What is CSV Viewer?

Need to view and edit your CSV (Comma-Separated Values) files in a clean, interactive table? CSV Viewer takes your CSV data and displays it as an editable HTML table you can actually work with. Perfect for quick data analysis, editing, and filtering without opening Excel or other spreadsheet software.

CSV is one of the most common formats for data exchange, used everywhere from data exports to API responses. According to RFC 4180, CSV files are simple text files where each line represents a data record. The viewer follows those rules: quoted fields can hold commas, doubled quotes and line breaks, and comma, semicolon, tab or pipe delimiters are picked up automatically.

The best part? Everything runs in your browser. Your data never touches our servers unless you explicitly share it. It's fast, free, and private.

What Makes This Tool Different

Interactive Table View

See your CSV as a clean table with one column per header. Much easier to read than raw comma-separated text, especially past ten columns.

Column Filtering

Filter rows by any column value. Instantly find the data you need without scrolling through thousands of rows.

Inline Editing

Edit cells directly in the table. Double-click any cell to edit, then save your changes. Perfect for quick data corrections.

Export Options

Export your data as CSV or JSON. Download your edited data in the format you need for your project.

File Upload

Hit Upload and pick a .csv file instead of copy-pasting. Your browser reads it locally with the FileReader API; nothing is sent anywhere.

Column Management

In Edit mode, remove columns you don't need. The column is deleted from the CSV in the editor too, so Download gives you the trimmed file.

How It Works

Paste or Upload CSV

Paste your CSV data into the left editor, or click "Upload" to load a file. You can also click "Sample" to see an example. Comma, semicolon, tab and pipe separated files all work.

View and Filter

Your CSV appears as an interactive table on the right. Use the filter boxes in the header row to filter by any column. Double-click cells to edit them directly.

Export Your Data

Click "CSV" to download your edited data as CSV, or "JSON" to export as JSON. Your processed data is ready to use in your project.

When You'd Actually Use This

Data Analysis

Quickly analyze CSV exports from databases or APIs. Filter and view data without opening heavy spreadsheet software. Perfect for quick data exploration.

Data Cleaning

Clean up CSV files before importing into databases or other systems. Edit cells, remove columns, and filter out unwanted rows. Perfect for data preparation.

Development

View CSV test data during development. Quickly check API responses or database exports without leaving your browser. Perfect for debugging.

Format Conversion

Convert CSV to JSON for use in web applications. Export your CSV data in the format your project needs. Perfect for data transformation workflows.

Common Questions

Is my CSV data stored?

Nope. Parsing, filtering and editing all happen in your browser, and the page makes no network request with your data. Close the tab and it's gone.

What CSV formats are supported?

Plain text/csv files with comma, semicolon, tab or pipe delimiters, detected from the first rows. The first row is always used as the header. Quoted values with commas, doubled quotes ("") and line breaks inside them are kept as one cell. If a row has too many or too few fields, or a quote never closes, a warning above the table names the line.

Can I edit the CSV data?

Yes. Click Edit, then double-click a cell to change it and press Enter. Each edit is written back into the CSV on the left right away, and the other cells keep their original text, so `49.50` doesn't quietly turn into `49.5`.

How do I filter data?

Type in the filter boxes in the table header row. Each column has its own filter – type to show only rows matching that value.

Does it work with large CSV files?

Up to a point. Every row is drawn as a table row, so a few thousand rows feel instant and tens of thousands get sluggish on a laptop. For files in the hundreds of MB, a streaming tool like DuckDB or csvkit is the better fit.

Can I export to JSON?

Yes. Click JSON to download an array of objects keyed by the header row. Plain numbers become numbers and true/false become booleans, but values like `00123`, `+15551234567` or a 19-digit order ID stay strings, so nothing changes on the way out.

Other CSV Tools You Might Need

Viewing is just one CSV task. Here are other tools that work well together: