Best Free Image Compressor Online
Image compression tools reduce file size without (ideally) visible quality loss. The best free options in 2026 process locally or have generous free tiers. Here is our honest comparison.
Top image compressors compared
| Tool | Processing | Formats | Batch | Limit |
|---|---|---|---|---|
| Irreva | Browser (Canvas API) | JPG, PNG, WebP | Yes + ZIP | No limit |
| Squoosh (Google) | Browser (WebAssembly) | JPG, PNG, WebP, AVIF, etc. | No | No limit |
| TinyPNG | Server upload | JPG, PNG, WebP | Yes | 20/batch free |
| Compressor.io | Server upload | JPG, PNG, GIF, SVG | No (free) | 10MB limit |
Quality verdict
Squoosh offers the most codec options including AVIF and MozJPEG. TinyPNG produces excellent PNG quantization. Irreva balances convenience (batch + ZIP + KB targeting) with full browser-side privacy. For most users, Irreva handles daily compression without any upload concerns.
Frequently Asked Questions
Which compressor produces the smallest files?
Squoosh with AVIF codec produces the smallest files, but AVIF encoding is slow. TinyPNG leads for PNG quantization. Irreva's WebP output is competitive with TinyPNG.
Is TinyPNG really free?
TinyPNG's web tool is free for up to 20 images per batch. Their API is paid after a free tier.