Data Visualization Toolkit
Data visualization professionals transform raw numbers into compelling visual stories. Whether you are building dashboards in Tableau, creating D3.js visualizations, or designing reports in Looker, you constantly need to convert colors, format data, and prepare assets. These free, browser-based tools handle the supporting tasks so you can focus on making data beautiful and understandable.
Color Converter
Convert colors between HEX, RGB, HSL, and other formats instantly. Match brand guidelines to chart palettes, translate Figma design tokens to D3.js color scales, and verify accessibility contrast ratios.
JSON Formatter & Validator
Pretty-print JSON data feeds that power your visualizations. Validate the structure of API responses, Vega-Lite specs, and D3.js data files before rendering. The formatted view reveals data shape issues that break charts.
Code to Image
Turn D3.js, Python, or R visualization code into clean, shareable images for presentations, blog posts, and documentation. Syntax-highlighted snippets look professional in slide decks.
JSON to YAML Converter
Convert JSON chart configurations to YAML for dashboard-as-code workflows, Grafana provisioning, and CI/CD-managed visualization deployments.
Code Diff Tool
Compare chart configurations, dashboard exports, and visualization code before and after changes. Essential for reviewing updates to shared dashboards and catching unintended modifications.
RegExp Tester
Build regex patterns for data label formatting, axis tick customization, and text extraction from datasets. Test patterns before embedding them in visualization code.
JS Beautifier
Unminify D3.js code, Observable notebooks, or embedded chart scripts. When you inherit someone else's visualization code, this tool makes it readable again in seconds.
Timestamp Converter
Convert Unix epoch timestamps to human-readable dates for time-series chart axis labels. Debug timezone issues in temporal visualizations across different locales.
Base64 Encoder / Decoder
Encode images as Base64 for embedding in SVG visualizations, data URIs in CSS backgrounds, or inline chart assets. Decode Base64-encoded data from APIs before visualization.
QR Code Generator
Generate QR codes linking to interactive dashboards, published reports, or data portals. Perfect for printed reports, conference posters, and executive summaries that link to live data.
Character Counter
Check label lengths for chart axes, legend entries, and tooltip text. Ensure text fits within the visual space constraints of your chart layout.
Duplicate Line Remover
Clean up data labels, category lists, and dimension values before feeding them into visualizations. Duplicate entries create confusing chart legends and incorrect aggregations.