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Minimal design · Private image workshop

Best Free TinyPNG Alternative in 2026: Unlimited Client-Side Batch Compression

Why upload sensitive design assets to a remote cloud server with a 20-file limit? See how 100% client-side browser compression delivers unlimited speed and total privacy.

Traditional online image compressors rely on remote cloud servers: you upload your files, wait in a processing queue, and download the results—with limits and paid features that vary by provider and plan.

Why Client-Side Compression Wins

Image compression FAQ

Are my images uploaded to a server?

No. Image compression and conversion run locally in your browser. Advertising may make network requests, but your selected image files are not uploaded.

Why can an image get much smaller and still look clear?

Re-encoding and PNG color quantization remove information that can be less noticeable at normal viewing sizes. Savings vary, and lossy settings can affect detail.

How do I batch convert transparent PNG to WebP?

Open the PNG to WebP tool, add your files, review transparent edges in the comparison preview and download the ZIP.

Are there file or batch size limits?

There is no application batch count or 5MB service limit. Files over 50MB can work, subject to available browser memory and image dimensions.

How do I compare image quality?

Open the comparison preview for a processed image and drag the center divider to inspect the original and result.

Is LionPress free and does it need an account?

The compression, conversion, resizing and ZIP tools are free to use without an account.

Image compression & performance guides