Image Compressor

Shrink JPG, PNG and WebP files with a quality slider — right in your browser.

Drag & drop images here
or click to choose files — you can also paste from clipboard

Large images are the number one reason websites and apps feel slow. This image compressor reduces file size by re-encoding your pictures with an efficient encoder while letting you control the trade-off between quality and size with a simple slider.

Unlike most online compressors, this tool does the work entirely inside your browser. Your photos are decoded, compressed and saved back to your device locally — they are never uploaded to any server. That makes it safe for private photos, screenshots with sensitive information, or confidential business documents.

You can process a single image or drop in a whole folder of files at once. After compression you get a clear before/after comparison showing exactly how many kilobytes you saved, and you can download results one by one or all together as a ZIP archive.

How to use

  1. Drag and drop your images onto the box above (or click to browse, or paste from the clipboard).
  2. Pick an output format — WebP usually gives the smallest files, JPEG is the safest choice for compatibility.
  3. Adjust the quality slider. Around 70–80 is visually indistinguishable from the original for most photos.
  4. Press Process, check the savings column, then download the results individually or as a ZIP.

Why use this tool?

Frequently Asked Questions

How much smaller will my images get?
It depends on the source. Photos exported from cameras or phones often shrink by 60–80% at quality 75 with almost no visible difference. Screenshots and graphics that are already optimized may only shrink slightly — if a result would be larger than the original, you can simply keep the original file.
Is lossless compression possible?
True lossless compression keeps every pixel identical to the original. This tool uses high-quality lossy encoding, which removes detail the human eye barely notices. For photographs this is the standard approach used by virtually every website; for pixel art or screenshots where text must stay razor sharp, use PNG output at maximum quality.
Are my images uploaded anywhere?
No. The compression runs in your browser using the Canvas API and WebAssembly. Your files never leave your device, which you can verify by disconnecting from the internet after the page has loaded — the tool still works.
Which format should I choose?
WebP for the smallest files on the modern web, JPEG when you need maximum compatibility with older software, and PNG when you need transparency or perfectly sharp text.