Image Compressor

Compress JPG, PNG, WebP, and AVIF images without quality loss. Free, instant, and 100% private.

100% Private
Your files never leave your device
Lightning fast
Optimised for speed
No sign-up
Use instantly, no account

Shrink JPG, PNG, WebP, and AVIF images to a fraction of their size while keeping them sharp. Primova compresses in your browser using the same codecs (MozJPEG, OxiPNG, libwebp, libavif) that power professional pipelines — so you get smaller files without uploading anything.

How to use Image Compressor

  1. 1Drop one or more images onto the page, or click to choose them.
  2. 2Pick a target quality, or switch to “target size” to hit an exact KB budget.
  3. 3Watch each image compress with a live before/after comparison.
  4. 4Download a single image, or grab everything as a ZIP.

How much smaller can my images get?

Most JPEGs and PNGs shrink by 50–80% with no visible loss of quality. A typical 4 MB phone photo drops to well under 1 MB, and screenshots saved as PNG often compress the most because they contain large flat areas of colour. Detailed photographs compress less than simple graphics, so the exact saving depends on the image.

If you need to hit an exact budget — say under 200 KB for an email attachment or a web hero image — switch to target-size mode and Primova searches for the highest quality that still fits under your limit.

Choosing the right output format

For photographs, WebP and AVIF typically beat JPEG by 25–50% at the same visual quality, and every modern browser supports them. For graphics that need transparency, WebP and PNG both preserve the alpha channel. If you need maximum compatibility with older software, keep JPEG for photos and PNG for graphics.

Re-encoding a PNG to WebP is one of the biggest single wins for web performance — it is especially effective on screenshots and exported UI mockups.

Frequently asked questions

No — compression runs entirely in your browser using WebAssembly codecs (MozJPEG, OxiPNG, libwebp, libavif). Your photos are read from disk, processed on your own CPU, and never sent to any server.
You control the trade-off. At high quality the difference is invisible to the eye while the file gets dramatically smaller. Drag the slider down for even smaller files, and use the before/after comparison to find the sweet spot.
JPG/JPEG, PNG, WebP, and AVIF — both as input and output. You can also re-encode to a more efficient format (for example PNG → WebP) to save even more.
Yes. Add as many as you like, compress them in a batch, and download them all as a ZIP. Each file can also use its own quality if you open its detail view.
Yes — unlimited images, no sign-up, no watermark, and no daily cap. Because it runs on your own device there is no server cost to pass on to you.

Still have questions?

If you can’t find the answer you’re looking for, our support team is here to help.

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