About Free Data Science Tools
The data analyzer is free, needs no sign-up and runs in your browser, so your dataset is never uploaded. Paste CSV or tab-separated text, or open a .csv, .tsv or .txt file of up to 20 MB, and it profiles every column: type, missing values, unique values, statistics and distribution.
It also builds a Pearson correlation matrix of the numeric columns and a filterable, sortable preview of the rows. It cannot open .xlsx workbooks, but a range copied from Excel can be pasted, since it arrives as tab-separated text. The pages for the CSV analyzer, CSV viewer, correlation matrix, data profiling and Excel paste route each open the matching view.
It is a read-only first look: it shows you what is in the file so you can decide what to clean or model next. It does not edit data, fill gaps or run models.
Frequently asked questions
Is it really free?
Yes. There is no price, no trial and no credit card. Ulkaa Tool does the work with your own device, so there is no server bill to pass on to you.
Do I need an account?
No. There is no sign-up and no login. Open the page and use it. An Ulkaa account is not needed for anything on this tool.
Does it run in my browser?
Yes. Your data are processed by code running in your browser tab, on your own device.
Is my data uploaded?
No. Your data are never sent to Ulkaa or to anyone else. You can check this yourself by watching the Network tab in your browser developer tools while you use the tool.
What file formats can I open?
CSV, TSV and plain text files with delimited columns and a header row, up to 20 MB. You can also paste text. Excel workbooks (.xlsx) cannot be opened, but a range copied from Excel can be pasted.
How are missing values handled?
Empty cells and markers such as NA, N/A, NaN, null and a dash count as missing. They are skipped in the statistics and in each pairwise correlation.
Does it work with Excel data?
Yes, by pasting. Select the cells in Excel including the header row, copy and paste. The tab delimiter is detected automatically.