AI Data-to-Chart Visualizer

Most chart generator tools default to bar charts for everything and let you manually override to line or pie if you want something else — which quietly puts the actual decision on the user, who often doesn't know the rule either. This tool applies the real decision framework instead: bar charts compare values across discrete categories and are the safe default; line charts are reserved for genuine time-series data where the trend over time is the point; pie charts only get used when the values sum to a meaningful whole and there are six or fewer categories, because a pie chart with eight-plus slices or non-additive data is close to unreadable regardless of how it's styled. Given a CSV of quarterly revenue by product line — four categories, additive, summing to total company revenue — the tool correctly picks a pie chart instead of defaulting to bar, and states the one-sentence reasoning behind that choice rather than presenting the chart as if the type were obvious. The output renders as real SVG directly in the page — no chart-image file, no external charting library, crisp at any zoom level — using a small, colorblind-safe categorical palette with a fixed hue order rather than randomly generated series colors. One honest limitation: it caps at 12 data points, aggregating the remainder into an "Other" category, because a chart with 40 unlabeled slivers isn't actually more useful than one with 12 labeled categories. Every bar and pie slice is directly labeled with its value; a line chart labels the endpoint rather than crowding every point, which is the same restraint a human analyst would apply by hand. Built by EngraveOcean as part of a small, growing set of free AI utilities, alongside the AI CSV Summarizer in the same Text & Data category — no login, no daily cap.