Drag-and-drop a messy CSV or JSON file. Instantly dedupe, fix formatting, normalize dates, and export clean data — then send it straight to VizFlow for instant visualization. No sign-up required.
Free forever · Pro from $19 lifetime · Built by Sidequest Labs
Drop CSV, TSV, or JSON files directly. No upload to any server — everything stays in your browser.
Automatically finds blank rows, duplicates, inconsistent formatting, mixed date formats, and extra whitespace.
Remove blank rows, dedupe, trim whitespace, normalize casing, fix dates — all with a single click.
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.
Download as CSV (always free), TSV, JSON, or Excel. Or push the cleaned data straight into VizFlow to visualize.
Drag a messy CSV, TSV, or JSON file onto the upload area. Or paste data directly.
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.
Start free. Upgrade when you need unlimited rows, Pro-only operations, and Excel export.
| Feature | Free | Pro |
|---|---|---|
| Row count per dataset | Up to 100 rows | Unlimited |
| Core cleaning (blanks, dedupe, trim, casing) | ✓ | ✓ |
| Column operations (split, merge, rename, fill, type) | ✓ | ✓ |
| Find & Replace (exact) | ✓ | ✓ |
| Find & Replace (regex with capture groups) | — | ✓ |
| Conditional Transform (if → then) | — | ✓ |
| Custom Cleaning Rules (DSL) | — | ✓ |
| Remove Outliers (IQR / Z-score) | — | ✓ |
| Pivot / Reshape | — | ✓ |
| Merge with File (SQL-style Join, 4 types) | — | ✓ |
| Batch Processing (apply pipeline to N files) | — | ✓ |
| Save & manage Pipelines + Template Gallery (11 templates) | — | ✓ |
| Data Profiling Dashboard | — | ✓ |
| Share via URL + Embed code | — | ✓ |
| Custom Themes / Branding (7 palettes + hex picker) | — | ✓ |
| Open in VizFlow (clean → visualize in one click) | ✓ | ✓ |
| Export — CSV | ✓ | ✓ |
| Export — TSV, JSON, Excel (.xlsx) | — | ✓ |
| Support the project | — | ✓ Lifetime updates |
$19 one-time
$4.99/mo · billed yearly
Both plans include the same Pro license key, sent to your email after checkout. Already have a key? Open the app and click Pro in the header.
DataClean + VizFlow — a clean → visualize pipeline that stays 100% client-side.
You’re here. Drop messy CSV/JSON, instantly clean, dedupe, reformat, and export. Then one-click send to VizFlow.
Already on DataCleanInstantly visualize CSV/JSON as bar, line, pie, scatter, bubble, area, and heatmap charts. No setup, no sign-up.
Open VizFlow →Same Sidequest Labs Pro license unlocks both apps. One subscription, two tools.
DataClean runs entirely in your browser. No data is ever sent to any server. Your files never leave your machine — period.
Built by Sidequest Labs — a small studio building privacy-first, client-side data tools.