🛝Toolio
All tools

🗜️ Image Compressor — Free & Offline

Compress JPG, PNG, and WebP images right in your browser — completely free, with no file upload or account required. Choose your quality level, pick an output format, and download the smaller image instantly.

🗜️
Drop an image here
or click to select — JPG, PNG, WebP

About

This tool re-encodes your image using the browser's native Canvas API, letting you control quality (10–100%) and output format (JPEG, WebP, or PNG). Because everything runs locally in your browser, your images never leave your device — no server, no cloud, no tracking. It works offline too, so you can compress images even without an internet connection.

How to use

  1. Drop your JPG, PNG, or WebP image onto the drop zone, or click 'Choose file' to select one.
  2. Adjust the quality slider (default 80%) — lower values produce smaller files with slightly less detail.
  3. Choose an output format: keep the original, convert to JPEG or WebP for lossy compression, or PNG for lossless.
  4. Click 'Compress' and compare the original vs. compressed previews along with the file size reduction percentage.
  5. Click 'Download' to save the compressed image to your device.

FAQ

Is this image compressor free to use?
Yes, it is completely free with no usage limits, no subscription, and no account required.
Do my images get uploaded to a server?
No. All compression happens inside your browser using the Canvas API. Your images never leave your device and are not sent to any server.
Does it work offline or without an internet connection?
Yes. Once the page has loaded, the tool works fully offline. No network connection is needed to compress or download your images.
Which image formats are supported?
You can load JPG, PNG, and WebP images as input. Output can be saved as JPEG, WebP, or PNG — allowing easy format conversion alongside compression.
Why doesn't the quality slider affect PNG output?
PNG uses lossless encoding, which means quality levels have no effect on the output. To reduce PNG file size with quality control, convert to JPEG or WebP instead.