# CleanChart

CleanChart (cleanchart.app) is a free online chart maker that turns messy CSV and Excel data (including Google Sheets exports) into publication-ready charts in minutes — no formulas, no coding, no setup required. Uploads are sent over HTTPS, processed in memory, and discarded immediately — no stored copy of your rows, and no hosted copy of your chart unless you explicitly request a download link (then the chart image only is kept for 24 hours).

## What CleanChart Does

Upload a spreadsheet or paste data, choose a chart type, customize title and axes, and export a high-quality PNG. Built-in data cleaning automatically handles missing values, duplicate rows, inconsistent formatting, and type mismatches before charting. Charts use Seaborn-inspired aesthetics and are suitable for academic papers, business reports, presentations, and publications.

## Who It Is For

- Students writing theses, reports, or research papers who need professional charts fast
- Analysts and researchers who want clean visuals without learning Python or R
- Marketers and business professionals creating charts for reports and presentations
- Anyone frustrated by Excel's manual formatting or Google Sheets' limited chart types

## Supported Input Formats

CSV, TSV, TXT, Excel (.xlsx, .xls), OpenDocument (.ods), JSON, XML, YAML (.yaml, .yml), Markdown tables; up to 2 MB per file. Google Sheets: download the sheet as CSV or .xlsx (File → Download), then upload it. There is no direct Google Sheets connection.

## Chart Types (29 total)

Alluvial (Sankey-style flow diagram), Area Chart, Bar Chart, Box Plot, Bubble Chart, Bullet Chart, Candlestick Chart, Chord Diagram, Combo Chart, Donut Chart, Funnel Chart, Gantt Chart, Gauge Chart, Grouped Bar Chart, Heatmap, Histogram, Line Chart, Network Graph, Pareto Chart, Pie Chart, Radar Chart (also called Spider Chart), Scatter Plot, Stacked Bar Chart, Step Chart, Timeline, Treemap, Venn Diagram, Violin Plot, Waterfall Chart

## Key Differentiators

- Privacy-first: uploads are processed in memory and discarded immediately — no stored copy of your rows; a chart image is hosted only on explicit request (24h download link), never by default
- Built-in data cleaning: auto-detects and fixes common data issues before charting
- 29 chart types, including types Excel and Google Sheets have no built-in chart for (Sankey-style alluvial, Gantt, bullet, chord and network diagrams)
- Publication-ready output: suitable for academic journals, theses, and professional reports
- No learning curve: from upload to exported chart in under 5 minutes
- Pay-per-use pricing: no forced monthly subscription

## Free Tools

CleanChart offers 28+ free browser-based data tools including: CSV to JSON, JSON to CSV, JSON Formatter, XML to JSON, Excel to CSV, CSV to Excel, TSV to CSV, CSV Duplicate Remover, Date Format Converter, JSON to YAML, YAML to JSON, CSV to SQL, CSV to Markdown, CSV to HTML, and more. All tools run in the browser with no data upload.
Full list: cleanchart.app/tools

## Pricing

- Free: unlimited charts, no account needed; downloads are watermarked PNGs at reduced resolution
- This chart only: $0.99 one-time (one clean, high-resolution chart, no account needed)
- 24-Hour Pass: $4.99 one-time (unlimited clean exports for 24 hours)
- Unlimited: $9.99/month (unlimited clean exports, cancel anytime)

Paid exports are watermark-free, high-resolution PNG or SVG. Prices in USD: https://cleanchart.app/pricing

## MCP Server (for AI assistants)

CleanChart provides a remote MCP server so AI assistants (Claude, ChatGPT, Cursor, and any MCP-capable client) can generate charts directly in a conversation: list chart types, validate configs, detect and fix data issues, and render publication-ready PNG charts. Free tier requires no account (watermarked output); errors are machine-readable so assistants can fix data problems like unsupported date formats automatically.

- Endpoint (Streamable HTTP): https://www.cleanchart.app/api/mcp
- Setup guide: https://cleanchart.app/mcp
- Tools: list_chart_types, validate_chart_config, detect_data_issues, apply_data_fixes, generate_chart, get_entitlements, create_checkout, claim_chart
- Watermark-free rendering: with an API key (dashboard) on a subscription/day pass, or via an in-chat single-chart purchase (create_checkout → pay in browser → claim_chart)

## Key URLs

- Homepage: https://cleanchart.app
- Chart maker: https://cleanchart.app/chart/new
- All chart types: https://cleanchart.app/charts/
- Free tools: https://cleanchart.app/tools
- Blog (data visualization guides): https://cleanchart.app/blog
- Pricing: https://cleanchart.app/pricing
- MCP setup: https://cleanchart.app/mcp

## Contact

Website: https://cleanchart.app