Picsova

Compress Image

Reduce the file size of JPG, PNG, and WebP images with a quality slider and live size preview. Compression runs locally so your images stay private.

Runs entirely in your browser. Nothing is uploaded.

Shrink file size, keep the quality

Large images are the most common reason a page loads slowly or an upload gets rejected, but compressing them usually means handing your files to a stranger's server. Here the quality slider and the resulting file size are calculated on your own device, so you can push the size down while watching exactly what it costs you visually, and stop at the point where the trade-off stops being worth it.

How to compress an image

  1. 1

    Add an image

    Drop in a JPG, PNG, or WebP file. It is decoded locally by your browser.

  2. 2

    Find your quality point

    Move the quality slider and watch the estimated output size update against the original, so the saving is never a guess.

  3. 3

    Download the smaller file

    Save the compressed image once the size and the look are both right.

Good to know

  • Shows the original size, the compressed size, and the percentage saved, so you can hit a specific upload limit deliberately.
  • Converting a PNG photo to JPG or WebP usually saves far more than any quality setting — screenshots and photos compress very differently.
  • Hidden metadata is dropped as a side effect of re-encoding, so compressed files are also cleaner.
  • Nothing is uploaded, so there is no file-size cap, daily quota, or queue.

What people use it for

  • Getting a photo under an email, form, or job-application attachment limit
  • Reducing page weight and improving Core Web Vitals on a site you maintain
  • Making a batch of images small enough to send over a slow connection

Frequently asked questions

How much smaller can my image get?+

Photos typically shrink 60-90% with little visible quality loss. Drag the quality slider and watch the live file-size readout to find your sweet spot.

Will compressing lose quality?+

JPG and WebP use lossy compression, so very low settings can soften detail. At 70-85% quality the difference is usually invisible. PNG stays lossless.

Is it really private?+

Yes: compression runs in your browser with the Canvas API. Your image is never uploaded, and metadata is stripped in the process.

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