Dataset Inspector
Load a CSV, TSV or JSON array. Preview rows, identify missing values, infer data types and spot exact duplicate records.
Inspect a dataset ↗A small, independent toolkit · Open betaYour data,
Your data,
made usable.
In minutes.
Clean up messy CSVs, inspect column quality, and convert between CSV and JSON. No installation, no sign-up, and no need to upload your working files to a server.
✓ Works locally in your browser✓ No accounts✓ Free to use
customer-report.csvDATASET OVERVIEW ◦
1,284ROWS
12COLUMNS
36MISSING CELLS
customer_idcompanyregionstatus
1001Acme SuppliesNorthActive
1002Northport StudioWestActive
1003Greenway CoSouthTrial
1004Harbour WorksEastActive
Type detection · completeness · duplicate checks
CSV inspection✦JSON conversion✦Quality checks✦Local-first
The toolkitPractical data prep,
Practical data prep,
without the complexity.
Built for developers, analysts and small teams working with exports, fixtures and operational datasets.
Data Cleanup
Trim whitespace, remove completely empty rows, deduplicate repeated records and standardise header names before export.
Clean a file ↗Format Converter
Convert between CSV and JSON, format or validate JSON text and produce reusable outputs without installing a package.
Use JSON tools ↗A simpler processFrom messy export
From messy export
to useful file.
Your data stays on your device throughout processing. No background jobs, external analytics or remote dataset storage.
3 MBMaximum file
10kData rows
0Accounts
01
Bring your dataset
Paste text, upload CSV/TSV/JSON, or try our built-in sample.
02
Inspect and clean
Review completeness and types; choose the transformations you need.
03
Export and keep working
Download a cleaned CSV, TSV or JSON file and carry on anywhere.
Product direction
Designed to grow carefully.
What works today and what we're evaluating next. We distinguish released functionality from ideas.
Available · v0.1
Inspection & conversion
Browser-based parsing, column profiling, cleaning, CSV/TSV/JSON export and JSON formatting.
Exploring
Validation rules
Optional column constraints, data-quality checklists and reusable local presets.
Exploring
AI-assisted workflows
Potential Claude-powered schema explanations and transformation suggestions, with clear consent and cost controls.
Ready when you are
Launch Workbench ↗Clean up your next dataset.
No setup, no account, no subscription.