displays your file entirely inside your web browser using JavaScript. Your file content never leaves your device.

Can I view large CSV files?

Yes! Our viewer utilizes high-performance virtualized rendering and Web Workers so datasets with tens of thousands of rows remain smooth.

What delimiters are supported?

OnlineCSV auto-detects commas, tabs, semicolons, and pipe (|) characters.

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