Squoosh vs StackImage: which private compressor?

Squoosh is a Chrome Labs project. It runs codecs in WebAssembly in your tab: mozjpeg, oxipng, WebP, AVIF, and more, with side-by-side quality sliders. Files stay local. If your job is “make this one hero as small as possible,” Squoosh is the tool we tell people to open. We are not going to pretend otherwise.

Where they differ

• Squoosh: one image, deep codec control, comparison view. The gold standard for encode nerding.
• StackImage: 18 tools, batches up to 24, ZIP download, HEIC in, crop, watermark, remove background, upscale.
• Encoders: Squoosh ships mozjpeg / oxipng / tunable AVIF. StackImage uses the browser’s built-in codecs via toBlob. Simpler, usually larger files.
• Enhance: Squoosh is not a background-removal or Real-ESRGAN app. We are, with honest caps.
• Locales: StackImage has English, Spanish, and Portuguese tool URLs.

A practical split

1. Crop or resize the original in StackImage so you are not encoding spare pixels.
2. If the destination is a CDN and every kilobyte matters, finish in Squoosh.
3. If the destination is email or a CMS, finish in Compress Image and stop.

Sources