Is CompJPG really free?

Yes, CompJPG is completely free to use with no hidden charges, no sign-up required, and no limits on the number of compressions.

How many images can I compress at once?

You can compress up to 20 JPEG/JPG images in a single batch. Each file can be up to 30 MB.

What's the difference between Quality mode and File Size mode?

Quality mode lets you set a JPEG quality percentage (10-100%). File Size mode lets you specify a target file size in KB, and the tool automatically finds the best quality setting to hit that target.

Compress JPEG Images — Free & Private

Reduce JPEG and JPG file sizes instantly in your browser. No uploads to any server. Set a target quality or target file size. Batch compress up to 20 images at once.

🔒 100% In-Browser · Files Never Leave Your Device

How It Works

Drop or select up to 20 JPEG/JPG files
Choose Quality mode (10–100% slider) or File Size mode (target in KB)
Click "Compress" and watch the green progress rings fill
Download individual files or a ZIP of all compressed images

Features

🎚️ Quality Mode — set JPEG quality with a slider (10–100%)
📦 File Size Mode — enter target size in KB, auto-compression
🖼️ Before/After Slider — visual quality comparison for single images
📁 Batch Processing — compress up to 20 files simultaneously
📥 ZIP Download — download all compressed files in one click
🔒 100% Private — nothing uploaded, everything stays local
⚡ Fast — powered by native browser Canvas API and Web Workers

Frequently Asked Questions

Is CompJPG free?

Yes, completely free. No sign-up, no payment, no hidden charges.

Are my images uploaded to a server?

No. All compression runs in your browser. Your images never leave your device.

What file types are supported?

JPEG and JPG files, up to 30 MB each. Up to 20 files per batch.

What browsers are supported?

All modern browsers — Chrome, Firefox, Edge, Safari, Opera, and Brave.

Learn More

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