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JPG uses lossy compression to reduce photos 50-70% at 80% quality. PNG uses lossless optimization reducing graphics 30-60% with zero quality loss. WebP combines both approaches for 25-35% better compression than JPG.
Adjust compression from 1-100% quality. See file size reduction in real-time. 80% quality removes artifacts invisible to human eye. 70% for web thumbnails. 90%+ for print or professional use. Test until you find optimal balance.
Reduce email attachment sizes (most services limit 25MB). Speed up website load times (Google ranks faster sites higher). Meet platform upload limits (Slack 10MB, WhatsApp 16MB). Save cloud storage space. Optimize for mobile data.
JPG: Removes invisible high-frequency data, optimizes DCT coefficients. PNG: Strips unnecessary metadata, recompresses with better algorithms (ZLIB/Deflate). WebP: Modern codec balancing quality and size. Choose format based on image type—photos (JPG), graphics/text (PNG), web optimization (WebP).
No daily limits, file count restrictions, or watermarks. Compress 1 image or 1,000 images—entirely free. Processing speed depends only on your device hardware. Most images compress in under 2 seconds.
Your images are processed entirely client-side. No uploads occur to any server—we have zero access to your files. Verify privacy by opening browser DevTools (F12) → Network tab → process an image → observe zero upload requests. Works offline after initial page load by caching tool code. Perfect for sensitive work: medical images, legal documents, confidential client materials, personal photos. Your files, your device, your privacy.
80% quality for general web use—reduces size 50-60% with imperceptible quality loss. 70% for thumbnails, social media, or aggressive compression where slight artifacts acceptable. 85-90% for professional photography, print materials, or client deliverables. 95%+ when archiving originals with minor size reduction. Test different settings and zoom to 100% to check detail preservation.
Depends on image type. Photos: JPG compresses best (lossy removes invisible data). Graphics with flat colors, text, or transparency: PNG compresses best (lossless preserves sharp edges). Web optimization: WebP beats both by 25-35% but limited browser support (95% modern browsers, fails on IE11). For universal compatibility, use JPG for photos, PNG for graphics.
Image may already be compressed. JPGs from phones/cameras are pre-compressed at 85-95% quality. Re-compressing loses minimal size unless you drop quality significantly. PNGs from design software may already be optimized. Check original file metadata (EXIF) for compression info. For heavily pre-compressed images, try format conversion (PNG→JPG for photos) instead.
PNG: Yes, infinite recompression (lossless algorithm). JPG/WebP: No—each compression compounds artifacts and degrades quality. If you need multiple versions, always compress from original high-quality source. Never compress a compressed JPG. Save originals separately before compression.
JPG uses DCT (Discrete Cosine Transform) to convert image into frequency data. Compression discards high-frequency details human eyes barely perceive. At 80% quality, removes ~20% of data mostly from subtle color gradients. Below 60%, visible blocking artifacts appear. PNG avoids this by using lossless Deflate algorithm—no data discarded, just better packed.
Yes. Canvas-based processing strips all metadata including EXIF, GPS coordinates, camera settings, copyright info. This is actually a privacy feature—prevents location tracking and metadata leaks. If you need to preserve EXIF (for professional photography), use specialized tools. For privacy-conscious users, this automatic stripping is a benefit.
Similar algorithms but different implementation. Photoshop uses proprietary optimization, we use open-source browser APIs. Quality 80% here ≈ Photoshop 'High' preset. Main advantage: instant browser-based processing vs launching Photoshop. Disadvantage: less control over advanced options (chroma subsampling, progressive encoding). For batch processing hundreds of files, Photoshop faster. For quick 1-10 images, we're faster.
Massively. Google PageSpeed penalizes images over 100KB. Compressing hero image from 2MB → 400KB can improve score by 15-25 points. Lazy-loading compressed images reduces initial page load from 5s → 1.5s on mobile. Every 1-second delay costs 7% conversions. For e-commerce, compressing all product images is critical for Core Web Vitals and search ranking.
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