Image Compressor

Compress JPG, PNG & WebP images to 100KB, 200KB, 500KB or 1MB — entirely in your browser.

Your images are processed locally in your browser. They are never uploaded to our server.

Drag & drop your image here

or click to browse — JPG, PNG, WebP

Target size

How it works

  1. Choose your image

    Drag and drop a JPG, PNG or WebP image, or tap to browse. Everything stays on your device.

  2. Pick a target size

    Select 100 KB, 200 KB, 500 KB, 1 MB, or type your own custom size.

  3. Press Compress

    The tool adjusts quality first, then dimensions only if needed, until the output fits your target.

  4. Compare and download

    Preview the result side by side with the original, then download your compressed image.

Why compress images?

Large photos slow down websites, eat up storage and take forever to share. Compressing an image to 100 KB, 200 KB, 500 KB or 1 MB keeps it looking great while making it far easier to email, upload, or publish. Because processing happens in your browser, you keep full control of your files — there is no queue, no waiting and no privacy risk.

The compressor balances three goals: hitting your target file size, preserving visual quality, and keeping reasonable dimensions. It never makes an image unnecessarily tiny just to meet the goal.

Frequently asked questions

Is the WIS Image Compressor free?

Yes. It is completely free — no account, no registration, no watermarks and no limits.

Are my images uploaded to a server?

No. All processing happens locally in your browser with JavaScript. Your images are never uploaded, stored or transmitted, so they never leave your device.

Which image formats are supported?

JPG, JPEG, PNG and WebP are supported in every modern browser. HEIC files are decoded and compressed whenever your browser is able to read them.

Can I compress to exactly 100KB, 200KB, 500KB or 1MB?

Yes. Pick a preset or enter a custom size in KB or MB. The tool compresses until the output is at or below your target size.

What happens if my image is already smaller than the target?

It is kept as-is and returned unchanged, so it is never re-encoded unnecessarily.

What if my image cannot reach the requested size?

The tool returns the closest best result and tells you so, instead of making the image unnecessarily tiny or heavily degraded.

Does it work on mobile phones?

Yes. The interface is mobile-first and touch-friendly, and works on iOS, Android and desktop browsers.

Will my image lose quality?

Compression is lossy by nature, but the tool prioritises visual quality while meeting the target size, and you can preview the result before downloading.