10 Best Free Image Compression Tools in 2026

Large image files slow down websites and take up storage space. Image compression reduces file size while maintaining visual quality. Here are the best free image compression tools available in 2026.

1. TinyPNG / TinyJPG

TinyPNG is the most popular image compression tool on the web. It uses smart lossy compression to reduce PNG and JPEG file sizes by up to 80% while preserving transparency and quality. The free version supports up to 20 images at once, each up to 5 megabytes. TinyPNG also offers a developer API for automated compression.

2. Squoosh by Google

Squoosh is an open-source image compressor developed by Google. It runs entirely in your browser without uploading images to a server, making it ideal for sensitive images. Squoosh lets you compare original and compressed images side by side. It supports JPEG, PNG, WebP, AVIF, and JPEG XL formats with adjustable quality sliders.

3. Compressor.io

Compressor.io supports JPEG, PNG, GIF, SVG, and WebP compression. It offers both lossy and lossless compression modes. The lossy mode achieves up to 90% file size reduction with minimal visible quality loss. The free version compresses images up to 10 megabytes. It is fast and does not require registration for basic use.

4. ILoveIMG

ILoveIMG is a versatile online tool that compresses, resizes, and converts images. Its compression tool supports batch processing of up to 10 images at once. You can choose between extreme compression (smallest file size) and normal compression (best quality). ILoveIMG also includes a bulk resize tool in the same interface.

5. Optimizilla

Optimizilla compresses JPEG and PNG images with a unique slider interface. You can drag between original and compressed versions to see the quality difference in real time. The tool suggests optimal compression settings automatically. It processes up to 20 images simultaneously and is completely free with no registration.