📊 Chart Digitizer HIGH-RES Simple Mode
High-fidelity extraction with 30-50+ points per line • Preserves kinks, curves, and close scatter points • Enhanced resolution processing
⚙️ Analysis Settings
🎯 High-Resolution Mode: This version extracts 2-5x more data points than standard mode.
Point Density: Higher density captures curves, kinks, and irregularities. Ultra mode extracts every visible detail.
Coordinate Precision: More decimals = finer position accuracy. Use 3-4 decimals for technical charts.
Image Upscaling: Larger images give Claude more pixels to analyze. Auto mode upscales small images to 1920px width.
💡 Tip: Start with "High" density + 3 decimals + Auto upscale. Increase to Ultra only if you need maximum detail (costs more tokens).
📝 Prompt Library (Click to expand)
• ✨ "Universal" - Works for ALL chart types (bar, line, scatter, pie) - RECOMMENDED
• "Sequential Multi-Line" - For complex multi-line charts only
• "Grid-Heavy" - For technical diagrams with dense grids
• "Scatter Plot" - For scatter/point charts only
• View/edit any prompt below, or create your own
How Prompts Work: All chart types (bar, line, scatter, pie) use the SAME prompt. The prompt instructs Claude to:
• Identify the chart type automatically
• Extract data in the appropriate format
• Return structured JSON
Prompt Selection: Choose a prompt based on chart type and complexity:
• Simple Mode: Clean charts with distinct colors/labels
• Complex Mode: Dense grids, same-color lines, nomographs
• Sequential Multi-Line: Traces each line separately for accuracy
• Grid-Heavy with Annotations: 🔥 BEST for technical charts - aggressively filters out grid/annotation lines
• Scatter Plot: For scatter plots with multiple colored point series and legends
Custom Prompts: Save your own versions with unique names. All versions stored locally in your browser.
🔑 API Configuration
Your API key is stored in your browser only (localStorage) — never sent to any server other than Anthropic directly. Get your key at console.anthropic.com.
📤 Upload or Select Chart
Drag & drop an image here
or click to browse, or paste from clipboard (Ctrl+V)