Fabricated Number Detector
Runs the digit-level tests auditors use to catch made-up numbers. Humans are terrible random number generators: they overuse "random-looking" digits like 7, avoid doubles like 44, land on round endings too often and repeat favourite patterns. Paste a column of expense amounts, lab measurements or survey responses and get a χ² test of last-digit uniformity, a second-digit Benford check, a repeated-digit test, a round-number test and a duplicate scan — with a plain-language verdict for each.
Runs 100% in your browser — your files never leave your device.
Read the full guide to this tool
Notes
- Last-digit uniformity is the workhorse: in genuinely measured data with enough precision, final digits are nearly uniform, while invented numbers rarely are.
- Tests need material: below ~50 numbers only gross fabrication shows up. The verdicts state how much power you have.
- A failed test is a lead, not a conviction — rounded prices, quantized instruments and psychological pricing (9.99) all break digit uniformity for honest reasons. For first-digit analysis, see the Benford's Law Checker.
- Runs 100% in your browser — your files and data never leave your device.
Explore the idea
Related tools
Auto Analyst: Instant Statistical Report
Drop a CSV or Excel file and get a statistician’s report: data problems, distributions, every real relationship, key drivers and Simpson’s paradox warnings, in plain English.
CSV Viewer & Editor
View, edit, sort, filter and extract columns from CSV files.
CSV ↔ JSON Converter
Convert CSV to JSON and JSON back to CSV.
Data Visualizer
29 chart types — heatmap, treemap, dumbbell, slope, candlestick — with rich styling and annotations.
Excel → CSV Converter
Convert XLSX/XLS sheets to clean CSV, per sheet.
JSON Table Viewer
Paste JSON, get a sortable, searchable table.