CSV Viewer / Editor

A spreadsheet app is overkill for a small export or a header typo. This online CSV viewer opens the file as a clean tabular grid so you can read, scan, and fix data in seconds, then export the corrected CSV when you are done.

What this CSV viewer does

Drop a .csv file and it is parsed into a sortable, scrollable table directly in the page. Each value lands in its own cell, the first row can be treated as a header, and you can edit any cell inline, rename column headers, append new rows, or delete rows you no longer need. When the table looks right, export it back to a standard comma-separated file. There is no sign-up, no install, and no row limit imposed by a paywall.

Common use cases

• Quick inspection — open a CSV export from a database, CRM, or analytics tool just to read it, without launching Excel or Numbers.
• Small corrections — fix a typo in a header, patch a wrong value, or remove a stray blank row before re-importing the file.
• Sanity-checking delimiters and quoting — confirm that fields containing commas or line breaks were quoted correctly and that the column count is consistent.
• Sharing-safe review — view a CSV that contains customer emails, invoices, or other sensitive rows without uploading it to a random web service.

How CSV parsing works

CSV looks simple but the format has real rules. Fields are separated by a delimiter (a comma by default, though tabs and semicolons are common), and any field that itself contains the delimiter, a double quote, or a newline must be wrapped in double quotes. A literal double quote inside a quoted field is escaped by doubling it (""). This viewer follows those quoting rules when it parses the file, so a value like "Smith, John" stays in one cell instead of splitting into two columns. If your data uses tabs instead of commas, convert it first with the TSV to CSV converter.

Privacy: nothing is uploaded

Every step runs locally. The CSV is read into memory and parsed by a Rust module compiled to WebAssembly that executes inside your own browser tab, so the file is never transmitted to a server, never logged, and never stored. That is the core difference between this tool and most online CSV viewers, which upload your file to process it. Here, you can close the tab and the data is gone.

FAQ

Is this online CSV viewer free? Yes, and there is no account or upload required.

Can it handle large CSV files? It works well for typical exports. Because everything runs in the browser, very large files are bounded by your device memory rather than a server limit.

Can I convert the data to JSON? Yes. Use the CSV to JSON converter to turn rows into structured records, or the JSON to CSV converter to go the other way.