Free image optimizer

Reduce image file size for faster websites, smaller emails, and quicker uploads — without visible quality loss.

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Smart preset balances quality and file size

Image Optimizer — Free, Fast & Private

Image optimization means reducing file size while keeping images looking good. MiniPx does this by combining smart compression with optional dimension reduction — the two most effective techniques for shrinking images.

For websites, optimized images load faster, improve Core Web Vitals scores, and reduce bandwidth costs. A typical unoptimized hero image at 2-5MB can be reduced to 100-300KB with no visible difference on screen.

The Smart preset in MiniPx is designed for this exact use case. It applies moderate compression that preserves visual quality while cutting file size by 60-80%. For more aggressive optimization, the Tiny preset pushes compression further.

MiniPx processes images entirely in your browser. Unlike cloud-based optimizers, your images are never uploaded to any server. This makes it safe for optimizing product photos, client assets, and sensitive documents.

Batch optimization handles multiple images at once — upload an entire folder of product photos and optimize them all with consistent settings. Each file shows its original and optimized size so you can verify the results.

How it works

Upload images: Add one or more images you want to optimize. JPG, PNG, and WebP are all supported.
Choose optimization level: Smart preset for balanced optimization. Tiny for maximum compression. Gentle for minimal quality impact.
Set max width if needed: For web images, 1920px covers full-width screens. 1280px is ideal for blog content. 800px for thumbnails.
Download optimized images: Check the file size reduction shown for each image, then download individually or as a batch.

Frequently asked questions

What is image optimization?

Image optimization reduces file size while preserving visual quality. It combines compression (removing data the eye cannot see) with dimension reduction (matching image size to display size). The result is smaller files that load faster.

Does optimization reduce image quality?

With the Smart preset, quality loss is imperceptible to the human eye. The Tiny preset produces noticeably smaller files with minor quality trade-offs that are acceptable for most web and document use cases.

Which format produces the smallest files?

WebP produces the smallest files for photographs — typically 25-35% smaller than JPG at the same visual quality. JPG is the most universally compatible. PNG should only be used when you need transparency.

How much can images be optimized?

Typical results: a 3MB phone photo optimizes to 200-400KB (85-93% reduction). A 500KB web image optimizes to 80-150KB (70-84% reduction). Results vary based on image content and format.

Is MiniPx safe for client work?

Yes. MiniPx processes everything in your browser — images never leave your device. No account required, no data stored. This is the most private way to optimize images for professional use.

Can I optimize images for WordPress?

Yes. Use the Smart preset with 1920px max width for full-width images, or 1280px for content images. Save as WebP if your WordPress theme supports it, otherwise use JPG.