Page weight is mostly images, and most images are bigger than they need to be. The ChrysoKit Image Compressor cuts file sizes without sending your photos through someone else's server.
Why use it
Compression sites are a privacy risk. Family photos, internal screenshots, draft designs: none of them should be uploaded to a stranger's machine. Ours does the work locally.
How to use the Image Compressor
- Drag and drop one or more images onto the page.
- Pick a quality target (or trust the smart default).
- Wait a moment for the compression to finish.
- Download individually or as a zip.
Features worth knowing
JPEG, PNG, WebP
Three of the most common formats, all handled locally.
Batch mode
Drop a whole folder of images and compress them in one go.
Preview before download
Compare original and compressed side by side.
Pro tips
- JPEG quality 80-85 is usually indistinguishable from 100 to the eye, at half the size.
- PNG is best for graphics with sharp edges; JPEG is best for photos. Picking the wrong format is the most common compression mistake.
- WebP can save another 20-30% on top of JPEG with similar quality. Use it when your audience supports it.
Privacy first. The Image Compressor runs entirely in your browser. Nothing you enter is sent to a server.
If you ship images on the web, run them through the Image Compressor first. Faster pages, lower bandwidth, no upload required.
Open the tool: Image Compressor →
Compressing a real photo set: watching the quality slider earn its keep
Take a 24-photo gallery from a weekend trip... 87 MB off the phone... destined for a personal site. Compressing the set at different quality levels and actually inspecting the results teaches more than any theory.
At quality 90, the set drops to 31 MB: a 64% saving with literally invisible differences at any zoom level. At quality 80, 14 MB total... and finding differences requires 200% zoom on areas of fine texture like gravel and distant foliage, where a careful eye spots slight smoothing. At quality 70, 9 MB; skies remain perfect but a faint softness reaches hair and fabric at full-screen viewing. At quality 50, 5 MB and the compression is no longer a secret: blocky artifacts colonise gradients, and the sunset photos develop visible banding.
The set shipped at quality 80, one-sixth the original weight. The gallery's load time on a phone connection fell from "abandoned" to under three seconds.
The transferable lesson is to judge with your eyes at realistic viewing sizes, not with the percentage readout. Compression quality is content-dependent... portraits forgive more than architecture, skies less than crowds... and the slider's sweet spot moves with the subject. Five minutes of looking beats any universal number, though if you refuse to look, 80 remains an excellent refusal.