Squoosh Online - Free Image Compressor & Format Converter
Squoosh is a free online image compressor and format converter built by Google that shrinks your photos and graphics directly in the browser, with a live before-and-after preview so you can see exactly how much quality you trade for a smaller file. Because everything runs locally, there is nothing to install and your images never leave your device.
It is completely free to use, with no account or sign-up required.
Starting Squoosh…
What is Squoosh?
Squoosh is a free online image compressor and format converter created by Google as part of its Chrome Labs work. It lets you take a photo or graphic, shrink its file size, and optionally convert it to a more efficient format, all inside a web browser. You don't need to register, create an account, or pay anything to use it.
What sets Squoosh apart is its live comparison view: you load an image, choose a compression codec and settings, and a slider lets you drag back and forth between the original and the compressed result. This makes it easy to find the sweet spot where the file is much smaller but still looks good. Squoosh is especially popular with web developers, designers, and bloggers who need lightweight images that load quickly without obvious quality loss.
Key Features of Squoosh
How to Use Squoosh
Open the Squoosh app
Open any modern browser, such as Chrome, Firefox, Edge, or Safari, on your desktop, laptop, or mobile device and go to the Squoosh website.
Add your image
Drag and drop an image onto the page, or click to browse and select a photo or graphic from your device. Squoosh loads it instantly into the comparison view.
Choose a format and settings
On the right panel, pick an output codec such as MozJPEG, WebP, or AVIF, then adjust the quality slider, resize the image, or reduce colors as needed.
Compare the result
Drag the divider between the original and compressed versions to inspect the quality, and watch the new file size and percentage saved update in real time.
Download the compressed image
When you are happy with the balance of size and quality, click the download button to save your optimized image to your device.
How Squoosh Works
Squoosh processes images entirely on your own device using modern web technology, so nothing is sent to a remote server. You simply open the Squoosh app in a browser and drop in an image. The screen then splits into two panels: the left shows the original and the right shows your compressed output.
From the right-hand panel you can choose an output format and tune its settings. Squoosh supports several codecs, including:
- MozJPEG for high-quality JPEG compression
- WebP for smaller files with good quality, widely supported on the web
- AVIF for cutting-edge compression and very small files
- OxiPNG and color-reduction options for lossless or palette-based PNGs
As you change the quality slider or codec, Squoosh instantly recalculates the new file size and shows the percentage saved. You can also resize the image, reduce its color palette, and apply dithering, all while watching the live preview update.
What Can You Do with Squoosh?
Squoosh is built around one core job, compressing and converting images, but that covers a wide range of practical uses:
- Speed up websites by shrinking hero images, thumbnails, and banners so pages load faster.
- Convert images to WebP or AVIF to serve modern, lightweight formats that improve performance scores.
- Prepare images for email and messaging when you need to stay under attachment size limits.
- Reduce upload sizes for marketplaces, portfolios, and content management systems that cap file dimensions.
- Compare codecs visually to decide which format gives the best quality for a given file size.
- Resize images down to the exact pixel dimensions you need before exporting.
Because it keeps your files local and runs instantly, Squoosh is a quick, dependable choice whenever you need a smaller image without firing up heavyweight editing software.
Pros and Cons of Squoosh
Pros:
- Completely free with no account or sign-up
- Processes images locally, so your files stay private
- Live side-by-side preview makes quality choices easy
- Supports modern formats like WebP and AVIF
- Works in any modern browser with nothing to install
Cons:
- Focused on compression and conversion, so it is not a full photo editor
- Handles one image at a time in the web interface rather than large batches
- Advanced codecs such as AVIF can take longer to encode on older devices
Conclusion
Squoosh is one of the simplest and most trustworthy ways to compress and convert images online. It strips away the complexity of bulky software and focuses on doing one thing extremely well: making your images smaller while letting you control exactly how much quality you keep. With its live before-and-after preview, support for modern formats like WebP and AVIF, and the privacy of fully local processing, Squoosh is a smart pick for developers, designers, and anyone who wants faster-loading, lighter images for free.
Squoosh FAQs
Squoosh is a free online tool from Google used to compress images and convert them between formats such as JPEG, PNG, WebP, and AVIF, all directly in your browser.
Yes. Squoosh is completely free with no account or sign-up required, and it is open source as part of Google's Chrome Labs.
No. Squoosh processes images locally on your own device, so your files never leave your computer or phone, which keeps them private.
Squoosh works with common formats like JPEG, PNG, and WebP, and it can also encode to modern formats such as AVIF, using codecs like MozJPEG, WebP, AVIF, and OxiPNG.
Compression can reduce quality, but Squoosh gives you full control with a quality slider and a live side-by-side preview so you can shrink the file while keeping the look you want.
Yes. Squoosh runs in any modern web browser, so you can use it on desktops, laptops, tablets, and smartphones with nothing to install.
