Squoosh

Squoosh is Google's free browser-based image compression app — compress images in WebP, AVIF, MozJPEG, and other formats with visual quality comparison, running entirely in the browser without uploading files to a server.

What Makes Squoosh Stand Out

Free with no file size limits or account required. Side-by-side before/after comparison shows quality impact

Supports modern formats including WebP, AVIF, and JPEG XL

Pricing and Plans

Squoosh is free and open-source — you can use it without any licensing cost, audit the code, and self-host it for complete data control.

Who Should Use Squoosh

Squoosh is best for teams and individuals who need image optimization capabilities and where free with no file size limits or account required. It may not be the right fit when single image at a time — no batch processing.

Verdict

Squoosh delivers on its core promise as a image optimization tool. Squoosh is Google's free browser-based image compression app — compress images in WebP, AVIF, MozJPE... For teams evaluating image optimization options, Squoosh is worth considering based on its specific strengths and how they align with your requirements.

Squoosh Compression Algorithms

Squoosh supports modern formats including WebP, AVIF, and OxiPNG alongside traditional JPEG and PNG compression — enabling side-by-side comparison of different compression algorithms and settings before choosing the best quality-to-size tradeoff.

Squoosh vs. TinyPNG vs. ImageOptim

TinyPNG is the API-accessible service for bulk compression. ImageOptim is the Mac desktop app. Squoosh is the browser-based visual compressor — the best choice when you want to see exactly what compression does to quality before saving, and when AVIF or WebP conversion is the goal.

Overall rating: 4.3 / 5

Squoosh is Google's free browser-based image compression tool — enabling side-by-side comparison of original and compressed images at different settings, with support for WebP, AVIF, MozJPEG, OxiPNG, and other modern formats, all processed locally in the browser without uploading files to a server.

In-Browser Processing and Privacy

Squoosh processes all images locally using WebAssembly — images never leave the browser, providing complete privacy for sensitive content. Corporate design teams working with unreleased product images, photographers editing client portraits, and healthcare applications compressing medical images can all use Squoosh without concern about images being processed on external servers.

The WebAssembly implementation also enables processing at near-native speed: Squoosh's compression codecs run with performance comparable to desktop applications rather than the slowness associated with earlier browser-based processing.

Before/After Quality Comparison

Squoosh's split-view comparison slider shows the original image alongside the compressed version at the exact quality setting selected — enabling visual quality assessment before committing to a compression level. Unlike batch compression that applies settings without visual review, Squoosh's interactive comparison catches over-compression that introduces visible artifacts before any export.

This visual feedback loop is Squoosh's primary advantage over automated compression tools: seeing compression quality rather than trusting percentage reduction numbers enables informed decisions about the quality/size trade-off for each specific image.

Format Conversion

Squoosh converts between image formats alongside compression: PNG to WebP, JPEG to AVIF, or any combination. WebP provides 25-35% smaller files than JPEG at equivalent quality; AVIF provides even greater reduction for browsers supporting it. Squoosh's format comparison enables measuring the actual size difference for a specific image before deciding which format to deploy.

Overall rating: 4.3 / 5