Chartroom is a full program that runs in your browser and needs JavaScript. Please enable JavaScript, or use its engine as tools without it:
- CSV/Excel Chart Studio – Turn CSV, TSV or Excel data into line, bar, pie, scatter or histogram charts with SVG/PNG export.
- Time-Series Explorer – Resample, smooth and decompose date/value data: trend, R², seasonality, YoY change and anomalies.
- Geo Data Visualizer – Map CSV coordinates or GeoJSON as points, proportional circles, hex-bin heatmaps or choropleths.
- Diagram & Flowchart Maker – Write flowcharts, sequence diagrams and mind maps as text and get a laid-out SVG/PNG diagram.
- Embeddable Chart Builder – Make a self-contained chart to embed anywhere: inline SVG, standalone HTML, accessible snippet.
- Probability & Statistics Studio – Distributions, descriptive stats, confidence intervals and t, chi-square and z tests with p-values.
- DataFresh – Is this dataset or API still fresh? Newest record, update cadence check and schema drift.
- UnitProof Unit Calculator – Unit maths you can audit: dimension check, exact factors and a full derivation tree.
- LocaleKit Country Format Rules – Address form fields, postal-code regex, calling code and date formats for any country.
- Energy Grid Explorer – Generation mix, load, renewable share, cross-border flows and power prices for European grids.
- Public Spending Explorer – Search government contracts and grants: who pays whom, totals per agency and vendor.
- Software Adoption Explorer – Open-source usage signals: weekly downloads, growth and version adoption for npm, PyPI, crates.
- Internet Archive Change Explorer – See how a web page changed in the Wayback Machine: capture timeline plus the changes that matter.
- Satellite Change Explorer – Compare NASA satellite images of any place on two dates: true colour, NDVI, night lights.
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