Image Compressor

Compress JPG, PNG, and WebP images online in your browser without uploading files to a server. Compare original vs compressed size, adjust quality, or set an exact KB target.

• Multi-image drag-and-drop batch compression with ZIP export
• Adjustable quality slider (1% to 100%) and optional target KB limit
• Side-by-side before/after preview with exact byte and percentage savings
• 100% local browser execution via HTML5 Canvas and Blob APIs

Frequently Asked Questions

Are my photos uploaded to any external server during compression?

No. Every image is decoded and re-encoded directly inside your web browser memory using native HTML5 Canvas APIs. Your files never leave your device.

Why does a PNG file sometimes stay large unless converted to WebP or JPEG?

Standard browser Canvas PNG encoding is lossless. For dramatic size reduction on photographic PNGs, switch the output format selector to WebP (which supports transparency with lossy compression) or JPEG.

Can I compress multiple images at the same time?

Yes. You can drop up to 20 images at once, inspect individual savings for each file, and download them individually or as a single ZIP bundle.