Photo Compressor — Free, Fast & Private
MiniPx is a free photo compressor that reduces image file sizes directly in your browser. Whether you are compressing iPhone photos for email, reducing image sizes for a website, or meeting a specific file size requirement for a form upload — MiniPx handles it instantly without uploading your photos anywhere.
Modern phone cameras produce photos that are 5-15 MB each. A single iPhone 15 Pro photo at 48 megapixels can exceed 10 MB. These sizes are impractical for email (most providers cap attachments at 25 MB total), web pages (large images slow load times), form uploads (government portals often require under 200KB), and messaging apps (WhatsApp compresses aggressively, losing quality).
MiniPx compresses photos by removing visual data that humans cannot perceive — subtle colour differences, high-frequency textures invisible at normal viewing sizes, and redundant pixel patterns. The result: photos that look identical to the original at 50-80% smaller file sizes.
Photo compression presets
Gentle (quality 82%): Preserves maximum detail with 20-40% size reduction. Use for photography portfolios, print-quality images, and any photo where quality is the top priority.
Smart (quality 65%): Best balance with 50-70% reduction and no visible quality loss at normal viewing sizes. Recommended for web use, social media, and general sharing. This is the default for most users.
Tiny (quality 40%): Maximum compression with 75-90% reduction. Best for size-constrained uploads like government forms (50KB) or profile uploads (100KB) where meeting the limit matters more than pixel-perfect quality.
Combining compression with resizing
The most effective approach combines compression with dimension reduction. Most screens display photos at 1920 pixels wide or less. Reducing a 4000px phone photo to 1920px and applying Smart compression typically cuts file size by 80-90% with no visible difference on screen. MiniPx offers max-width options: Original (no resize), 1920px (full HD), 1280px (web standard), and 800px (thumbnails).
Compressing for specific platforms
Different platforms have different requirements. For email attachments, keep individual photos under 1 MB so total attachment size stays under 25 MB. For WhatsApp, compress before sending to avoid WhatsApp's aggressive re-compression which ruins quality. For websites, aim for under 200KB per image to maintain fast page loads.
Why MiniPx is different from other photo compressors
Most online photo compressors (TinyPNG, iLoveIMG, Optimizilla) upload your photos to their servers for processing. Your personal photos travel across the internet and are stored on infrastructure you do not control. MiniPx processes everything client-side — your photos never leave your device. This makes it the only photo compressor suitable for personal memories, identity documents, and confidential images.
Other advantages: no daily quota (TinyPNG’s free web tool takes 20 images per batch, each up to 5MB), no account required, and no waiting in queues. Since compression runs locally, it works faster than server-based tools on modern devices. To be exact about our own limits rather than vague: the free tier processes 5 photos per batch and Pro removes that cap, and individual files are accepted up to 200 MB — far above the 5-10 MB most upload-based tools reject at. There is no monthly credit or quota on either tier.
Choosing the right output format
JPEG: Universal choice — works everywhere, smallest files for photographs. Use for sharing and general compatibility.
WebP: 25-35% smaller than JPEG at equivalent quality. Ideal for web publishing and modern platforms.
AVIF: Smallest files (50% smaller than JPEG) with excellent quality. Requires newer browsers and apps.
For iPhone users: your photos may be in HEIC format. Use the HEIC to JPG converter or let MiniPx handle both conversion and compression in one step — it accepts HEIC files directly.