5 Free Image Compression Tools Compared (2026)

If you're like me, you've been asked "why is this page so slow?" more times than you'd like to admit — and the answer is almost always images. A single unoptimized hero image can add 3-5MB to your page load. So I spent a weekend testing free image compression tools to see which ones actually deliver. Here's what I found. The Contenders I tested each tool with the same set of 10 images (mix of PNGs and JPEGs, ranging from 500KB to 8MB) and compared output quality, file size reduction, and overall experience. 1. TinyPNG Website: tinypng.com The OG of online image compression. TinyPNG has been around forever and it just works. Pros: Excellent compression ratios (typically 60-80% reduction) Supports PNG, JPEG, and WebP Has a great API for automation Photoshop/Figma plugins available Cons: Free tier limited to 20 images per batch, max 5MB each Images are uploaded to their servers (privacy consideration) No offline option If you need an API for your build pipeline, TinyPNG is hard to beat. T