CSV Viewer
Open a CSV and read it as a proper table — search every column, sort by clicking a header, page through as many rows as your machine can hold. The file opens inside this browser tab and is never uploaded.
How to open a CSV file
- Choose your CSV file, or drag it onto the box below.
- Search any text to filter rows, and click a column header to sort.
- Page through the rows, or download the filtered view as a new CSV.
Why not just open it in Excel?
You can, and for a quick look it is fine. The catch is that Excel rewrites values as it reads them: zip codes lose their leading zeros, long account and card numbers turn into scientific notation, and codes like 3-10 become dates. It also stops at 1,048,576 rows and truncates the rest without saying so — which is the most dangerous of the failures, because the file looks like it opened correctly. This viewer shows exactly what is in the file, with no type guessing and no row ceiling.
Reading a CSV without changing it
Searching and sorting only affect what is on screen; the file on your disk is untouched. Column headers show the detected type on hover, so you can see at a glance whether a column is being treated as text or numbers. Empty cells are drawn as a dash so a genuine blank is distinguishable from a space.
Background
For what the format actually stores and why exports so often arrive mangled, see what a CSV file is. This page is one of the free CSV converter tools — all of them run in your browser and none of them upload your file.
Questions
How do I open a CSV file?
A CSV is plain text, so any text editor will open it — but you will see raw commas rather than a table. To read it as a table, drop it into the viewer above and it renders as rows and columns in your browser. Excel, Google Sheets, Numbers and LibreOffice Calc will also open one, though Excel changes values as it reads: leading zeros disappear and long numbers become scientific notation. The viewer shows what the file actually contains.
Is my file uploaded to a server?
No. The file is read and rendered inside your own browser tab. Nothing is sent anywhere, stored or logged, which also means there is no upload size limit imposed by us.
Can it open large CSV files?
Yes. Parsing, searching and sorting all happen in a background worker, so the page stays responsive, and only 50 rows are drawn at a time rather than the whole file. The practical limit is your own machine’s memory rather than an upload cap or a row ceiling. Excel, by comparison, stops at 1,048,576 rows and silently truncates anything longer.
Why does my CSV look like one long column elsewhere?
Because the program reading it assumed the wrong separator — usually it expected commas and the file uses semicolons, which is common in European exports. The viewer detects the separator from the file itself, so it renders correctly either way.
Does searching change my file?
No. Searching and sorting only affect what is displayed. The original file on your disk is never modified. If you want to keep a filtered subset, use "Download view as CSV" and a new file is created, leaving the original alone.