CSV Editor Tool
Why Use This Online CSV Editor
Spreadsheet-Style Editing
Edit CSV data in a familiar spreadsheet interface. Click any cell to modify its value, add or remove rows and columns, and rearrange data with drag-and-drop — just like Excel or Google Sheets.
Real-Time Preview
See your changes instantly as you edit. No need to re-upload or refresh the page. The live preview lets you verify every modification before downloading the final CSV file.
100% Browser-Based & Private
All CSV processing happens locally in your browser. Your files are never uploaded to any server, keeping your sensitive data completely private and secure.
No Signup or Installation
Open the page, drop your CSV file, and start editing immediately. No account creation, no software installation, no command-line tools required.
Sort, Filter & Search
Quickly find the data you need with built-in sorting, filtering, and search capabilities. Sort columns ascending or descending, filter rows by value, and search across the entire dataset.
Export & Download
Download your edited CSV file with one click. The output uses standard UTF-8 encoding and comma delimiters for maximum compatibility with Excel, Google Sheets, databases, and other tools.
What Is a CSV File?
CSV (Comma-Separated Values) is one of the most widely used file formats for storing and exchanging tabular data. Each line in a CSV file represents a row, and values within each row are separated by commas (or other delimiters like semicolons or tabs). CSV files can be opened by virtually any spreadsheet application, database, programming language, or data analysis tool.
While CSV files are simple and universal, editing them in a plain text editor can be error-prone — misaligned columns, missing commas, and encoding issues are common. A dedicated CSV editor provides a structured, visual interface that prevents these errors and makes data editing fast and reliable.
Universal Compatibility
CSV is supported by Excel, Google Sheets, LibreOffice, Python, R, SQL databases, and thousands of other tools. It is the de facto standard for data import and export.
Human-Readable Format
Unlike binary formats like Parquet or XLSX, CSV files are plain text and can be opened in any text editor. This makes them easy to inspect, debug, and share.
Lightweight & Simple
CSV files have no formatting overhead — no styles, no formulas, no macros. This simplicity makes them ideal for data transfer between systems and for automated processing pipelines.
How to Edit a CSV File Online
- 1
Upload Your CSV File
Drag and drop a .csv file into the editor above, or click the upload area to select one from your computer. The editor supports CSV files with comma, semicolon, or tab delimiters.
- 2
Edit Your Data
Click any cell to modify its value. Use the toolbar to add or delete rows and columns, sort data, or apply filters. All changes are reflected in real time in the spreadsheet view.
- 3
Review Your Changes
Scroll through the data to verify your edits. Use the search and filter functions to locate specific values and ensure everything looks correct before exporting.
- 4
Download the Edited CSV
Click the download button to export your edited data as a .csv file. The file is saved in UTF-8 encoding with standard comma delimiters, ready to use in any application.
CSV Editing Best Practices
Keep Headers Consistent
Always include a header row with clear, descriptive column names. Avoid spaces and special characters in headers — use underscores or camelCase instead for better compatibility with databases and programming tools.
Watch for Encoding Issues
Use UTF-8 encoding to ensure special characters, accented letters, and non-Latin scripts display correctly across all platforms. This editor exports in UTF-8 by default.
Handle Commas in Values
If your data contains commas, the values should be wrapped in double quotes. This CSV editor handles quoting automatically so you can focus on your data without worrying about formatting.
Back Up Before Editing
Always keep a copy of your original CSV file before making changes. This ensures you can revert to the original data if something goes wrong during editing.
Validate Data Types
Ensure numeric columns contain only numbers and date columns use a consistent format. Mixed data types in a column can cause errors when importing into databases or analysis tools.
Remove Empty Rows and Columns
Clean up your CSV by removing blank rows and unused columns before sharing or importing. Extra whitespace and empty cells can cause unexpected behavior in data processing pipelines.
CSV Editor FAQ
How do I edit a CSV file online?
Simply drag and drop your CSV file into the editor on this page. The file will be parsed and displayed in a spreadsheet-style table where you can click any cell to edit its value, add or delete rows and columns, sort data, and more. When you're done, click download to save the edited CSV file.
Is my CSV data safe when using this online editor?
Yes. This CSV editor runs entirely in your browser. Your file is never uploaded to any server — all parsing, editing, and exporting happens locally on your device. Your data remains completely private.
What is the maximum CSV file size supported?
Since all processing happens in your browser, the maximum file size depends on your device's available memory. Most modern computers and tablets can handle CSV files up to several hundred megabytes without issues.
Can I edit CSV files with different delimiters (semicolons, tabs)?
Yes. The editor automatically detects common delimiters including commas, semicolons, and tabs. You can also manually specify the delimiter if auto-detection doesn't match your file format.
How is this different from editing CSV in Excel?
Unlike Excel, this online CSV editor works directly in your browser with no installation required. It preserves CSV formatting exactly — no automatic date conversion, no formula interpretation, and no encoding changes that Excel sometimes applies. It's purpose-built for clean CSV editing.
Can I add or delete rows and columns?
Yes. You can add new rows at the end or insert them at any position. You can also add new columns, rename column headers, and delete rows or columns you no longer need.
Does the editor support large CSV files with thousands of rows?
Yes. The editor uses virtualized rendering to handle large datasets efficiently. Only the visible rows are rendered at any time, so scrolling through thousands or even hundreds of thousands of rows remains smooth and responsive.
Can I convert CSV to other formats?
This tool focuses on CSV editing and viewing. For format conversion, check out our other free tools: CSV to Parquet converter, CSV to Chart maker, and more — all available in the Kanaries tools suite.
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