What file size can it handle?

Files up to a few MB parse instantly in the browser. Very large files may be slow because all processing is client-side.

Is my CSV data uploaded?

No. CSV parsing and regression run entirely in WebAssembly in a Web Worker - your data never leaves your device.

Upload a CSV to auto-detect column types, spot missing values, and fit a linear regression - all locally in your browser.

1
Upload or paste CSV
Drop a CSV file or paste data directly into the input area.
2
Review column types
The tool auto-classifies each column as Email, URL, Integer, Float, Boolean, Timestamp, Currency, or Text.
3
Fit regression
Select X and Y numeric columns to fit an OLS linear regression and see the R² score.

What file size can it handle?: Files up to a few MB parse instantly in the browser. Very large files may be slow because all processing is client-side.
Is my CSV data uploaded?: No. CSV parsing and regression run entirely in WebAssembly in a Web Worker - your data never leaves your device.

Paste raw log lines and instantly cluster repeated patterns using TF-IDF and DBSCAN - runs 100% in your browser via WebAssembly.

Provide match and non-match string examples; a decision tree learns the pattern and exports it as Rust, JavaScript, or regex.

Format, validate, and minify JSON instantly in your browser. Your data never leaves your device.

Decode JWT tokens and inspect header and payload instantly in your browser. Your tokens never leave your device.

Count words, characters, sentences, and estimate reading time instantly in your browser. No sign-up required.