Compress Images Online — Free & Private, No Server Upload
Reduce JPG, PNG, WebP, and HEIC file sizes right in your browser. Nothing is ever uploaded to a server — your photos stay on your device.
Drag & drop images here, or click to browse
JPG, PNG, WebP, HEIC · up to 50MB per image · processed entirely on your device
How Client-Side Compression Works (Privacy First)
Most online image compressors upload your photos to a remote server, process them, and send the result back — meaning your images pass through infrastructure you don't control. peopleinthelab.com works differently: every step happens locally in your browser using the HTML5 Canvas API and WebAssembly-based codecs.
100% Private
Your files are decoded, resized, and re-encoded on your device. They're never transmitted anywhere.
Instant Results
No upload or download round-trip to a server means compression starts the moment you drop a file.
Batch Friendly
Compress many images at once and download everything together as a single ZIP file.
Read more in our Privacy Policy · Terms of Service.
JPG vs PNG vs WebP Comparison
Choosing the right output format matters as much as the compression level itself. Here's how the three most common web image formats compare.
| Format | Compression | Transparency | Best for |
|---|---|---|---|
| JPG | Lossy | No | Photos, complex images with many colors |
| PNG | Lossless | Yes | Logos, screenshots, images needing transparency |
| WebP | Lossy or lossless | Yes | Modern web use — smaller files at similar quality |
Frequently Asked Questions
No. Every compression operation runs locally in your browser using the Canvas API and WebAssembly — a truly privacy-first image compressor with no server uploads. Your files never leave your device.