Fix messy data.
Keep it yours.
Clean CSV files, remove duplicates, convert to JSON, and validate payloads. Everything runs locally in your browser. No account. No file uploads.
The tools you actually need
Built for exports, data preparation, and everyday developer tasks. Paste a sample or choose a local file to start.
Remove Duplicate CSV Rows
Keep the first match and remove repeated records by entire row or a key column.
Open free tool ›Clean CSV Spaces and Blank Rows
Remove accidental spaces and blank records from messy exports while preserving column order.
Open free tool ›CSV to JSON Converter
Turn CSV tables into JSON records for APIs, apps, and code samples.
Open free tool ›JSON Formatter & Validator
Pretty-print JSON or compact it without uploading sensitive payloads.
Open free tool ›Private by default
Processed locally
JavaScript reads and transforms input inside your browser. We do not operate an upload endpoint.
Understand every change
Preview the output, see how many rows were removed, and keep your untouched original file.
Built for useful data
Supports quoted CSV fields, escaped quotes, empty columns, and predictable string-preserving conversion.
How it works
Pick a tool, load a small file or paste text, adjust the options, and download the result. Each page explains the transformations so you can decide what belongs in your workflow.
We focus on practical spreadsheet problems rather than promises of magic AI transformations. By keeping processing on your device, the site reduces unnecessary sharing of customer and operational data.