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Image Compressor

Shrink JPG, PNG and WebP files while keeping them looking great. Move the slider to balance quality and size, and see exactly how many kilobytes you save.

  • Never uploaded
  • Free, no sign-up
  • No watermark
  • Works on phones
  • Works offline

Your files are processed on your device and never uploaded.

    See what it does

    Close-up of a large photo of a man’s face, before compressionBefore: Original, 662 kB
    The same close-up after compression, looking almost the sameAfter: Compressed, 291 kB
    Made with this tool’s default settings: 662 kB → 291 kB at the same 1792 × 2400 px. Close-up at 100 % zoom. The person in this example is AI-generated.

    How to compress images

    1. Add one or more images by dropping them above or tapping to choose.
    2. Adjust the quality slider. Lower quality means a smaller file. Optionally choose a different output format.
    3. Compare the before and after sizes, then download the images one by one or as a ZIP.

    Why use Picsawa

    • Private by designFiles are processed on your device and never uploaded.
    • Free, no sign-upNo account, no watermark and no daily limits.
    • Works everywherePhones, tablets and computers, in any modern browser.
    • Batch friendlyProcess up to 50 images at once and download a ZIP.

    About the Image Compressor tool

    JPG and WebP images are re-encoded with modern settings (progressive JPEG with optimized tables, chroma subsampling below quality 90) that save space with no visible difference at the default setting of 75.

    PNG images are compressed by reducing them to a smart palette of up to 256 colors, the same technique used by popular PNG optimizers. Transparency is preserved. Set the slider to 100 to keep PNGs pixel-perfect (lossless).

    If an image is already smaller than what the compressor can produce, your original file is kept so you never download a bigger version by accident. Every re-compressed image is saved without hidden metadata such as GPS location.

    Frequently asked questions

    What quality setting should I use?

    Start with 75. It typically cuts photo sizes by 50 to 80 percent with no visible difference. Go down to 50 to 60 for thumbnails or email, or up to 85 to 90 for prints and portfolios.

    Does compressing a PNG keep transparency?

    Yes. PNG compression reduces the number of colors but keeps transparent and semi-transparent pixels. If you convert to JPG instead, transparent areas become white.

    Why is the compressed file sometimes the same size as the original?

    Some images are already heavily optimized. If re-compressing would make the file larger, the tool keeps your original and tells you so.

    Can I compress many images at once?

    Yes. Add up to 50 images at a time; they are processed one after another and you can download them all together as a ZIP file.

    Is it safe to compress private photos here?

    Yes. Everything happens on your device in the browser. Nothing is uploaded, stored or seen by anyone else.