JoliTools

Image Compressor

Reduce JPG, PNG and WebP file size without visible quality loss

or drag & drop a JPG, PNG or WebP file here

Processed 100% in your browser, nothing is uploaded.

About this tool

Large image files slow down websites, eat mobile data, and bounce off email attachment limits. The JoliTools image compressor shrinks JPG, PNG and WebP files in seconds, directly on your device, with a live preview of exactly what you will download.

Unlike many online compressors, there is no upload queue, no account, and no watermark stamped on your photo. Drag the quality slider to balance file size against visual fidelity, or set a maximum dimension to downscale oversized camera photos before sharing them.

How to use the image compressor

  1. 1Click “Choose image” and select a JPG, PNG or WebP file from your device.
  2. 2Pick an output format and drag the quality slider (70–85% is the sweet spot for photos).
  3. 3Optionally set a maximum width or height to downscale large photos.
  4. 4Click “Compress image” and compare the before/after file sizes.
  5. 5Click “Download” to save the optimized image to your device.

Good to know

For the web, aim for images under 200 KB; for email attachments, under 1 MB is a safe target. Converting PNG screenshots to WebP often cuts file size by 50% or more with no perceptible change.

Frequently asked questions

Some quality reduction is unavoidable with lossy formats like JPEG and WebP, but at quality settings of 70–85% the difference is virtually invisible for photos on screens. PNG output uses lossless compression, so quality is preserved exactly while metadata is stripped.

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Part of Image Tools on JoliTools, free tools, no sign-up.