[evangow]

I haven't used it, but I believe JIMP might work for you if you're looking for a JS solution to image manipulation

https://github.com/oliver-moran/jimp

[h1d]

For images, you'd want to use a more performant 'sharp'.

https://github.com/lovell/sharp

Benchmark

https://sharp.pixelplumbing.com/en/stable/performance/