Dataset Cleaner - Free Online Tool | PivaBox

Clean and normalize JSON/JSONL datasets for AI training — remove duplicates, normalize whitespace, strip HTML tags, standardize dates, and more

How to Use Dataset Cleaner

1. Paste your JSON array or JSONL data into the input field and click Parse Data to analyze the dataset
2. Select the cleaning operations you want to apply — remove duplicates, normalize whitespace, strip HTML tags, standardize dates, trim fields, or filter by field value
3. Click Apply Operations to process the data, then preview the results in the table and download as JSON or JSONL

Frequently Asked Questions

Is Dataset Cleaner free?

Yes, PivaBox Dataset Cleaner is completely free to use. All data processing runs locally in your browser — your data never leaves your device.

What data formats are supported?

The tool supports JSON arrays and JSONL format (one JSON object per line). Both formats are commonly used for AI training datasets and data exchange.

Are my datasets uploaded to a server?

No. All parsing, cleaning, and processing happens entirely in your browser. Your datasets remain private and never leave your device. This makes it safe for sensitive or proprietary training data.