Free · No upload · No sign-up · No row limit
Open a CSV file online and read it as a proper table — sort it, search it, fix a cell, export it. Everything happens inside your browser, so your file never leaves your device.
Drop your CSV file here
Also opens .tsv, .tab, .psv and .txt — up to millions of rows.
Parsed in your browser. The file is never uploaded.
or
No rows match that search.
Features
Built to be the fastest way to look at a CSV, not the most featureful spreadsheet.
Your CSV is read from disk and parsed by this tab. Open your browser’s network panel and watch — no request ever carries your data.
Only the rows on screen are drawn, so hundreds of thousands of rows scroll smoothly. Excel stops at 1,048,576.
Paste a link to a .csv, or add ?url= to the address, and the file loads in one click straight from that host.
Commas, semicolons, tabs and pipes are detected from the file itself. European Excel exports and .tsv files just open.
UTF-8, UTF-16 and Windows-1252 are detected from the bytes, so accented characters arrive intact — and the viewer names what it found.
Click a header to sort — numerically for numbers, in natural order for text. Press / to filter every column at once.
Change any value, see exactly what you edited, and revert all of it in one click. Your file on disk is never written to.
Save what is on screen — with your edits, sort order and filter applied — as CSV, TSV, JSON or a Markdown table.
Follows your system by default, with a toggle in the header. Reading a spreadsheet at midnight should not be painful.
How it works
Most online CSV tools ask you to upload your file before you can look at it. A copy of your spreadsheet — customer records, a bank export, a payroll run — then lives on someone else's machine under their retention policy rather than yours. This page does the work in the tab you already have open.
Comparison
| CSV Viewer | Excel | Google Sheets | Upload-based tools | |
|---|---|---|---|---|
| Opens without installing anything | Yes | No | Yes | Yes |
| File stays on your device | Yes | Yes | No | No |
| Sign-up required | No | No | Yes | Sometimes |
| Row limit | Your RAM | 1,048,576 | 10M cells | Often 10k |
| Mangles ZIP codes and long numbers | No | Yes | Yes | Varies |
| Detects semicolons and Windows-1252 | Yes | Partly | Partly | Rarely |
| Works offline | Yes | Yes | No | No |
| Price | Free | Paid | Free | Freemium |
Excel and Sheets are spreadsheets — they are built to change your data. That is exactly the
problem when all you want is to read a CSV: Excel rewrites long order numbers into
scientific notation, strips the leading zero off a ZIP code, and turns SEP-01 into
a date, all without asking. This viewer shows every value exactly as the file stores it.
About
A CSV is plain text: one line per row, a separator between fields, usually the column names on the first line. That simplicity is why every database, CRM, bank and shop platform can export one — and why a CSV file opener should be the least dramatic tool you own. You should be able to double-click a file, see what is in it, and get on with your day.
In practice, opening a CSV is where the trouble starts. Double-clicking it launches a spreadsheet that reformats the data as it loads. The online CSV viewer in the first search result wants an email address and uploads your file to a server in a country you did not choose. And a file bigger than a few megabytes makes both of them crawl.
This tool exists for that gap. It is a free CSV viewer that runs entirely in your browser: no account, no upload, no row cap, no watermark and no paid tier waiting behind the third feature. Open the network panel while you load a file and you will see nothing leave your machine — which is the only claim about privacy that is worth anything.
.csv and has no spreadsheet installed. .csv, .tsv, .tab, .psv and .txt
— anything delimited by commas, semicolons, tabs or pipes. Quoted fields containing commas,
escaped quotes and line breaks are handled correctly, ragged rows are padded rather than
clipped, and the detected separator and encoding are always shown so a wrong guess is visible
rather than silent.
Every way in
There is no second tool and no separate page to find — the viewer at the top of this page does all of it.
Drag the file onto the page or press Browse file. It opens straight from disk: no upload step, no queue, no progress bar for a transfer that is not happening. A 10 MB export is on screen in about the time it takes to read this sentence, and closing the tab is all the cleanup there is.
Switch to From URL and paste a link to a .csv — a
raw.githubusercontent.com file, an S3 object, a published Google Sheet, an API
that returns CSV. Your browser fetches it directly from that host; the request never passes
through this site. You can also link straight to a file by adding
?url= to this page's address, which makes any CSV shareable as a table.
Excel stops at 1,048,576 rows and Google Sheets at 10 million cells. This has no cap of its own — only your device's memory. Only the rows actually on screen exist in the page, so a file with hundreds of thousands of rows sorts, searches and scrolls without the slow repaint that makes a spreadsheet unusable at that size.
No account, no email, no trial that expires, no row cap that appears at 500 rows, no watermark on the export and no feature held back for a paid tier. There is no paid tier. Nothing here is a funnel toward one, which is also why there is nothing to sign up for before you can see your own file.
Export writes out what is on screen — your edits, your sort order, and only the rows matching your search. JSON comes out as an array of objects keyed by your header row, ready to paste into code. CSV and TSV are written with a UTF-8 byte order mark so Excel reads accented characters correctly instead of guessing a codepage. Markdown gives you a table you can drop into a README or a ticket.
