WizzyTools

Compress an image online for free

Works offline · never uploaded

Reduce image file size while preserving visual quality, right in your browser.

Updated

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How it works

  1. 1

    Choose or drop a JPG, WebP or PNG image.

  2. 2

    Move the quality slider while watching the preview.

  3. 3

    Compare the new size with the original, then click Compress Image.

  4. 4

    Download the smaller file.

About the Compress Image

A photo straight from a phone or camera is often several megabytes, which slows down web pages and fills inboxes. This compressor re-encodes one image at a quality level you choose with a slider, keeping its pixel dimensions unchanged. The preview and the before-and-after file size update as you drag, so you can stop at the point where the saving is large and the photo still looks right.

What you can do

  • Drag the quality slider from 10 to 100 percent, starting at 75.
  • See the compressed preview redraw each time you move the slider.
  • Read the original and new file size side by side before you download.
  • Keep the same format as the input: a JPG comes back as a JPG and a WebP as a WebP.

When it works best

  • Speeding up a website by trimming hero images and blog photos.
  • Getting a JPG small enough to attach to an email or a support ticket.
  • Reducing WebP or JPG product photos without changing their dimensions.

Things to know

  • The image is encoded by your browser on your device and is never sent to a server.
  • PNG is lossless, so the slider has little effect on PNG files. Convert the image to JPG or WebP first for a real reduction.
  • Re-encoding drops EXIF data such as camera details and GPS location as a side effect.
  • Quality alone has limits. To hit an exact KB target, use Resize Image with "Resize by file size", which also lowers dimensions.

Frequently asked questions

No. Only the encoding quality changes; width and height stay the same.

PNG is lossless, so quality has little effect. Convert to JPG or WebP for a real reduction.

Yes, re-encoding drops EXIF data such as camera details and GPS as a side effect.

Use Resize Image in "Resize by file size" mode, which can also reduce dimensions.