Open CSV files online

Drop a CSV and get a clean, sortable table in under a second — even with millions of rows.

  • .csv
  • .tsv
  • .txt

Drop a CSV file here

CSV, TSV or TXT · or paste with Ctrl V

Opens on your device. Nothing is uploaded.

What it does

Built for this one job

  1. 01

    Fast on huge files

    A 200,000-row file opens in under a second. Parsing runs in a background thread and only visible rows are drawn.

  2. 02

    Separators and encoding detected

    Commas, semicolons, tabs or pipes — and UTF-8, Windows-1251 or Windows-1252 — are picked up automatically.

  3. 03

    Search, sort, export

    Filter across all columns as you type, sort by any column, export the result as CSV or JSON.

  4. 04

    Quotes handled properly

    Values with commas, quotes and line breaks inside them land in the right cell instead of breaking the row.

How it works

Three steps, no account

  1. Step 1

    Drop a .csv, .tsv or .txt file into the box, or click “Choose file”.

  2. Step 2

    Separators and encoding are detected for you.

  3. Step 3

    Sort by any column, search across all of them, export as CSV or JSON.

Good to know

Why CSV files look broken in Excel — and not here

CSV has no official standard for separators or text encoding. Excel in Europe often saves with semicolons, US Excel with commas, and older versions use legacy encodings like Windows-1251. Open the “wrong” combination and everything lands in one column or turns into gibberish.

This viewer looks at the file first: it tries UTF-8 and falls back to the legacy encoding that matches the text, then detects which separator splits the rows consistently. You get a clean table without an import wizard.

Excel also struggles past a million rows. Here the file is parsed off the main thread and only the rows on screen are rendered, so size is limited mostly by your computer’s memory.

FAQ

Questions people ask

Is my file uploaded anywhere?

No. Your browser opens the file on your own device. There is no server that receives it, so there is nothing to store, leak or delete afterwards.

How large a CSV can I open?

Files with millions of rows work on a normal laptop. The practical limit is your device’s memory.

My file uses semicolons or tabs. Does it work?

Yes. Commas, semicolons, tabs and pipes are detected automatically.

Why do I see strange characters in other apps?

The file is probably not UTF-8. This viewer detects Windows-1251 and Windows-1252 automatically; export to CSV here to get a clean UTF-8 copy.

Does it work on a phone?

Yes. It runs in any modern browser on Windows, Mac, Linux, Android and iPhone — there is nothing to install.

Is it actually free? Where is the catch?

No catch: no account, no trial, no watermark and no limit that appears halfway through. The work happens on your computer, so serving you costs us next to nothing.

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