Are my pictures uploaded to a remote server for compression?

No. All compression happens locally on your computer or phone using Web Workers inside your browser. Your images never leave your device.

Will compressing images make them look blurry or pixelated?

No. The compressor applies intelligent lossy and lossless algorithms designed to remove unnecessary byte data while keeping the photo sharp and clear to the human eye.

Can I compress multiple images simultaneously?

Yes. You can select dozens of images at once, apply your target quality setting, and batch download the compressed results as a single ZIP archive.

Which image formats does the compressor support?

You can compress and convert between all standard web formats including JPEG, PNG, WebP, AVIF, and GIF.

Image Compressor

Compress JPEG, PNG, WebP, and AVIF images online for free. Reduce image file size by up to 80% locally in your browser with zero quality loss.

Select your file here to get started

or drop your file here.

.jpg.jpeg.png.webp.heic.heif.gif.bmp.svg.tiff.tif

Max 2000MB. 100% Private. Files never leave your device.

What to expect

Experience fast, secure, and completely private processing directly inside your web browser.

Significant Size Reduction

Cut file sizes by up to 80% while retaining crisp visual resolution.

Rapid Batch Optimization

Process dozens of photos locally in seconds without upload wait times.

Strict Data Protection

Keep sensitive graphics, invoices, and personal photos safe on your own device.

How it works

Simply upload your content, adjust your settings, and download the result instantly.

Add Your Images

Drag and drop one or multiple pictures into the local browser compressor.

Choose Compression Level

Pick a quality preset or adjust the slider to balance visual clarity and file size.

Download Optimized Files

Save your smaller images individually or download all files together in a ZIP file.

Frequently Asked Questions

Get quick answers about supported formats, data privacy, and using this tool.

Image Compressor - Compress JPEG, PNG, WebP, and AVIF images online for free. Reduce image file size by up to 80% locally in your browser with zero quality loss.

About This Tool

Shrink bulky image files without sacrificing visible detail. Whether you need faster website load speeds, smaller attachments for email, or optimized assets for mobile applications, this client-side compressor reduces JPEG, PNG, WebP, and AVIF file sizes by up to 80%. Traditional online image optimizers upload your files to remote cloud queues, creating slow turnaround times and serious privacy concerns for personal or company assets. Our compressor uses modern browser Web Workers to process images directly on your device. Your pictures stay on your computer, compress in fractions of a second, and never consume upload bandwidth. Take complete control over your compression settings. Toggle between intuitive quality presets or dial in custom dimensions and compression ratios to match your exact performance requirements. Compress dozens of images at once and download them in a convenient ZIP package.

image compressorphoto optimizerreduce file sizewebp converterimage tools

100% Open Source & Trustworthy

Every tool on PrivateTools is fully open source and runs entirely in your browser. No server uploads. No tracking. No hidden code. You can verify the source code yourself on GitHub at any time.

Open Source Code

Full source code available on GitHub — inspect, fork, or contribute.

Verify & Audit

Read every line of code. Nothing is hidden. Total transparency.

Browser-Local Processing

Files never leave your device. Zero server uploads. 100% private.

Community & Support

PrivateTools is built by the community, for the community. Found a bug? Have a tool idea? Want to report an issue? We'd love to hear from you. Every contribution makes these tools better for everyone.