CSV Editor
Edit spreadsheet-like CSV data in a grid. Add rows or columns, then download — all offline in the tab.
Drop a file or paste below
Edit cells, then download CSV
How to use this tool
Load CSV
Paste or drop a .csv file.
Edit cells
Change values, add rows, or add columns.
Download
Export the edited CSV locally.
Quick edits without a spreadsheet app
Fix a header typo, add a column, or clean junk rows, then export CSV again. Ideal for small-to-medium tables.
Grid and source stay in sync
Cell edits update the underlying CSV text so what you download matches what you see.
Privacy for customer lists
Contact exports and internal reports never need to leave the machine when you only need a small cleanup.
Frequently Asked Questions
More on quality loss: conversion quality guides · compression guides
Is my file uploaded?
No. Format Convertly tools run in your browser tab. Files are not sent to our servers for processing.
Is this tool free?
Yes. Use it without an account or watermark.
Does it work on mobile?
Yes — any modern phone or desktop browser that supports the required Web APIs.
Is there a row limit?
Very large files may slow the browser tab. For huge datasets, prefer a desktop spreadsheet or scripted ETL.
Ready to convert more formats?
Browse converters or jump back to the tool above.