Best Free Online Image Compressors 2026

Images are the backbone of the modern web. Whether you're running a blog, an e-commerce store, or a social media campaign, image quality and file size directly impact your user experience and search rankings. Large, unoptimized images slow down page load times, hurt your Core Web Vitals scores, and frustrate visitors on slower connections.

Fortunately, there are excellent free tools available that can compress your images dramatically — often reducing file sizes by 60–80% — without any noticeable loss in visual quality. Here are the best free online image compressors you should know about in 2026.

1. Movfy Image Compressor

Movfy's Image Compressor is a standout tool that runs entirely in your browser. There's no upload to external servers, which means your images stay private and the compression happens almost instantly. It supports JPG, PNG, and WebP formats, and lets you adjust the compression level with a simple slider so you can find the perfect balance between file size and quality.

What sets Movfy apart is the combination of speed, privacy, and simplicity. You drag and drop your files, adjust the quality, and download your compressed images in seconds. It also supports batch compression, so you can process multiple images at once — a huge time saver for content creators and web developers.

2. TinyPNG

TinyPNG has been a beloved image compression tool for years, and it continues to deliver excellent results. It uses smart lossy compression techniques to reduce the file size of PNG and JPEG files. The free version allows up to 20 images per batch with a 5MB limit per file.

TinyPNG also offers a WordPress plugin and API access for developers who want to automate compression in their workflow. The results are consistently good, with minimal quality loss even at high compression ratios.

3. Squoosh

Developed by Google Chrome Labs, Squoosh is an open-source image compression tool that gives you granular control over the compression process. It supports a wide range of codecs including MozJPEG, WebP, AVIF, and more. The side-by-side comparison view lets you see exactly how compression affects your image before downloading.

Squoosh runs entirely in the browser using WebAssembly, so your images are never uploaded anywhere. It's perfect for developers and designers who want precise control over their compression settings.

4. Compressor.io

Compressor.io offers both lossy and lossless compression for JPEG, PNG, GIF, and SVG files. The interface is clean and straightforward — upload an image, choose your compression type, and download the result. It consistently achieves impressive compression ratios while maintaining visual quality.

The tool is free to use for individual files, and there's a pro version available for batch processing and higher file size limits.

5. ShortPixel

ShortPixel provides online image compression along with a popular WordPress plugin. It supports lossy, glossy, and lossless compression modes, giving you flexibility based on your needs. The free tier offers 100 image credits per month, which is sufficient for small websites and personal blogs.

ShortPixel also supports WebP and AVIF conversion, making it a future-proof choice for modern web development.

6. ImageOptim (Online)

Originally a Mac desktop app, ImageOptim now offers an online version that compresses JPEG, PNG, and GIF files. It removes unnecessary metadata and applies various optimization techniques to reduce file sizes without quality loss. It's particularly good at lossless compression where every byte counts.

Why Image Compression Matters

Beyond page speed, compressed images contribute to better SEO rankings, lower bandwidth costs, and improved accessibility for users on mobile networks. Google has consistently emphasized page speed as a ranking factor, and images are often the largest assets on any webpage.

A good compression workflow might look like this: export your images at reasonable dimensions, run them through a compressor like Movfy's tool or TinyPNG, and then serve them in modern formats like WebP when possible. Movfy's Image Converter can help with that last step.

Conclusion

All of these tools are free and effective. For quick, private compression without leaving your browser, Movfy's Image Compressor is hard to beat. For maximum control, Squoosh is excellent. And for automated workflows, TinyPNG's API integration is invaluable. The best approach is to pick the tool that fits your workflow and use it consistently — your visitors and your search rankings will thank you.