Compress Image Online
Reduce file size for JPG, JPEG, PNG, and WebP images directly in your browser. Fast, private, and no watermarks added.
Select or Drop Image Here
Drag & drop your image, paste from clipboard (Ctrl+V), or browse from device.
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Frequently Asked Questions
How does SizeSnap compress images?
SizeSnap uses your browser’s native HTML5 Canvas and WebAssembly graphics pipeline. It dynamically recalibrates image quantisation and color matrices without transferring a single byte of your photo across the internet.
Are my photos uploaded or stored on any server?
No. All processing happens 100% locally in your device’s memory (RAM). When you close the browser tab or hit Reset, the memory is cleared instantly.
Which image format yields the highest compression ratio?
WebP usually provides the best balance of ultra-small file size and pristine visual fidelity, outperforming traditional JPEG by 25–35% while supporting full transparent backgrounds.
Can I compress transparent PNG images?
Yes. PNG is inherently lossless. If you export as PNG, Canvas removes redundant metadata. If you select WebP, you can compress transparent images dramatically without losing transparent pixels.
Why did my file size not decrease much?
If your image was already heavily compressed by your camera or another utility, further compression without reducing resolution may yield diminishing returns. You can adjust the quality slider to 40–50% or convert to WebP.