AllImageTools logoAllImageTools

FREE ONLINE IMAGE TOOL

Free Image Compressor OnlineFor JPG, PNG and WebP

Compress JPG, PNG and WebP images for websites, email and upload forms. Choose quality or a maximum size in KB or MB, then compare your results before downloading.

  • No signup
  • Batch compression
  • Browser-based processing

Compress your images

Add one image or a batch. Review actual sizes and quality before saving.

Need a specific KB limit?

Drag & drop images

Supports JPG, PNG and WebP

Compression settings

Lower quality makes smaller files but can remove visible detail.

JPG and WebP use lossy compression here. Results may look similar, but image data is removed. JPG replaces transparency with white.

Savings depend on the image, format and settings. JPG and WebP output is lossy. About local processing and privacy.

How to compress an image online

  1. 1. Add your images

    Choose JPG, PNG or WebP files, or drag them into the upload area. Select multiple files to compress a batch.

  2. 2. Choose your settings

    Set quality manually or choose Exact-KB target for a size ceiling. Pick an output format your destination supports.

  3. 3. Compare and download

    Click Compress images. Review file size, dimensions and detail, then download individually or as a ZIP.

Big picture. Smaller file.

Make room for more.

Get your photos ready to upload, share, and send. Choose the balance of quality and file size that works for you.

Before compression: an alpine lake with mountain reflections
BeforeOriginal image
After compression: the same alpine lake scene in a smaller WebP file
AfterLess space. Ready to share.

Illustrative previews. Results vary with your image, format, and quality settings.

Which image format should you choose?

There is no single setting that works best for every image. Inspect text, edges and textures in the output. A quality setting is not a percentage reduction in file size.

JPG

Photographs & everyday uploads

A practical choice for photos when your destination requires JPG. Lower quality can reduce size but may introduce artifacts. Transparent areas become white.

Convert JPG to WebP
PNG

Logos, transparency & sharp text

Preserves transparency and uses lossless encoding of the rendered pixels at unchanged dimensions. The quality slider does not apply, and savings are not guaranteed.

Convert PNG to JPG
WebP

Web images with transparency

Supports transparency with lossy quality controls in this tool. Compare the output and confirm that the website or form you use accepts WebP.

Convert WebP to PNG

Compress an image to a KB or MB limit

Choose Exact-KB target above and enter your maximum size. It aims for an output at or below that limit, not an exact byte count. Keep resizing off to preserve dimensions; enable it only if smaller dimensions are acceptable. Always check the result’s target status.

For 500 KB, 1 MB or another size, use the custom control above. 1 KB = 1,024 bytes; 1 MB = 1,048,576 bytes. Check your destination’s own requirements.

Not getting the result you need?

The file is still over the target
Try another accepted format, a larger limit or optional resizing. A small target may not be possible while keeping the original dimensions.
The image looks blurry
Increase quality, keep dimensions unchanged and start from the original. For text and logos, try PNG. Inspect the downloaded file at full size.
PNG does not get smaller
PNG ignores the quality slider. An efficient PNG may show no savings. WebP can be an alternative if your destination accepts it.
The transparent background is gone
Choose PNG or WebP to retain transparency. JPG replaces transparent areas with white.

Need a different width or height? Use the image resizer before compressing. Smaller dimensions can reduce file size but also remove detail.

Before you use the compressed image

  • Open the download at full size. Check small lettering, gradients, hair and detailed textures rather than judging only a fitted preview.
  • Confirm the actual bytes, pixel dimensions and accepted file format against your upload destination’s requirements.
  • Keep your original for future edits. Repeated lossy exports can remove more detail; exported metadata and color profiles may differ.

Why the controls differ: browser canvas supports a quality parameter for lossy formats such as JPG and WebP. See MDN’s canvas encoding documentation.

Your files are processed in your browser

The compressor reads selected files locally, encodes them using browser canvas, and assembles downloads and ZIP files on your device. Its processing code does not upload image files. The surrounding site also uses analytics and may load advertising resources. See our privacy policy for site-wide data handling.

Image compression FAQs

How do I compress an image to 100 KB?

Select your image, choose Exact-KB target, and select the 100 KB preset. Choose an output format, then compress. Check whether the result says Target met before downloading. You can enter a different maximum size in KB or MB.

Does Exact-KB produce an exact byte count?

It aims for a file at or below your maximum size, rather than padding to an exact byte count. Some images cannot reach a small target with the chosen format and dimensions. Resizing is optional and off by default. Here, 1 KB is 1,024 bytes and 1 MB is 1,048,576 bytes.

Can I compress images without losing quality?

JPG and WebP use lossy encoding in this tool. Visible changes depend on image content and settings, so inspect the result. PNG encodes the browser-rendered pixels losslessly at unchanged dimensions and preserves transparency. It does not guarantee smaller files or preserve every source metadata field.

Why is the compressed image no smaller?

Your original may already be efficient, or the selected format may require more bytes. PNG ignores the quality slider. When format and dimensions are unchanged, the tool keeps the original if it is smaller than the encoded output. Try another format or smaller dimensions if your use allows it.

Can I compress multiple images at once?

Yes. Select multiple JPG, PNG or WebP files, then apply shared quality or target settings. The size limit applies to each image. Review original and output sizes, remove unwanted result rows, and download individual images or the remaining results as a ZIP.

Are my images uploaded to a server?

The compressor reads and processes selected images in your browser and creates downloads locally. The compression code does not upload your image files. The surrounding site also loads analytics and may load advertising resources, which make their own network requests. See the privacy policy for site-wide data handling.

More tools for your images