In Chrome or Edge, the address bar shows an install icon. Installing it registers the viewer
as a handler for .csv files, so double-clicking one in Finder or File Explorer
opens it here instead of launching a spreadsheet that rewrites your data. Once installed it
works with no connection at all — which is the strongest possible proof that your file is
not being uploaded.
FAQ
Open viewcsvonline.com and drop your .csv file onto the page — it opens as a sortable, searchable table straight away. There is nothing to install, no account to create and no upload: the file is read from your disk by the browser tab you already have open and parsed in memory. You can also click Browse file, paste a link to a CSV, or paste the rows themselves.
Use a browser-based viewer like this one. Excel is not required — and for a CSV it is often the wrong tool anyway, because it silently reformats data: long numbers become scientific notation, leading zeros in ZIP codes and phone numbers are stripped, and text like SEP-01 turns into a date. This viewer shows every value exactly as the file stores it, and never writes back to your original file.
Any modern browser works the same on all three — Chrome, Edge, Safari, Firefox, Brave and Arc are all supported. Drop the .csv onto this page and it opens. On Windows and macOS you can also install the viewer (Chrome and Edge show an install icon in the address bar), after which double-clicking a .csv in File Explorer or Finder can open it directly in the app, fully offline.
This viewer only draws the rows currently on screen, so file size is limited by your device's memory rather than by the page. Files with hundreds of thousands of rows scroll smoothly, and a search or a sort runs over the data in memory rather than re-reading the file. Excel, by comparison, stops at 1,048,576 rows and Google Sheets at 10 million cells. If a very large file does run out of memory, split it first with split -l 500000 big.csv part_ on macOS or Linux.
Open this page in your phone's browser and tap Browse file. Android lets you pick the CSV from Files, Drive or a mail attachment; the table then scrolls both ways with your finger, and column headers stay pinned. You can also add the page to your home screen so it opens like an app and works with no connection.
In Safari, open this page and tap Browse file, then choose Browse to pick the CSV from the Files app, iCloud Drive or an email attachment. To keep it handy, tap the Share button and choose Add to Home Screen — the viewer then launches full-screen like a native app and opens files with no network at all. Nothing is uploaded from your device at any point.
No. The CSV is read and parsed by JavaScript running in your own browser tab and never leaves your device. You can verify this yourself: open your browser's developer tools, switch to the Network panel, and open a file — you will see no request carrying your data. There is no account, no storage and nothing to delete afterwards.
Yes. Switch to the From URL tab and paste a direct link to a .csv, or add ?url= to this page's address — for example viewcsvonline.com/?url=https://example.com/data.csv — to open it in one click. Your browser fetches the file directly from that host; it never passes through us. The host has to allow cross-origin reads, which raw.githubusercontent.com, published Google Sheets and most public S3 buckets do.
Yes. Double-click any cell (or select it and start typing) to change a value. Edited cells are highlighted so you can see exactly what you changed, and Revert all puts every one back to what the file contained. Export then saves what is on screen — your edits, your sort order and only the rows matching your search — as a new CSV, TSV, JSON or Markdown file. Your original file is never modified.
Yes. The separator is detected from the file itself, so European semicolon exports from Excel, tab-separated .tsv files and pipe-delimited data all open without changing a setting. Quoted fields containing commas, escaped quotes and line breaks are parsed correctly, and the detected separator is shown in the status bar.
The character encoding is detected from the bytes, so UTF-8, UTF-16 (both byte orders) and Windows-1252 all open with accents intact — including Excel's default CSV export, which is not UTF-8. When a file is not UTF-8 the viewer names the encoding it found, so a wrong guess is visible rather than silent. Exports are written as UTF-8 with a byte-order mark so Excel reads them back correctly.
Yes — completely free, with no sign-up, no row limit, no watermark and no paid tier. There is nothing to buy and no trial to expire.
Yes. The page is cached the first time you visit, so it opens again with no connection. Install it (Chrome and Edge show an install icon in the address bar; on iPhone use Share → Add to Home Screen) and it behaves like a desktop app — which matters most when the whole point is that your data stays on your machine.
Use Export to download the current table as JSON, TSV or a Markdown table, or copy it to the clipboard. For Excel, export as CSV and open the result — it is written as UTF-8 with a BOM, which is what Excel needs to read accented characters correctly. TSV pastes into Excel and Google Sheets cleanly without any import dialog.
Click a column header to sort by it — click again to reverse, and a third time to return to file order. Numeric columns sort as numbers, and text sorts in natural order so item 2 comes before item 10. Press / to jump to the search box, which filters to rows matching your text across every column at once. Drag the edge of a header to resize a column.
CSV stands for comma-separated values. It is a plain-text format where each line is a row and commas separate the fields, usually with the column names on the first line. Because it is just text, almost every database, analytics tool and spreadsheet can read and write it — which is why exports from banks, CRMs and shop platforms so often arrive as a .csv.
Guides
Every way to open a CSV on Windows, Mac, Linux, Android and iPhone — and which to avoid.
Why Excel quietly corrupts CSV data, and what to use instead.
Opening a file with millions of rows when your spreadsheet gives up.
Opening a .csv attachment on iOS without installing anything.
Reading a .csv on Android or iPhone, straight from Files, Drive or an attachment.
Every guide on opening, reading and fixing CSV files, in one place.