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Free Image Compressor – Reduce Image Size Online Without Losing Quality

Compress JPEG, PNG and WebP images in your browser. Set the quality, crop if you need to, and download a smaller file.

Supports JPEG, PNG and WebP
Image preview for cropping
Lower quality gives a smaller file. 70 to 80% suits most web images. PNG ignores this setting.

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How to use the image compressor

  1. Upload your image. Choose a JPEG, PNG or WebP file from your device.
  2. Crop it (optional). Pick Free, 1:1, 16:9 or Circle, adjust the box, then click Apply crop.
  3. Set the quality. 70 to 80% works for most web images.
  4. Choose the output format. Use JPEG for photos, PNG for transparency and WebP for the smallest files.
  5. Set a maximum size (optional). Enter a width or height in pixels. Leave both blank to keep the original size.
  6. Click Compress and download the result.

JPEG, PNG or WebP: which format should you use?

The right format can cut file size before you touch the quality slider.

JPEG: best for photos

JPEG uses lossy compression, so it discards some data to keep files small. It suits photos and product images. It does not support transparency.

PNG: best for graphics and transparency

PNG is lossless, so quality stays intact but files are larger. Use it for logos, icons, screenshots and images with a transparent background.

WebP: best for web performance

Google says lossy WebP images are 25 to 34% smaller than comparable JPEGs, and lossless WebP is 26% smaller than PNG. It supports transparency and works in all major browsers.

Why optimise images for your website?

  • Faster pages. Images are often the heaviest files on a page.
  • Better Core Web Vitals. Smaller images help your Largest Contentful Paint score.
  • Less bandwidth. Smaller files cost less to serve.
  • Better on mobile. Visitors on slow connections wait less.
  • Lighter emails. Compress images before adding them to a campaign.

Frequently asked questions

What is an image compressor?

An image compressor reduces an image’s file size while keeping it good enough for its purpose.

Will compressing reduce image quality?

It depends on the quality setting. At 70 to 80% the difference is usually hard to see. Below 50% you may see artefacts, especially in photos.

What is the best quality setting for web images?

70 to 80% is a common range for website images. Thumbnails and backgrounds can often go lower.

Can I compress multiple images at once?

No. The tool handles one image at a time, so upload and compress each image separately.

Is my image stored on your server?

No. Compression runs in your browser. Your images are not uploaded to any server.

Is the Image Compressor free?

Yes. It is free and needs no account.

Sources

  1. Google for Developers, “An image format for the Web (WebP)“, accessed September 2026.
  2. web.dev, “Web Vitals“, accessed September 2026.

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