CSV Editor
Edit CSV files interactively. Paste CSV or upload a file, edit in a spreadsheet view, then download.
Edit CSV Files Directly in Your Browser — No Excel Required
Excel is overkill for quick CSV edits — it reformat dates, changes number precision and adds BOM characters that break CSV parsers. Our CSV Editor loads any CSV file into a clean spreadsheet view, lets you add/remove rows and columns, edit any cell and export clean CSV without Excel's reformatting issues. Perfect for editing data files before API import, fixing export errors and quick data cleanup.
Frequently Asked Questions
How to edit a CSV file without Excel? ▼
Use our online CSV Editor — upload your file, edit cells directly in the browser grid, add or remove rows/columns, then export back to CSV. The output is clean UTF-8 CSV without Excel's date formatting or numeric precision issues. Also works with TSV and pipe-delimited files.
Why does Excel corrupt CSV files? ▼
Excel auto-formats data on open: leading zeros in phone numbers (0123456789 → 123456789), long numbers in scientific notation (1234567890123 → 1.23457E+12), dates auto-converted to US format (01-02-2024 → Feb 1, 2024 regardless of locale). Use our editor to avoid these transformations.
How to add a column to a CSV file without Excel? ▼
In our CSV Editor: click "+ Col" to add a new column at the end, or use our editor to manually add a header and fill values. For programmatic bulk column addition: awk -F"," "{print $0",new_value"}" data.csv or Python: df["new_col"] = "value"; df.to_csv("output.csv", index=False).
How to merge two CSV files with the same columns? ▼
Our editor handles single files. To merge two CSVs: (1) Load the first CSV, (2) Copy the data rows from the second CSV (not headers) and paste below. In code: cat file1.csv file2.csv > merged.csv (Unix) or in Python: pd.concat([pd.read_csv("a.csv"), pd.read_csv("b.csv")]).to_csv("merged.csv", index=False).