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Online CSV Viewer

View any CSV file clean, searchable table — instantly. 100% browser-local processing. Your data never leaves your device.

Upload File

Click or drag a CSV file here

Supports .csv and .txt files

File Statistics

Rows: -
Columns: -
File Size: -

Data Preview

Upload a CSV file to preview the data

Drag & drop a file or click to select

How to Use the Online CSV Viewer

1

Upload Your CSV

Click the upload area or drag and drop your CSV file directly onto the page. Any .csv or text file is accepted.

2

Configure Options

Choose your file's delimiter (comma, tab, semicolon, etc.) and encoding (UTF-8, GBK, etc.) to prevent garbled characters.

3

View Your Data

Click "View CSV" and your data is instantly displayed clean, sortable table with row numbers and highlighted headers.

4

Search & Export

Use the search box to filter rows in real time. Browse large files with pagination and export the data back to CSV when done.

Key Features of Our CSV Viewer

  • 100% Private & Secure: All processing happens entirely in your browser using the native File API. No data is ever sent to a server, making it safe for sensitive, confidential, or proprietary data.
  • Drag & Drop Upload: Simply drag your CSV file from your desktop or file manager directly into the upload zone. No clicking through menus required.
  • Multi-Encoding Support: Handles UTF-8, GBK, GB2312, Big5, ISO-8859-1 and more. Switch encodings on the fly to eliminate garbled characters from any locale's CSV files.
  • Auto Delimiter Detection: Automatically identifies comma, tab, semicolon, and pipe delimiters, or manually specify the one your file uses.
  • Real-Time Search & Filter: Instantly filter rows by any keyword. Matching cells are highlighted for easy identification, even across thousands of rows.
  • Data Statistics: See total row count, column count, and file size at a glance to quickly understand the scale of your dataset.
  • Large File Pagination: Handle massive CSV files with configurable pagination (50, 100, 200, or 500 rows per page). No browser freezing, regardless of file size.
  • Completely Free: No sign-up, no subscription, no watermarks. Open the page and start viewing — forever free.

What is a CSV File?

CSV stands for Comma-Separated Values. It is a plain-text file format used to store tabular data (numbers and text) in a straightforward, universally readable structure. Each line in a CSV file represents one data record (row), and each record consists of one or more fields (columns) separated by a delimiter — most commonly a comma.

CSV is one of the most widely used data interchange formats in the world. Virtually every spreadsheet application (Microsoft Excel, Google Sheets, LibreOffice Calc), database system, and data analysis tool supports reading and writing CSV files. This universal compatibility makes CSV the go-to format for moving data between different systems.

Common uses for CSV files include: exporting database records, saving financial transaction data, exchanging user information lists, storing scientific measurement results, managing e-commerce product catalogs and order histories, and sharing datasets for data science and machine learning projects.

Frequently Asked Questions

Absolutely. This tool uses the browser's native File API and JavaScript to process your data entirely on your local machine. No data is ever transmitted over the internet, and nothing is stored on any server. You can safely view files containing confidential business data, personal information, or trade secrets.

Garbled characters (mojibake) happen when the file's actual encoding doesn't match what the viewer expects. In the left panel, try switching the File Encoding option:
• Chinese characters garbled: Try GBK or GB2312
• Traditional Chinese: Try Big5
• Western European: Try ISO-8859-1
You can also open the file in Excel, then "Save As" with UTF-8 encoding and re-upload.

The actual limit depends on your device's available RAM. In practice, files up to 50MB are handled smoothly on most devices. For very large datasets with hundreds of thousands of rows, use the pagination feature (set to 500 rows per page) for the best performance. For files over 100MB, consider splitting them first.

After loading your file, a Search box appears in the top right of the preview area. Start typing any keyword and the table will instantly filter to show only matching rows, with the search term highlighted in yellow. This works across all columns simultaneously, no matter how many rows your file has.

CSV is a simple plain-text format that stores only raw data values — no formatting, no formulas, no charts. It's universally compatible but limited in features. Excel (.xlsx) is a rich binary format supporting multiple sheets, formulas, styling, charts, images, and much more, but requires specific software to open properly. Use CSV for maximum compatibility when exchanging data between systems. Need to view an Excel file? Try our Online Excel Viewer.

Common Use Cases

Database Exports

Instantly preview records exported from MySQL, PostgreSQL, MongoDB, or any other database without installing database tools.

Data Science

Quickly inspect CSV output from Python pandas, R scripts, or machine learning pipelines to verify data processing results.

E-commerce

View product catalogs, order histories, customer lists, and inventory data exported from Shopify, WooCommerce, or Amazon Seller Central.

Finance & Banking

Easily view bank statements, transaction histories, and accounting reports exported files — all without leaving your browser.