Precision image optimization, completely local.
PixelKit is an ultra-fast browser utility for compressing to strict file-size targets, resizing with aspect-ratio locks, and transcoding between JPEG, PNG, and WebP.
Drop your image here, or browse
Supports JPG, PNG, and WebP up to 8192px.
Available Image Tools
Engineered with strict invariant checks and hardware safety safeguards.
Image Compressor
Compress JPG, PNG, and WebP images to exact target file sizes (20KB, 50KB, 100KB) with strict mathematical size guarantees.
Image Resizer
Scale pixel dimensions with strict aspect-ratio locks, presets, and hardware safety limits up to 8192px.
Image Converter
Transcode between JPEG, PNG, and WebP with configurable alpha-channel flattening and background fill.
Engineered for Complete Privacy & Zero Latency
No Cloud Uploads
Your images never travel over the network. All compression, resizing, and transcoding execute in isolated Web Canvas contexts inside your device.
Strict Invariant Protection
Target file sizes use a bounded 7-step bisection algorithm with strict ceiling guarantees. PixelKit never returns a file larger than your target KB.
Hardware Memory Safeguards
Safe dimension limits prevent browser crashes from multi-gigapixel files, with active memory warning indicators for high-resolution images.