How to use
- Select or drop a .csv file, or paste your CSV text and apply it.
- Choose the delimiter (comma, semicolon or tab) and toggle whether the first row is a header.
- Click any cell to edit its value directly in the table.
- Download your changes as a clean, correctly quoted CSV file.
Frequently asked questions
How do I edit a CSV file online?
Load or paste your CSV, then click any cell in the table and type. Your edits are applied in place, and the Download button re-exports the whole table as clean CSV with fields quoted whenever they contain the delimiter, a quote or a newline.
Which delimiters are supported?
Comma, semicolon and tab. The delimiter is auto-detected from the first row when you load a file, and you can switch it any time from the dropdown to re-parse the same data.
Is my CSV data uploaded anywhere?
No. The file is read, parsed, edited and re-saved entirely in your browser — everything stays local on your device and nothing is ever sent to a server.
Is there a file size limit?
There is no fixed limit. The CSV is parsed and held in memory, so very large files are bounded by your device's available memory. Most everyday CSV files open instantly.
Does it handle quotes, commas and line breaks inside cells?
Yes. Parsing follows RFC-4180-style rules: quoted fields, delimiters and newlines inside quotes, and escaped double-quotes ("") are all handled, and the same fields are re-quoted correctly on download.
Can I convert between delimiters, like semicolon to comma?
Yes. Load a file with one delimiter, then pick a different delimiter for export — the table is re-serialised with your chosen separator, so you can effectively convert a semicolon or tab file to a comma CSV.
About this tool
Free online CSV viewer and editor. Open or paste a CSV, edit cells in a table, switch delimiter, and download clean quoted CSV. 100% in your browser, no uploads.