Drag-and-drop a messy CSV or JSON file. Instantly dedupe, fix formatting, normalize dates, and export clean data. No servers. No sign-ups. Your data never leaves your browser.
From import to export, DataClean gives you powerful tools to transform messy data into clean, structured output.
Drop CSV, TSV, or JSON files directly into your browser. Or paste data from any spreadsheet. Smart parsing auto-detects delimiters and column types.
Automatically finds blank rows, duplicates, inconsistent formatting, mixed date formats, and extra whitespace. See all issues at a glance.
Remove blank rows, dedupe, trim whitespace, normalize casing, fix dates — all with a single click. Or fix everything at once with Fix All.
Composite quality score with 4 dimensions: completeness, consistency, accuracy, and uniqueness. Print or save as PDF.
Split columns, merge columns, rename headers, reorder, change data types, fill blank values. Full control over your data structure.
Download as CSV (always free), TSV, JSON, or Excel. Or push the cleaned data straight into VizFlow for instant visualization.
Full undo/redo for all cleaning operations. Use buttons or keyboard shortcuts (Ctrl+Z / Ctrl+Shift+Z). Up to 50 states in history.
Compress your entire dataset and cleaning history into a shareable URL. One click to copy. No server needed.
Generate Python/Pandas code for your cleaning pipeline. Copy and run in Jupyter notebooks or scripts. Pro feature.
No sign-up, no downloads, no learning curve. Just drop your data and go.
Drag and drop a CSV, TSV, or JSON file. Paste from a spreadsheet. Or try one of our sample datasets to explore.
See all issues detected. Click to fix them one-by-one or all at once. Preview changes before applying.
Download your cleaned file as CSV, TSV, JSON, or Excel — or click Open in VizFlow to see your data come alive as a chart.
Common data issues that DataClean detects and fixes automatically.
DataClean runs entirely in your browser. No data is ever sent to any server. No cookies, no personal data collection, no tracking. Just pure, private data cleaning. We use Plausible Analytics — a privacy-first, GDPR-compliant analytics tool that uses no cookies and collects no personal data.
Start free. Upgrade when you need unlimited rows, Pro-only operations, and Excel export. No hidden fees, cancel anytime.
Everything you need to clean data. No credit card required.
For power users who need unlimited rows, advanced operations, and Excel export.
30-day money-back guarantee · Cancel anytime
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