Compress Images Online
Free & Processed Instantly on Your Own Device
Your images are never sent to a server, so your privacy stays 100% protected. Compress as many as you like — no sign-up required.
Drag & drop images here, or click to browse
JPG, PNG, WebP, HEIC · up to 50MB per image · processed entirely on your device
No Server Upload
Your files are never stored anywhere else, so even sensitive photos stay 100% safe.
Instant, On-Device Compression
No waiting on a server upload — processing starts immediately.
Completely Free · No Limits
Use it as much as you like — no sign-up and no payment required.
How to Use & Why This Tool Is Completely Private
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: everything happens right on your own device, instantly, without your photos ever touching an outside server.
Compress an image in 3 steps
1. Drop in your images
Drag and drop one or many JPG, PNG, WebP, or HEIC files onto the drop zone, or click it to browse your device. There's no file-count limit and no sign-up required.
2. Adjust quality and format
Use the quality slider to balance file size against visual quality, optionally pick an output format (WebP, JPG, or PNG), and set a max width/height if you want to resize at the same time.
3. Download the result
Download each compressed image individually, or grab everything at once as a single ZIP file. The before/after file size is shown for every image.
Why it's built this way
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 vs HEIC Comparison
Choosing the right output format matters as much as the compression level itself. Here's how the most common image formats compare, and when to reach for each one.
| 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 |
| HEIC | Lossy | No | iPhone camera photos — convert to JPG for compatibility |
Format tips
- JPG: best for photos. A quality setting of 75-85% usually gives a big size reduction with almost no visible difference.
- PNG: lossless, so quality never degrades — but file sizes are larger. Use it for logos, screenshots, or anything that needs transparency or sharp text/line art.
- WebP: the best all-around choice for the web today. It typically produces smaller files than JPG at the same visual quality, and supports transparency like PNG.
- HEIC: the default format on modern iPhones. Browsers and most non-Apple apps can't open it directly, so this tool automatically converts HEIC photos to JPG as part of compression.
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.