Best Free Image Compressors in 2026
We tested 7 image compressors on quality, speed, privacy, and features. Here are the results.
Try fileGOD — #1 PickAll tools tested. fileGOD: only one with zero server uploads.
There are dozens of image compressors online, but most upload your photos to their servers. We tested the 7 best free options in 2026, comparing compression quality, speed, privacy, and features. fileGOD is our top pick for privacy — it compresses images entirely in your browser with no server upload.
How It Works
We tested each tool
Identical images were compressed on all 7 tools. Output quality, file size, and speed were measured.
Privacy audited
Network traffic was monitored to verify which tools upload files and which process locally.
Ranked objectively
Tools scored on privacy, compression quality, format support, batch capability, and extras.
Why fileGOD?
1. fileGOD — Best for Privacy
100% browser-based. JPG, PNG, WebP, HEIC, SVG. Exact size targeting. 33+ total tools. Free tier with 3 guest uses.
2. Squoosh — Best for Technical Users
Google's open-source tool. Client-side. Single image only, no batch. Advanced codec settings.
3. TinyPNG — Best for PNG
Excellent PNG compression. Uploads to servers. Free: 20 images/month, 5MB each.
4. Compressor.io — Good All-Rounder
JPG, PNG, GIF, SVG. Uploads to servers. Free tier with limits.
5. ShortPixel — Best for WordPress
WordPress plugin and web tool. Uploads files. Free: 100 images/month.
6. Optimizilla — Best for Side-by-Side Preview
Visual before/after comparison. Uploads to servers. JPG and PNG only.
7. ImageOptim (Mac) — Best Desktop App
Mac-only desktop app. Local processing. No web version. JPG, PNG, GIF.