microcharts vs react-sparklines — React sparkline comparison
The 2017-era react-sparklines package against a maintained, accessible, RSC-safe sparkline — measured sizes, dependency and accessibility differences, and an honest note on when the older package is still fine.
react-sparklines put sparklines into thousands of React apps and
still gets massive weekly downloads. It is the package many "react sparkline" searches land on, so if you are choosing
between it and microcharts, this page is the factual side-by-side. It is not a takedown — the package earned its
adoption.
The numbers
| Signal | react-sparklines 1.7.0 | microcharts Sparkline |
|---|---|---|
| Gzip (react external) | 7.9 kB | 3.99 kB static · 6.64 kB interactive |
| Last npm publish | 2017-07-27 | actively maintained |
| Runtime dependencies | prop-types | 0 (React is a peer) |
| Accessible name | none by default (bare <svg>) | role="img" + summary from the data |
| Server Components | class components — need a client boundary | static entry renders in RSC, zero client JS |
react-sparklines gzip via esbuild minify+gzip 2026-07-23; last publish + deps from npm. microcharts from .size-limit.json (CI).
Where the difference actually shows
Maintenance. react-sparklines last published in 2017 (1.7.0). It predates hooks and Server Components — nothing
from that era can be expected to target them. microcharts is actively maintained against React 18 and 19, with
StrictMode-safe rendering tested in CI.
Accessibility. react-sparklines renders a bare <svg> — no role, no <title>, no accessible name; a screen
reader finds nothing. Every microchart is role="img" with a natural-language summary generated from the data
(describeSeries), and interactive entries add keyboard navigation with a polite live region.
Server Components. react-sparklines components are class components, which need a client boundary in an App Router
app. The microcharts default export is hook-free static SVG that renders directly in an RSC with zero client JavaScript.
Scope. microcharts is a word-sized catalog — 106 chart types, one grammar: data alone renders
something correct, and the same prop names mean the same thing on every chart. Sparkline is one entry in it.
react-sparklines is one visual idea with composable overlays.
Size. Both are small. react-sparklines is a single ~7.9 kB gzip package; microcharts charges per chart subpath
(3.99 kB static · 6.64 kB interactive for Sparkline) with a CI gate that keeps every chart inside its budget.
When react-sparklines is still fine
- A legacy codebase already uses it, the charts are decorative, and nothing is broken
- You need its exact composable-overlay API and have your own accessibility layer
No urgency to migrate in those cases. The gaps above matter when accessibility, RSC, or maintenance actually bite.
Migrating
The shapes map directly:
// react-sparklines
import { Sparklines, SparklinesLine } from "react-sparklines";
<Sparklines data={[3, 5, 4, 8, 6, 9]} width={100} height={20}>
<SparklinesLine color="steelblue" />
</Sparklines>;
// microcharts
import { Sparkline } from "@microcharts/react/sparkline";
<Sparkline data={[3, 5, 4, 8, 6, 9]} width={100} height={20} color="steelblue" title="Weekly revenue" />;title gives the chart its accessible subject; the summary is generated from the data. Bars map to
SparkBar, reference lines to <Threshold>.
Next
- React sparklines — the mark itself, in depth
- Sparkline API
- When to use microcharts
- Accessibility
microcharts vs Chart.js for inline charts
Canvas vs SVG for word-sized charts in React — measured bundle sizes, react-chartjs-2 wrapper cost, RSC behavior, and accessibility paths. Chart.js remains the right call for dashboard and report canvases; this page covers only the inline-chart decision.
microcharts vs MUI X Sparkline — bundle size and RSC comparison
MUI X Charts SparkLineChart against a microcharts Sparkline — measured gzip in and outside a MUI app, required peers, Server Component behavior, and accessibility defaults. If you are on MUI and building a dashboard, SparkLineChart is a fine choice.