Chart Data Extractor

Extract pixel-level data from an image of a chart or graph and produce a structured data table. Use when asked to extract data from a chart image, transcribe numbers from a graph, digitise a chart, or turn a screenshot of data into a table. Produces a structured table with extracted values, confidence levels, and a reconstructed chart source. Best used with Claude Opus 4.7 or newer for reliable chart data extraction.

Install

npx pm-claude-skills add --agent claude   # or codex · cursor · gemini · hermes
# or one-line MCP (every skill, any client):
claude mcp add pm-skills -- npx -y pm-claude-skills-mcp

What to give it

• The chart image — upload a screenshot or image file
• Chart type — if ambiguous — bar / line / pie / scatter / other
• What matters most — approximate trends / precise values / specific data points / categorisation
• Known axis values (optional) — optional — if the user knows the max/min values to anchor the extraction

Related skills