Chart Toolkit
How to use
What it does
A set of chart tools rendered in pure SVG, covering both common and more specialised types: bar, pie and line charts for everyday data, a decision matrix for scoring options by weighted criteria, an A/B sample-size calculator for estimating how much traffic an experiment needs, radar charts for multi-dimensional comparison, and heatmaps, box plots, candlestick and bubble charts for more specific analysis.
How to use it
Pick the chart type from the tabs, then fill in values row by row in the data table (you can paste straight from a spreadsheet) and the chart redraws live. The panel on the right adjusts colours, axis ranges, legend position and value labels, and the export button saves as SVG or PNG. All rendering is local, so your data stays on the page.
FAQ
Does the data I paste get uploaded?
No — all charts are rendered locally in the browser and the data never leaves the page, so pasting sensitive spreadsheet content is fine.
What export formats are available?
SVG and PNG. SVG scales without loss and suits documents or web pages; PNG is more convenient for pasting straight into chats or slides.
I am not sure which chart type fits — any guidance?
Use bar, line or pie charts for everyday comparison and trends, radar for multi-dimensional comparison, box plots for distributions, candlesticks for price movement, and heatmaps or bubbles when several variables appear at once. The decision matrix and A/B sample-size tools are calculators, not charts.
Related articles
More tools
Convert HTML/JSX, build clip-path, glassmorphism and neumorphism styles.
Cheat sheets for shell, vim, tmux, systemd, Docker, K8s, nginx, git and more.
JSON formatter, LOC counter, TODO extractor, JSDoc comment generator, complexity estimator and code card, plus key-code, Unicode, URL-params, favicon and OG-image helpers.
Lot drawing, I Ching coin casting, daily tarot draw, Guandi lots, coin-flip decisions, dream dictionary and a fun fortune teller.
Flashcards, kana chart, stroke counts, idiom chain, poem fill-in and brain teasers.
Love match, horoscope, coin decision, habit/water/ledger/todo trackers, vCard/iCal, username/avatar/placeholder generators and more.