How can I open a CSV file online without Excel?

Upload your .csv file here and it opens instantly in a table view. You can search, filter, and inspect rows directly in your browser.

Can I convert CSV to JSON after viewing or filtering?

Yes. After you review or filter rows, use Export JSON to download structured JSON from your CSV data.

Is my CSV file uploaded to a server?

No. The viewer reads your file locally using the browser's File API, so your CSV data never leaves your device.

How large a CSV file can the viewer handle?

The viewer processes files entirely in your browser, so practical limits depend on your device's memory. It comfortably handles typical exports with thousands of rows, and the built-in search filters them instantly.

Does the search filter every column?

Yes. The instant search scans values across all columns and shows only the rows that match your query, making it easy to locate specific records.

Open CSV File Online - Free CSV Viewer, Editor & JSON Export

Open and view CSV files online in a searchable table. Edit cells, filter rows, and export CSV to JSON securely in your browser with no upload.

Open and view any CSV file online in a clean, searchable table—no Excel or app install required. Drop in your .csv file and the tool instantly renders every row and column, lets you filter records with live search, and exports the data to structured JSON with one click. All parsing runs locally in your browser, so your files never get uploaded to a server.

Drag & drop CSV file here

or click to browse

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How to Use the CSV Viewer

1. Upload CSV

Drag and drop your CSV file or click to select one from your device.

2. View & Filter

View your data in a clean table. Use the search bar to filter specific rows.

3. Export

Export your filtered data to JSON format for use in your applications.

Key Features

✓Client-Side Processing: Your data never leaves your browser. It's 100% secure and private.
✓Instant Search: Filter through thousands of rows instantly with the built-in search.
✓Responsive Table: View your data comfortably on any device with our optimized table layout.
✓JSON Export: Convert your CSV data to JSON format with a single click.

How to Use the CSV Viewer

1
Upload your CSV
Drag and drop your .csv file onto the drop zone or click to browse and select one from your device.
2
View and filter rows
Your data appears in a clean, responsive table. Use the search bar to filter thousands of rows instantly by any value.
3
Export to JSON
Click Export JSON to download your viewed or filtered data as structured JSON ready for use in your applications.

References

RFC 4180 — Common Format for CSV Files
The IETF memo defining the common CSV format, including field delimiters, quoting, and line-break rules.
RFC 8259 — JSON Data Interchange Format
The IETF specification for the JSON format produced by the tool's Export JSON feature.
MDN — File API
Web API that lets the viewer read your local CSV file in the browser without uploading it to a server.

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Beautify and validate the JSON you export from your CSV data.

Frequently Asked Questions

How can I open a CSV file online without Excel?: Upload your .csv file here and it opens instantly in a table view. You can search, filter, and inspect rows directly in your browser.
Can I convert CSV to JSON after viewing or filtering?: Yes. After you review or filter rows, use Export JSON to download structured JSON from your CSV data.
Is my CSV file uploaded to a server?: No. The viewer reads your file locally using the browser's File API, so your CSV data never leaves your device.
How large a CSV file can the viewer handle?: The viewer processes files entirely in your browser, so practical limits depend on your device's memory. It comfortably handles typical exports with thousands of rows, and the built-in search filters them instantly.
Does the search filter every column?: Yes. The instant search scans values across all columns and shows only the rows that match your query, making it easy to locate specific records.