🗜️ Compress Image Online Free: Reduce JPG/PNG 80% Lossless

Optimize your photo weight for web or email keeping visual sharpness. 100% private WASM tech: your photos never leave your browser.

🔒 100% Private (No uploads)

⚡ Instant Processing

💯 No Watermark

📱 Mobile Friendly

📋 Setup

Tool Setup Guide

3 simple steps to finish

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Upload your images

Drag and drop your JPG, PNG or WebP files. You can select up to 100 images at once.

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Adjust quality

Slide to choose compression level. 85% is the sweet spot for most photos.

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Download instantly

Click "Compress" and download optimized images in seconds. Multiple files delivered in ZIP.

Tool Capabilities

Secure and fast multimedia editing

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Total Privacy

Your images NEVER leave your device. All processing happens locally in your browser.

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Lightning Fast

No upload or download wait times. Compression is instant.

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Optimal Quality

Our algorithm finds the perfect balance: maximum compression with minimum visible loss.

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100% Free

No premium plans, no hidden limits, no watermarks. Free forever.

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Multi-Platform

Works on any device: Windows, Mac, Linux, iOS, Android. You only need a browser.

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Batch Processing

Compress up to 100 images at once. Download all in a ZIP file with one click.

Educational Resources

In-depth information about media formats

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Shielded Privacy: Dune Safe™

Unlike other compressors, we use WebAssembly (WASM) to process images using your device's CPU. This guarantees that your personal photos or sensitive documents are never sent to an external server.

Bank-grade security: your files never leave your control.

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Your files never leave your device.

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Smart Perceptual Compression

Our engine analyzes the image to identify redundant patterns the human eye cannot perceive. By removing this 'invisible' data, we manage to reduce the file by 80% while maintaining a visual appearance identical to the original.

Reduction from 5MB to 500KB without visible changes.

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💡 Key fact: A 5MB photo can be reduced to 500KB (90% less) without you noticing any difference.

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Lossy vs Lossless

We apply Lossy Compression intelligently for JPG/WebP (ideal for photos) and Lossless for PNG (ideal for logos). The automatic 85% setting offers the best quality-to-weight balance on the market.

Adaptive algorithms based on file format.

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🎯 Which to choose? For photos: Lossy JPEG/WebP at 85%. For logos/graphics with sharp edges: Lossless PNG.

Format Comparison

Choose the right format for your use case

Format	Compression Type	Transparency	Typical Reduction	Best For
📸 JPEG / JPG	Lossy (Smart)	❌	60-80%	Photography
🎨 PNG	Lossless / Lossy	✅	30-70%	Logos & Screenshots
🌐 WebP	Modern Hybrid	✅	80-90%	Web Performance
🚀 AVIF	Next-Gen	✅	95%	Future Web

Compression FAQ

Quick answers about the tool

How much can I reduce an image without it looking bad?

The sweet spot is 75-85% quality. In this range, you can reduce file weight up to 80% without the human eye noticing any difference or 'pixelation'. It's the standard used by Facebook and Google.

Why use WebP instead of JPG?

WebP is a modern format created by Google that offers the same quality as a JPG but weighs 30% less. Plus, it supports transparency like PNG. It's the ideal format for fast websites.

Is it safe to use this compressor with private photos?

Absolutely. Thanks to our Local Mode technology, compression happens on your own computer. Unlike other sites, we do not see or store your photos. They are yours and yours alone.

What happens if I compress an already compressed image?

We don't recommend it. Compressing over compressed (re-compression) can generate 'artifacts' or visual noise. Always try to compress from the original maximum quality file for the best result.

Can I compress iPhone HEIC images?

Directly no, browsers don't support HEIC natively for editing yet. We recommend using our HEIC to JPG tool first and then compressing the result if necessary.

Do you maintain my PNG transparency?

Yes, absolutely. Our algorithm respects the alpha channel (transparency). Your logo or cutout will still have the transparent background, but weigh much less.

Does this tool remove EXIF data?

Yes, by default we remove metadata (GPS, camera model) to save an extra 10-15kb and protect your privacy. If you need to see or edit them, use our EXIF Editor.

Is there a limit on quantity or size?

No. Since it's processed on your machine, we don't have server costs. You can compress hundreds of photos at once in Batch mode without paying anything.