Compress Image — Free, In Browser

Compress JPG, PNG, and WebP images in batch. 100% in your browser — free, no sign-up, no upload, no watermark.

How to

  1. 1Choose one or more images — they are processed in your browser, never uploaded.
  2. 2Pick an output format (WebP for smallest, JPG for compatibility) and a quality level.
  3. 3Compress and compare the new file size against the original.
  4. 4Download the compressed images.

What is image compression?

Compression makes an image file smaller by lowering quality slightly or re-encoding it in a more efficient format. A photo straight from a phone can be several megabytes; compressed, the same picture can look nearly identical at a fraction of the size — faster to upload, email, or load on a web page.

How compression works here

Each image is drawn to a canvas and re-encoded at the quality and format you pick, entirely in your browser. Nothing is uploaded, so the only practical limit is your device's memory. You can batch many images at once and compare the saved size before downloading.

When to compress images

Shrink photos before attaching them to an email or a web form, reduce page-load time on a website, fit images under an upload size cap, or save storage space. Compression matters most for large photos and screenshots, which are often far bigger than they need to be.

WebP for the smallest files

WebP usually beats JPG at the same visual quality, often by 25–35%, which is why it is the default for fast websites. Choose WebP for the smallest files, or JPG when you need maximum compatibility with older apps.

FAQ

Are my images uploaded?+

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

Which formats can I compress to?+

You can output WebP (smallest) or JPG (most compatible) from JPG, PNG, or WebP inputs, with a quality slider to balance size against sharpness.

Will compressing reduce quality?+

Lowering quality reduces file size; at moderate levels the difference is usually invisible. You can compare the result before downloading and adjust the quality if needed.

Can I compress many images at once?+

Yes. Add a whole batch and compress them together. Because it runs in your browser, the practical limit is your device's memory.

Is it free?+

Yes, completely free — no sign-up and no watermark.

Is my data private?+

Yes — this tool runs entirely in your browser. Your files and text are never uploaded.

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