CSV Editor & Viewer Online
A browser-based spreadsheet editor to view, edit, search, and export CSV files. Local-first architecture guarantees your data is never uploaded to any server.
Upload CSV File
Select a CSV from your computer to load it into the web spreadsheet grid.
Start with Blank Spreadsheet
Create a new empty grid table to build data from scratch and export.
Spreadsheet Editor Instruction Guide
How to import and view CSV files online
Choose whether to upload an existing CSV document or start fresh with an empty grid. When uploading, you can specify if the first row contains columns titles (headers), and choose to auto-detect the separator delimiter (comma, semicolon, tab, pipe) or input it manually.
Editing data cells and columns
To edit a value, double click any data cell or double click any column header name to rename the column. A text field will appear. When editing, type your new value and click outside or press **Enter** to save the value. Press **Escape** to discard changes. You can also append new rows and columns, or delete selected rows and columns.
Local action history (Undo / Redo)
Unlike basic HTML grids, our spreadsheet comes with a local actions history stack. If you accidentally write a typo, delete a row, or rename a header, simply click the **Undo** arrow key icon in the toolbar. To re-apply the change, click **Redo**.
Frequently Asked Questions (FAQ) – CSV Editor
Can I use this CSV editor online without uploading my files?
Yes. Like all Agnixbit tools, the CSV Editor & Viewer is 100% serverless and local-first. Your files are processed entirely in memory inside your browser. No data is sent to our servers.
How do I add or delete rows and columns?
Once a CSV file is uploaded or an empty sheet is created, use the toolbar at the top. You can click "Add Row" or "Add Column" to expand your spreadsheet, or select a row/column and click the delete button.
What delimiters are supported by this online CSV viewer?
We automatically detect commas, semicolons, tabs, and pipes. When importing or exporting, you can manually set the delimiter.
Is there an undo/redo feature for edits?
Yes, the editor tracks your modifications in a local history queue. You can click "Undo" or "Redo" in the toolbar to revert cell changes, row operations, or column changes.