Free Image Compressor
Reduce image file size by up to 80% while maintaining visual quality. Optimize PNG, JPG, and WebP images instantly in your browser. No upload required — 100% private and secure.
Compress Images
JPG, PNG, WebP supported
Why Compress Images?
Image optimization is critical for modern web performance and user experience
Faster Website Loading
Large images are the #1 cause of slow page load times. Compressed images load 3-5x faster, improving your Core Web Vitals scores and SEO rankings.
Mobile-Friendly
Mobile users often have limited data plans. Smaller images mean faster loading on 4G/5G networks and reduced data consumption.
Lower Hosting Costs
Smaller images reduce bandwidth consumption and storage requirements. This translates to lower hosting bills and faster CDN delivery.
Better SEO
Page speed is a confirmed Google ranking factor. Optimized images improve your Lighthouse scores, Core Web Vitals, and overall search engine rankings.
Email Attachments
Most email services limit attachment sizes to 25MB. Compress images before sending to avoid rejection errors.
Social Media
Platforms like Instagram and Facebook compress images on upload. Pre-compressing gives you control over quality.
How Image Compression Works
Understanding the technology behind efficient image optimization
File Analysis
Your browser reads the image file and decodes it into raw pixel data. The algorithm analyzes color distribution and complexity.
Smart Compression
Advanced algorithms reduce file size by removing invisible data, optimizing color palettes, and applying intelligent lossy compression.
Quality Control
The compression engine balances file size reduction with perceived quality. You control the quality slider.
Export
The optimized image is encoded in your chosen format and downloaded directly to your device. No server ever sees your files.
Image Compression Best Practices
📐 Choose the Right Format
JPG/JPEG: Best for photographs and images with many colors. Supports lossy compression for small file sizes.
PNG: Ideal for graphics, logos, screenshots, and images requiring transparency. Supports alpha channel.
WebP: Modern format with superior compression. Up to 30% smaller than JPG/PNG with similar quality.
🎚️ Quality Settings Guide
90-100%: Near-lossless quality. Use for hero images, product photos. Only 10-20% size reduction.
75-85%: Optimal balance. Recommended for most web images. 50-70% size reduction. This is the sweet spot.
60-70%: Aggressive compression. Good for thumbnails and background images. Minor quality degradation.
<60%: Extreme compression. Only use for non-critical images. Visible compression artifacts.
📏 Resolution & Dimensions
Don't upload images larger than needed. If your website displays images at 800px width, there's no benefit to uploading 4000px originals.
- Hero images: 1920-2560px width
- Product images: 800-1200px width
- Thumbnails: 300-400px width
- Blog images: 1000-1400px width
🔄 When to Use Each Method
Lossless Compression: Reduces file size without quality loss. Use for archival or when quality cannot be compromised. Smaller savings (10-30%).
Lossy Compression: Removes imperceptible visual information for dramatic size reductions (60-80%). Use for web images and general content.
Frequently Asked Questions
Is this image compressor really free?
Yes, 100% free forever. There are no hidden costs, premium tiers, or usage limits. All processing happens in your browser.
Are my images safe and private?
Absolutely. Unlike other online compressors, your images never leave your device. All compression happens locally in your browser.
What's the difference between lossy and lossless compression?
Lossless compresses files without removing any visual information. Lossy removes imperceptible details to achieve much smaller files.
Will compression reduce image quality?
At quality levels above 75%, most people cannot see any difference from the original. You have full control via the quality slider.
Should I use JPG, PNG, or WebP?
JPG for photos, PNG for graphics with transparency, WebP for optimal performance (30% smaller with similar quality).
How much smaller will my images be?
Typical results: PNG→WebP at 80%: 60-80% reduction. JPG→JPG at 80%: 40-60% reduction. Combining resizing can achieve 90%+ reduction.