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Utilora

Free Image Compressor Online

Image Tools

Drop an image here or click to browse

What is Free Image Compressor Online?

Image Compressor reduces the file size of photos and graphics so they load faster on the web. It works entirely in your browser by drawing the image onto a canvas and exporting it at a lower quality setting. JPEG images are compressed by reducing the quality level (1-100), which discards subtle color information. PNG compression here converts to JPEG to achieve size reduction, since PNG is inherently lossless.

How it works

The image is decoded and drawn onto an HTML Canvas element. For JPEG output, the canvas is exported using toBlob() with the chosen quality level (0.0 to 1.0). Lower quality = smaller file. The tool shows the original and compressed file sizes so you can see the exact savings achieved.

Features & Benefits

  • Compresses images entirely in your browser - nothing is uploaded to a server
  • Supports JPEG, PNG, and WebP formats with format-appropriate compression
  • Shows before/after file sizes so you can measure the savings
  • Faster page loads: compressed images reduce bandwidth and improve Core Web Vitals

Frequently Asked Questions

Does the tool send my images to a server?

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

What quality level should I use?

For web use, 75–85% quality typically provides a good balance of visual quality and file size reduction. Higher is better for print.

Which formats are supported?

JPEG, PNG, and WebP. Note that PNG compression here converts to JPEG under the hood, producing a lossy result. For a true lossless PNG output, use a dedicated tool.

How much can it compress an image?

Results vary by image content, but most photos can be reduced by 50–80% with minimal visible quality loss at 80% quality.

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