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Toolzum

Image Compressor

Shrink JPG, PNG, and WebP photos with an Image Quality slider (10–100%, default 80%) plus a Resolution Scale slider, shown in Before/After panels with exact KB and -% savings. Single-image uploads up to 50MB — local library work, unlimited saves.

Runs on browser-image-compression

100% Local Browser Native Bulk & Presets ✦ Pro

How to Use the Image Compressor

1. Upload one image

JPG, PNG, or WebP up to 50MB. One image per run — no batch mode.

2. Set quality and scale, then Apply

Quality and scale sliders run 10–100% in 5% steps. The preview does not update live — press Apply Compression to render.

3. Download output

Result banner shows exact KB and -% saved; file downloads as compressed-<name>.

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Frequently Asked Questions

How much smaller will my image get?

Typical JPEG photos shrink 60–80% at quality 80 with no visible difference on screens. PNG screenshots with flat colors often shrink less — converting those to WebP usually beats PNG compression.

Should I choose JPG, PNG, or WebP output?

There is no output-format picker — the only controls are the Image Quality and Resolution Scale sliders applied to your uploaded photo. Choose the source format that suits your content before uploading: photos as JPG/WebP, transparency graphics as PNG.

How does the quality slider work?

Set quality (default 80%) and scale (default 100%), then press Apply Compression — moving either slider clears the previous result, so nothing previews live. The After panel then shows the exact output size with a -% savings badge. Both sliders run 0.1–1.0 in 0.05 steps.

What is the file size limit?

50MB per image. Larger files are rejected before processing so the browser tab stays responsive. Resize dimensions first if your file exceeds the limit.

Are my photos uploaded anywhere?

No. Compression runs entirely in your browser via the browser-image-compression library. Your images never leave your device.

Last updated October 2026