A toolbox for data preparation and preprocessing
dataprep.jp is a collection of browser-based tools for cleaning, transforming, extracting, and preparing data before visualization or analysis.
- Works entirely in the browser
- No installation or environment setup
- Handles character encoding, PDFs, GeoJSON, coordinates, and geospatial data
- Uses the same account system as the visualization tools on
dataviz.jp
What you can do
Prepare tables and text data
Fix character encodings, extract text, and prepare CSV/TSV data before analysis or visualization.
Extract tables from PDFs
Turn selected regions in reports, public documents, and other PDFs into table data.
Transform geospatial data
Work with GeoJSON, coordinate conversion, geospatial joins, and map-oriented data preparation.
Prepare data before visualization
Shape your data before opening it in visualization tools. Used together with dataviz.jp, the workflow from preparation to visualization stays in the browser.