Outlier Finder

See which rows are unusual, not just how many: pick the numeric columns, choose the rule, and export the flagged rows. Nothing is uploaded.

Your data never leaves this browser

The file is parsed, previewed and charted on your own device. Nothing is uploaded — not even a sample. Close the tab and the data is gone.

Or paste table text
Import a file to get started. Everything runs locally.

How it works

  1. 1.Import the table (Excel, CSV, TSV or JSON, or paste) and tick one to three numeric columns to check.
  2. 2.Pick a label column so the flagged rows are recognisable, then choose the method (IQR or Z-score) and the sensitivity.
  3. 3.Press Find the outliers: every flagged row comes with the columns it tripped and the normal range of each checked column.
  4. 4.Export the flagged rows as CSV, or as a two-sheet Excel file with the ranges. Unusual is not the same as wrong.

Frequently asked questions

Do I get free credits to try Outlier Finder?
Yes — new accounts get 3 free credits to spend on any tool, Outlier Finder included. After that you only pay for what you run.
How many credits does Outlier Finder cost?
Everything runs in your browser and nothing is uploaded: free accounts pay 1 credit per run, and Pro or Pro+ members run it as often as they like.
Is the content I paste private?
Outlier Finder uses your input only to generate the result. Stored results are deleted automatically by our retention policy, and you can remove any run from your history.
Do I need to install anything?
No. Outlier Finder works in any modern browser — nothing to download or install.