How to compress images online for free?

Upload your image to Vectowl's compressor, set quality to 60-80%, and download. Everything is processed in your browser, completely free.

Does compressing reduce image quality?

At 70-80% quality, the difference is virtually invisible to the human eye while reducing file size by 60-80%.

Yes, WEBP typically produces 25-35% smaller files than JPEG at equivalent visual quality.

Free · No upload · 100% local

Reduce image file size up to 90% without visible quality loss. PNG, JPG, WEBP. Everything processed in your browser.

or click to browse — PNG, JPG, WEBP (up to 50 files)

Quality

80%

Higher = better quality, larger file. 60-80% is ideal for web.

Output format

WEBP gives the best compression. Auto keeps the original format.

Drag & drop or select your PNG, JPG, or WEBP images. Process up to 50 at once.

Set the quality slider. 60-80% reduces file size dramatically with almost no visible difference.

Download individually or all at once as a ZIP. Your images never leave your device.

Are my images uploaded to a server?

No. All compression happens locally in your browser using the Canvas API. Your images never leave your device.

What's the best quality setting?

For web images, 70-80% gives excellent results with significant file size reduction. For print, keep it above 90%.

Is WEBP better than JPEG?

Yes, WEBP typically produces 25-35% smaller files than JPEG at the same visual quality. It's supported by all modern browsers.

Can I compress PNG files?

Yes. When compressing PNG, you can convert to WEBP or JPEG for much smaller files, or keep PNG format with optimized encoding.