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.
npx skills add mohitagw15856/pm-claude-skills --skill chart-data-extractor --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Chart Data Extractor Skill Extracts data from images of charts and graphs — bar charts, line charts, pie charts, scatter plots, and tables in images — producing a structured data table that can be used in spreadsheets or rebuilt in any charting tool. Built to leverage Opus 4.7 pixel-level image analysis capabilities. ## Required Inputs Ask the user for these if not provided: - **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 — if the user knows the max/min values to anchor the extraction) ## Output Structure ### 1. Chart Identification | Attribute | Value | |---|---| | Chart type | [Bar / Line / Pie / Scatter / Area / Other] | | Chart title (if visible) | [Title text] | | X-axis label | [Label + unit] | | Y-axis label | [Label + unit] | | Number of series | N | | Legend categories | [List] | | Data period (if time-based) | [Start — End] | ### 2. Extracted Data Table | [X axis] | [Series 1] | [Series 2] | ... | |---|---|---|---| | [Value] | [Value] | [Value] | | ### 3. Con
- Required Inputs
- Output Structure
- 1. Chart Identification
- 2. Extracted Data Table
- 3. Confidence Levels
- 4. Notable Observations
- 5. Reconstructed Source
- 6. Assumptions and Caveats
- 7. Follow-up Options
- Quality Checks
- Anti-Patterns
- Example Trigger Phrases
- Why This Works Better on Opus 4.7
What does the chart-data-extractor skill do?
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.
How do I install it?
Run `npx skills add mohitagw15856/pm-claude-skills --skill chart-data-extractor --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From mohitagw15856/pm-claude-skills, a repository with 1,255 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.