Squoosh

Verified🏆 Editor's Choice

Client-side WebAssembly image compression & format converter by Google Chrome Labs

Image & MediaImage Compression★ 4.8 (890 reviews)

Advanced client-side image compression reducing PNG, JPEG, WebP, and AVIF file sizes up to 80% with side-by-side split-screen inspection and zero server uploads.

🔒 https://squoosh.appOfficial Site ↗

Homepage Preview

Squoosh (squoosh.app) official homepage screenshot

📸 Live interface snapshot of Squoosh (squoosh.app)Open Interactive App ↗

Editorial Overview

What is Squoosh?

Squoosh is an open-source, browser-based image optimization application engineered by Google Chrome Labs. Powered by WebAssembly (Wasm), Squoosh compiles industry-leading image codecs—including MozJPEG, WebP v2, AVIF, and OxiPNG—directly into your browser tab. Every image you drop into Squoosh is compressed locally on your device's CPU without ever uploading a single byte to an external server.

You can access the platform directly via the official Squoosh official website (squoosh.app), where you can start immediately without registering an account across Web-based.

Squoosh Benefits & Disadvantages

An objective breakdown of where Squoosh excels and what limitations to keep in mind.

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Key Benefits & Strengths

Why creators & developers choose Squoosh

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Zero Server Uploads (Strict Confidentiality)
Because compression runs via local WebAssembly, confidential client mockups and private photos never touch a third-party cloud server.
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Best-in-Class Compression Ratios
Routine 70%–93% file size reductions using fine-tuned MozJPEG and AVIF encoders that dramatically improve Core Web Vitals (LCP).
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Instant Launch with Zero Sign-Up
Open squoosh.app, paste an image from your clipboard (Cmd+V), and download the optimized file in under 3 seconds.

Disadvantages & Trade-offs

Limitations to consider before adopting

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Single-Image Processing in the Web UI
Squoosh is designed for precision tuning of individual images rather than bulk drag-and-drop batch processing of 100 files at once.
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AVIF Encoding Can Be CPU-Intensive on High-Res Files
Encoding 4K+ images into AVIF at high effort levels runs in browser Web Workers and can take several seconds on older laptops.

Core Features & Capabilities

Standout technical capabilities included in Squoosh.

1Real-Time Split-Screen Pixel Comparison

Drag the interactive vertical divider across zoomed-in pixels to compare your uncompressed original against the target codec in real time.

2Next-Gen WebAssembly Codecs

Encode and transcode between AVIF, WebP, MozJPEG, OxiPNG, Browser PNG, and JPEG XL with granular chroma subsampling controls.

3100% Client-Side Privacy & Offline PWA

Images never leave your computer. Install Squoosh as a Progressive Web App (PWA) to compress assets completely offline on airplanes.

4Built-in Resize & Color Palette Quantization

Downscale high-DPI retina screenshots using Lanczos3 resampling and reduce color palettes before encoding for maximum byte savings.

How to Get Started with Squoosh

1Step 1

Drop or Paste Any Image

Drag a PNG, JPG, or WebP file onto squoosh.app or press Cmd/Ctrl+V directly from your system clipboard.

2Step 2

Select Codec & Tune Quality

Choose WebP, AVIF, or MozJPEG in the right panel and slide the comparison bar to verify visual sharpness.

3Step 3

Save Optimized File Instantly

Click the download button in the bottom-right corner to save your compressed image with zero watermarks.

🎯 Best Use Cases

•Optimizing hero banners and blog thumbnails to boost Google PageSpeed & LCP scores
•Converting heavy PNG screenshots into crisp, lightweight WebP or AVIF assets
•Compressing confidential UI designs locally without uploading to cloud compressors

💳 Free Tier & Licensing Details

100% Free

Official Resource & Direct Backlink

Explore Squoosh on its Official Homepage

Direct verified link: https://squoosh.app

Launch Squoosh↗

Frequently Asked Questions about Squoosh

Q: Does Squoosh upload my photos to Google servers?

No. All image decoding, resizing, and compression happen 100% locally inside your web browser using WebAssembly.

Q: Which format should I choose in Squoosh for websites?

WebP and AVIF offer the best balance of small file size and crisp quality, both supported by all modern browsers.