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ToolPika

Image Compressor

Add your images to make them smaller. They are compressed on your device, and if an image cannot get smaller, the original is kept.

75%

Lower means smaller files. 70–80% is usually indistinguishable from the original for photos.

Save as

PNG is lossless, so it barely shrinks as PNG. Choose WebP (keeps transparency) or JPG for much smaller files.

Runs in your browser. Nothing you enter is sent to a server.

How it works

Each image is decoded by your browser and saved again with the compression settings you choose:

  1. Quality sets how much detail JPG and WebP compression may discard. Lower values give smaller files.
  2. Save as keeps the original format, or converts to WebP or JPG, which usually gives the biggest savings for PNG images and photos.
  3. Limit the longest side also scales down images larger than the size you pick. Pixel count has the largest effect on file size: a 4000 × 3000 photo limited to 1920 px has less than a quarter of the pixels.

If the compressed version is not smaller than your original, and nothing else changed, the original file is kept and marked “Already optimized”. You never get a bigger file back.

Compression also removes photo metadata such as GPS location and camera details, after applying the photo’s rotation.

Which settings to use

Goal Settings
Photos for a website WebP, 75–80%, limit to 1920 px
Email attachments JPG, 70–80%, limit to 1600 px
Keep maximum quality, just smaller Same format, 85–90%
Screenshots and graphics with transparency WebP, 80–90%

Everything runs in a background thread one image at a time, so even large batches do not freeze the page.

Frequently asked questions

How much smaller will my images get?

It depends on the image. Large photos straight from a phone or camera usually shrink a lot at 70–80% quality, especially if you also limit the longest side. Images that are already compressed may barely change; in that case the tool keeps your original instead of making it worse.

Will I lose quality?

JPG and WebP compression removes detail that is hard to see. Around 75% quality, most people cannot tell the difference in photos. Text, sharp edges and flat colours show artefacts sooner, so check those images at full size.

Why doesn't my PNG get smaller?

PNG is lossless, so saving it again as PNG gives almost the same size. Choose WebP, which keeps transparency, or JPG if you do not need transparency, to make it much smaller.

Are my images uploaded?

No. Compression happens in your browser, so your images never leave your device.

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