Will PNG compression lose the transparent background?

Not at all! Our PNG compression engine perfectly preserves the transparent alpha channel, optimizing only the color palette and data chunks.

Why didn't the file size change much for some images?

If an image has already been heavily compressed previously, there is less room for further optimization. We recommend lowering the quality setting slightly or converting to WebP format.

How does local browser compression compare to server-based compression?

The quality is identical, if not better. We've compiled industry-standard engines (MozJPEG and OxiPNG) into WebAssembly to run directly in your browser. This means you get professional lossless quality while saving upload/download time and ensuring 100% privacy.

My images are huge (e.g., 50MB+). Can the browser handle them?

Yes, but pure frontend processing relies on your computer's RAM. If you are processing exceptionally large files, it may take a bit longer or hit browser memory limits. Ensure you have enough free memory for the best experience.

Image Compression

Utilizes advanced WASM algorithm engines like MozJPEG and OxiPNG to efficiently compress JPEG, PNG, and WebP images locally. Dramatically reduce file sizes while maintaining lossless visual quality.

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Completely Free & No Signup Required

About Image Compression

State-of-the-Art WASM Engine

Integrates industry-grade compression algorithms, achieving significantly higher compression ratios than default browser exports.

Perfect Quality-Size Balance

Intuitively adjust compression quality with a slider, previewing estimated file sizes and visual differences in real-time.

Ultra-Fast Local Batch Processing

Drag and drop multiple images for parallel compression. Everything runs instantly in your browser without ever uploading to a server.

Comprehensive Coverage of Work and Creative Scenarios

Web Development

Web Performance Optimization

Compress large website assets by over 70% to drastically improve page load speeds and Lighthouse scores.

Daily Tasks

Strict Upload Limits

Easily bypass file size restrictions on forums, application portals, or social media platforms that limit uploads to 2MB or 500KB.

Storage Management

Storage Space Optimization

Batch compress massive photo libraries to free up valuable storage on your phone or cloud drives.

How to use Image Compression

Drag & Drop Images

Drop your JPEG, PNG, or WebP images into the compression zone.

Tweak Compression Settings

Use the quality slider to instantly preview the resulting file size and image quality.

Download Compressed Files

Click export to download your highly compressed, visually lossless images.