What file formats are supported?

You can import CSV, TSV and plain text delimited files, and export to CSV, TSV, JSON, Excel (XLSX), HTML, Markdown, XML and SQL insert statements.

CSV Editor Free

Free Online CSV Editor

Open, edit, clean and convert CSV files directly in your browser.

🔒 Your files are processed locally in your browser and are never uploaded.

Drag & drop a CSV, TSV or TXT file here

or click to browse your computer

Supports .csv, .tsv and .txt files

Spreadsheet-style editingUndo & redoFind & replace Data cleaning toolsValidation checksCharts & analysis Export to 8 formatsDark mode

0 / 0 rows 0 cols Saved locally

Clean Data

Rows & columns

Text cleanup

Values

Split column

Merge columns

What is a CSV editor?

A CSV editor is a tool for opening, viewing and modifying comma-separated values files in a spreadsheet-style grid. Instead of installing desktop software, CSV Editor Free lets you edit rows and columns, fix formatting issues and export cleaned data straight from your browser tab.

How to edit a CSV file online

Drag your file into the upload area above, or use Open CSV, Paste CSV, or Create Blank CSV to get started. Once loaded, click any cell to select it, double-click to edit, and use Tab, Enter and the arrow keys to move around — just like a familiar spreadsheet. Use the toolbar to sort, filter, clean and validate your data, then export it in the format you need.

Why use CSV Editor Free?

No installation, account or subscription required
Handles quoted fields, multiline values and Unicode text correctly
Built-in cleaning tools for duplicates, blanks, spacing and formatting
Validation checks that surface empty cells, duplicate rows and mixed data types
Export to CSV, TSV, JSON, Excel, HTML, Markdown, XML or SQL

CSV privacy and security

Every part of the editing process — parsing, editing, cleaning and exporting — runs locally in your browser using JavaScript. Your file is never transmitted to a server, which makes this a safe option for spreadsheets containing sensitive or personal data.

Supported formats

Import CSV, TSV and plain-text delimited files with automatic delimiter detection. Export to CSV, TSV, JSON, Excel (.xlsx), HTML tables, Markdown tables, XML and SQL insert statements, with full control over delimiters, headers and line endings.

Frequently asked questions

Is CSV Editor Free really free?

Yes — there is no signup, watermark or hidden paywall. Every feature on this page is available at no cost.

Are my files uploaded to a server?

No. All processing happens locally in your browser, and your file never leaves your device.

Can I edit a CSV file without Excel?

Yes. The built-in spreadsheet grid, along with sorting, filtering and cleaning tools, covers most everyday spreadsheet tasks without needing Excel or Google Sheets.

What happens if I accidentally close the tab?

Your work is autosaved to your browser's local storage, and you'll be offered the option to restore your session the next time you open the editor.