Image tools · Available now
Reduce image file size without sending your pictures anywhere. Choose your quality, compare the result, and download.
Local processing
The practical guide
Compression should not feel mysterious. Here is what the tool changes, what it preserves, and why local processing matters.
It re-encodes JPEG and WebP files using your chosen quality setting. For PNG input, it reduces color precision in controlled steps before lossless encoding so the slider has a real effect without discarding transparency. Compression keeps the original width and height; resizing changes those pixel dimensions. You see each file size beside the result, and if the original is already smaller, the tool keeps it instead of claiming a false saving.
Your browser decodes each image into pixels, draws it to an off-screen canvas, then encodes a new file at your selected quality. A Web Worker handles supported browsers so large images are less likely to interrupt the interface.
Smaller images load faster, use less mobile data, make messages easier to send, and reduce storage. For websites, sensible image sizes also improve the experience for people on slower connections.
Privacy by architecture
Compression happens on the device in front of you. This tool does not make a network request containing image contents, filenames, dimensions, metadata, or compressed results.
The website’s code must still be delivered by its host. Read our privacy page for that careful distinction.
Questions, answered
No. This compressor decodes and re-encodes images in your browser. Image contents, filenames, dimensions, metadata, and results are not uploaded to any server.
No. Compression preserves the original pixel dimensions and reduces file size by changing the image encoding. Use the Image Resizer when you need a different width or height.
PNG uses lossless encoding and browsers normally ignore quality settings. This tool makes the slider meaningful by reducing color precision in controlled steps while preserving the PNG format and transparency. If the result is not smaller, we keep your original.
80% is a useful starting point for photos. Try 65–75% for smaller web images or 85–90% when fine texture matters. Preview the image before downloading.
Yes. Add up to twenty JPEG, PNG, or WebP images, apply one quality setting, and download each result or the full batch.
Once the page has loaded, the compression engine processes images locally without uploading them to any server. Full offline reopening is not guaranteed in this first release because the site is not yet installed as an offline app.