ETK Image Compressor – World’s strongest image compression (free, offline)

Hey everyone – I’m the developer behind **ETK Image Compressor**.

After months of research, I built what I believe is the strongest image compression algorithm in the world. It reduces file size by up to 90% while preserving almost lossless quality – proven by side‑by‑side video comparisons against Photo Compress 2.0, Reduce Photo Size, and JPEGmini.

### 🔍 Why I built it

Most compressors either destroy quality or can’t handle large files (>20 MB). They also upload your images to external servers. ETK works fully offline, supports Large files, and gives you a live quality preview before saving.

### 💎 Current status

- **Free version** (Windows) already on Itch.io – 4 presets, watermark, ads (optional).

- **Pro version** coming very soon – batch processing, manual quality/resolution, advanced formats (WebP, AVIF, HEIC), 2x speed, for $29.99 one‑time.

### 🔧 Tech stack

Unity (C#), proprietary adaptive compression algorithm. Cross‑platform ready (Linux, WebGL, WordPress plugin next).

### 🙏 I’d love your feedback

- Does the compression speed feel acceptable in the free version?

- Which Pro feature would make you upgrade instantly?

- Any bugs or missing formats?

Try the free version here:

https://etk-games.itch.io/etk-im...

All questions and suggestions are welcome. Thanks!