Charttoolbox
Turn spreadsheet data into clear charts in your browser
Charttoolbox launched on September 2, 2026 with 2 votes, #2,318 of 8,097 launches that month.
What it does
Create heatmaps, pie and donut charts, or bar charts from CSV, Excel, and pasted data. Review field mapping, customize the result, and export PNG or SVG without uploading spreadsheet contents for server-side chart processing.
Use Charttoolbox to create heatmaps from CSV, Excel, or pasted data. Build correlation matrices, customize colors, and export PNG or SVG—free and private.
Use this free heatmap generator to turn CSV, Excel, or pasted data into a clear, customizable heatmap. Create correlation matrices and export publication-ready PNG or SVG files—all in your browser. Start with your own spreadsheet or explore a ready-made example. Smart defaults adapt the same flexible heatmap workspace to reports, research, and exploratory analysis. Compare performance across teams, regions, products, or time periods—and export a clean visual for your next deck. Calculate a Pearson correlation matrix automatically and export sharp SVG figures for papers and presentations. Pivot categorical data, inspect patterns and outliers, and tune the scale without writing chart code.…from charttoolbox.com
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