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Image Compressor

Shrink JPG, PNG and WebP files by up to 90% without visible quality loss.

100% Client-Side

Drop up to 20 images, pick a quality and size limit, then download the smaller files.

How to use the Image Compressor

  1. 1

    Drag and drop your JPG, PNG or WebP images onto the upload area, or click to choose files.

  2. 2

    Adjust the quality slider. 0.7–0.8 is a good balance between size and clarity for photos.

  3. 3

    Optionally set a maximum file size in KB or MB — the compressor will aim to stay under it.

  4. 4

    Compare the before and after preview and the exact size savings for each image.

  5. 5

    Download images one by one or grab them all in a single ZIP file.

Frequently asked questions

No. Compression runs entirely in your browser using a Web Worker, so your photos never leave your device. You can even use the tool offline once the page has loaded.

Typical phone photos shrink by 60–90% at quality 0.8 with no visible difference. PNG screenshots and graphics often shrink less because they are already efficiently encoded.

It sets a target file size. The compressor repeatedly lowers quality and, if needed, the dimensions until the image fits under your limit — useful for upload forms with strict size caps.

If an image is already well optimized, re-encoding can make it slightly larger. In that case AnyToolBox keeps your original file and marks it as already optimized.

You can compress up to 20 images at a time, each up to 50 MB. Very large images use more memory, so older phones may be slower.

More image tools

Image Converter

Convert images between PNG, JPG and WebP in bulk. AVIF input supported.

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Crop & Resize Image

Crop to any aspect ratio, rotate, flip and resize to exact pixel dimensions.

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Compress Image to 20KB

Shrink photos and signatures to under 20 KB for online application and exam forms.

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Tell us what would make Image Compressor more useful, or what to build next.