Newsletter writers
Move from a reported finding to a chart that remains readable, sourced, and self-contained inside an email.
Free data visualization toolsMake the analytical decision
Make the analytical decision
before the chart.
Free, browser-based tools for newsletter writers, data journalists, researchers, and analysts. Choose the right visual, transform data transparently, then carry the result into a sourced, publication-ready chart.
No account requiredRuns in your browserBuilt for publishing
The toolkit
Useful before the editor opens.
01
Chart Type Chooser
Turn the point you want to make into a recommended chart format, required data shape, publishing canvas, and editable starting point.
- ✓Story-first recommendation
- ✓Newsletter, social, slide, and report advice
- ✓Matching editable template
Best for planning a data storyOpen free tool →
02Index to 100 Calculator
Paste spreadsheet data, rebase multiple series to a common period, preview relative performance, and download the indexed CSV.
- ✓CSV and spreadsheet paste
- ✓Any shared base period
- ✓Indexed chart preview and download
Best for market, audience, and economic comparisonsOpen free tool →
03Chart Source-Line Builder
Turn dataset provenance into a concise on-chart source, a full citation, and a separate methodology note.
- ✓FRED, World Bank, filing, and survey patterns
- ✓Short and full citation formats
- ✓Copy-ready method note
Best for sourced editorial chartsOpen free tool →
04Chart Accessibility Checker
Test chart contrast and review titles, labels, non-color cues, alt text, data alternatives, and source visibility.
- ✓Text and graphical contrast
- ✓Editorial accessibility checklist
- ✓Prioritized fixes without false certification
Best for publication preflightOpen free tool →
Built for repeat publishers
A clearer path from question to published visual.
Generic chart makers begin with colors and templates. These tools begin with the decisions that determine whether the finished chart is valid, legible, and useful to your audience.
Data journalists
Validate the comparison and transformation before visual polish makes the result feel finished.
Researchers and analysts
Use transparent formulas and data-shape guidance without giving up reproducibility or methodological context.
Lean content teams
Create one verified analytical base that can continue into social, slide, report, and web exports.
How it connects
Free analysis first. Publishing controls when you need them.
Use the tools without creating an account. When the result is ready to become an asset, continue into Charted with the recommendation or transformed data intact.
- 01
Decide
Name the reader’s question and choose a visual that matches the data relationship.
- 02
Validate
Check the baseline, units, data shape, source, and caveats before styling.
- 03
Publish
Add titles, annotations, source notes, branding, and layouts for each channel.
Need the reasoning too?
Use the in-depth guides as your editorial playbook.
Decision tables, worked examples, formulas, sourcing templates, common mistakes, and pre-publish checklists.