Clean — by Similarity API
Free CSV & Excel Viewer
View, search, sort and filter CSV or Excel files right in your browser. Nothing is uploaded.
Drop file or browse
CSV, TSV, TXT, XLSX or XLS · opened in your browser
Your data never leaves your browser
How It Works
How to open a CSV file online in 3 steps
Drop your file
Drag a .csv, .tsv or Excel file onto the viewer, or choose it from your computer.
We detect the format
The separator and text encoding are detected automatically, so columns and accents display correctly.
Search, sort & export
Filter any column, sort, hide what you don't need, then download the view as CSV or JSON.
Why Clean
Why Excel and Notepad struggle with CSV files
Excel stops at 1,048,576 rows and often mangles separators and accents. Notepad shows raw text with no columns. Most online viewers upload your file to their servers.
| Excel | Notepad | Other online viewers | Clean | |
|---|---|---|---|---|
| Opens 100k+ rows smoothly | Slow | Slow | Often capped | Yes |
| Detects separator & encoding | Often wrong | No columns | Sometimes | Yes |
| Search & filter every column | Yes | No | Sometimes | Yes |
| File stays on your device | Yes | Yes | Usually uploaded | Yes |
| No install or sign-up | No | Yes | Varies | Yes |
NEED MORE?
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FAQ
Frequently asked questions
Is the CSV viewer free?
Yes. It's completely free with no sign-up, no watermark and no row limit beyond what your browser can hold.
Is my file uploaded anywhere?
No. Your file is read and displayed entirely inside your browser. Nothing is sent to our servers, stored, or used to train AI.
How large a CSV file can I open?
Files with hundreds of thousands of rows open smoothly because only the visible rows are drawn. Files up to roughly 200 MB work in a modern desktop browser.
Does it support Excel, TSV and semicolon-separated files?
Yes. Open .csv, .tsv, .txt, .xlsx and .xls files. The separator (comma, semicolon, tab or pipe) is detected automatically, and Excel workbooks let you pick a sheet.
Why does my CSV look garbled in Excel?
Usually it's the wrong text encoding or separator. Excel often assumes a regional separator and a legacy encoding. This viewer detects UTF-8 and Windows-1252 and the separator automatically, so accents and columns display correctly.
Can I export only the filtered rows?
Yes. Search, filter, sort or hide columns, then download exactly what you see as CSV or JSON, or copy it to your clipboard.