Open-source JavaScript library for rendering heatmap overlays from point data on a canvas.
Found via: StackScope Discovery (Indie) 3 · StackScope Wider Web 3
heatmap.js has been detected on 6 launches since first appearing in August 2026. Most recent detection: Manna, today.
It's most commonly paired with Google Fonts, jsDelivr, and HTTP/3.
Share of new sites using heatmap.js
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
Javascript Library leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
|
14.36% | 34.49% |
| #2 | – |
|
6.75% | 16.22% |
| #3 | – |
|
6.64% | 15.94% |
| #4 | – |
|
4.24% | 10.19% |
| #5 | – |
|
3.63% | 8.72% |
| … | ||||
| #798 |
|
<0.01% | <0.01% | |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Javascript Library tool. All 1110 in Javascript Library →
Recent launches we can show
3 of the 6 sites using heatmap.js are product launches we list individually. The other 3 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works
The StackScope API serves all 6 sites using heatmap.js, filterable and exportable, from £15 a month.