Free Tools
A suite of client-side utilities for reverse-engineering charts. Processing happens locally in your browser; we never upload your data.
Main Plot Digitizer
Upload an image, calibrate axes, and click to extract X/Y coordinates to CSV.
Log-Scale Verifier
Determine if a chart axis is linear (log base 10, natural log) by comparing tick mark pixel distances.
CSV to JSON Formatter
Quickly convert extracted coordinate strings into structured JSON arrays for API use.
Bar Chart Estimator
Input pixel heights and max axis value to instantly generate categorized values.
Error Margin Calculator
Calculate the inherent statistical error in your extraction based on image DPI and axis scale.
Date Axis Parser
Convert linear pixel extraction into actual datetime formats (ISO 8601) for financial charts.
Pie Chart Angle Extractor
Input chord lengths or angles to calculate percentage distributions.
Scatter Density Estimator
Estimate point count in over-plotted regions using pixel color density.
Interpolation Generator
Generate intermediate points (linear/spline) between sparse extracted data points.
Axis Unit Converter
Batch convert extracted data columns (e.g., Celsius to Fahrenheit, lbs to kg) post-extraction.
Image Resolution Checker
Verify if a screenshot has sufficient DPI (target >150) for reliable extraction accuracy.
Series Color Extractor
Extract exact hex codes from multi-line charts to map data series accurately.