📊 DataStore Free Data Tools

FreeDataStore

Browser-based data tools for data scientists. Profile, clean, validate, and convert datasets — powered by DuckDB-WASM. Your data never leaves your machine.

11 Tools 100+ Datasets Cataloged DuckDB-WASM TensorFlow.js scikit-learn 100% Private
Take the Tour Browse Tools GitHub
🔍

Profiling

Drop a file, get instant stats. Row counts, types, distributions, nulls, outliers, duplicates. Like pandas.describe() but in your browser.

🧹

Cleaning

Fix messy data. Remove duplicates, trim whitespace, fill nulls, cast types, rename columns. Apply rules, preview changes, export clean data.

✅

Validation

Define schemas, validate datasets against them. Required fields, type checks, range constraints, regex patterns, allowed values. CI-grade reports.

🔄

Conversion

Convert between CSV, JSON, Parquet, and SQL. Preview before exporting. Handle large files without uploading anything to a server.

🧠

ML Training

Train neural networks, image classifiers, and time series models in your browser. Auto-ML picks the best algorithm. All via TensorFlow.js and scikit-learn.

📈

Exploration

SQL-powered dataset explorer. Filter, sort, search, chart — query any file up to 500MB with DuckDB SQL directly in the browser.

🤝

Community

Contribute tools, clean public datasets, earn reputation. Build your portfolio as a data professional. Pro marketplace coming soon.

Your data never leaves your browser

Every tool runs entirely on your device via DuckDB-WASM and WebWorkers. No uploads, no server processing, no tracking. Files are processed in-memory and discarded when you close the tab. The source code is MIT-licensed and open for audit.

Tools

📊
Data Profiler
Drop a CSV/JSON/Parquet — instant stats, distributions, data quality
profiling DuckDB
Open
🧹
Data Cleaner
Remove duplicates, fix nulls, trim whitespace, cast types
cleaning DuckDB
Open
✅
Schema Validator
Define expected schema, validate any dataset against it
validation DuckDB
Open
🔄
Format Converter
CSV ↔ JSON ↔ Parquet ↔ SQL — convert any data format
conversion DuckDB
Open
📈
Dataset Explorer
SQL-powered visual filter, sort, search, chart any file
exploration DuckDB
Open
🧠
Neural Net Trainer
Build layers, train on CSV, see live loss chart, export model
TensorFlow.js training
Open
🖼️
Image Classifier
Drag images into classes, train via MobileNet transfer learning
TensorFlow.js vision
Open
⚡
Auto-ML
Upload CSV, pick target — auto-trains 5 models, picks the best
scikit-learn Pyodide
Open
🔮
Clustering Explorer
KMeans, DBSCAN, Agglomerative — 2D scatter + silhouette score
scikit-learn visualization
Open
📉
Time Series Forecaster
Train LSTM on your time series, forecast the future
TensorFlow.js LSTM
Open
🎮
Model Playground
Load any TF.js or ONNX model, test with live input
TF.js ONNX
Open
📚
Knowledge Base
100+ free datasets, ML models, browser training guides
datasets models guides
Open