Raw data to insightin seconds
FastStats is a no-code data science workbench that runs entirely in your browser. Upload a file, wrangle it visually, build publication-quality charts and run real statistics — then export everything.
No account needed to start. Four sample datasets included.
Seven tabs, one workflow
Each tab is a step deeper into your data. Every tab except Report has a genuinely usable free tier.
Overview
Instant profiling: row and column counts, per-column summaries, missing values and automatic type detection.
View
A fast data grid with sort, search and pagination, inline distribution sparklines and a full profile behind every column name.
Insights
Automatic EDA that surfaces strong correlations, group differences, skew, outliers and imbalanced categories — each with a mini chart.
Wrangle
27 stackable transformation steps — filter, mutate, join, append, clip outliers, group, pivot, window functions — saved as a reproducible recipe.
Plot
20 chart types on Plotly.js with point-and-click aesthetics, trend lines, facets, palettes and themes.
Stats
31 analyses from descriptives and t-tests through ANOVA, regression, PCA and k-means — all computed in the browser.
Report
Collect charts, results and Markdown notes into one document, then export it as Markdown or standalone HTML.
An AI assistant that edits your project
Describe a change in plain English and it edits your wrangling pipeline, chart, analysis or report directly — validated against your real columns before anything applies, and every change is undoable.
Bring your own data
Upload or drag & drop CSV, TSV, Excel, JSON and Parquet files, paste text, or load straight from a URL. Export back out as CSV, JSON, Excel, Parquet, a reusable recipe, or a full session file.
See every chart type, test and formatYour data stays on your machine
There is no upload endpoint to trust — which also means FastStats is safe for data you could never paste into a hosted tool.
Nothing is uploaded
Parsing, wrangling, plotting and every statistical test run in your browser with a pure-JS engine.
Works offline
Once the page has loaded there is no server round-trip, so FastStats keeps working with the network off.
No setup, no waiting
No Python environment, no notebook kernel, no account needed to start. Open a file and go.
Free forever for everyday analysis
Pro unlocks every chart type, all 31 analyses, unlimited rows and the report builder for $9.99/year — with a 14-day free trial.