Compress JPEGs Without Uploading

Optimize images instantly and privately in your browser. No uploads. No waiting. No data leaving your device.

Why compress JPEG images?

Large images slow pages, increase bounce rates, hurt Core Web Vitals, and burn bandwidth. Compressing JPEGs is a fast, high‑impact optimization for UX and SEO.

The problem with traditional online compressors

Privacy risks: images are uploaded to third‑party servers.
Time cost: uploads and re‑downloads are slow.
Bandwidth waste: needless transfers for a task that can run locally.

How browser‑based compression works

JPEGMinify uses WebAssembly to run advanced JPEG encoders directly in your browser. Processing stays on‑device, so results are private and near‑instant.

Private by design — zero uploads
Fast — uses your device’s CPU
Reliable — even on slow networks

Step‑by‑step: compress images with JPEGMinify

Open: JPEGMinify
Add image: drag & drop or click to select a JPEG
Tune quality: adjust the slider for size vs. fidelity
Compare: side‑by‑side preview with zoom
Save: download the optimized image instantly

Pro tips for best results

Start at 70–85% quality: often the sweet spot
Progressive JPEGs: better perceived loading
Right dimensions: resize to display size before compressing
Check mobile: verify clarity on small screens

FAQ

Do my images ever upload to your servers?

No. All processing happens in your browser on your device.

Will quality suffer?

At 70–85% quality, differences are usually hard to spot. Use zoom to inspect text and edges.

What if compression makes the file bigger?

JPEGMinify automatically returns your original if the result isn’t smaller.

Related Guides

Try JPEGMinify now

Compress a JPEG in seconds — private, fast, and free.

Open JPEGMinify

Compress JPEGs Without Uploading — A Complete Guide