Image Compressor
Reduce image file size with lossless quality, exact KB target mode, and multi-file batch ZIP download.
Drop your image here
Drag & drop single photo for Studio Mode, or multiple photos for 1-Click Batch Processing
Your images stay on your device
Processing happens 100% locally in your browser. Files are never uploaded to any cloud server.
How to use this tool
Select or Drop Images
Upload single or multiple images (JPG, PNG, WebP) or paste from clipboard.
Choose Compression Mode
Use the visual quality slider or type an exact target file size in KB (e.g. 200 KB).
Download Image or ZIP
Download your compressed image instantly or export all batch files in a single ZIP.
Why use Image Toolkit?
Exact Target Size (KB) Mode
Set an exact maximum file size threshold (e.g. 200 KB) for strict passport, visa, or job application forms.
Multi-File Batch ZIP Archive
Compress dozens of photos at once and download everything in one organized .zip file.
100% Private & Local
Your photos never leave your device. All compression happens directly in your browser.
How Image Compressor Works in Your Browser
Unlike conventional online conversion websites that upload your files to remote cloud servers, Lumino processes your media 100% client-side inside your browser sandbox using modern WebAssembly (WASM), WebGPU, and the HTML5 Canvas 2D API.
This means your sensitive photos, identity cards, passport scans, and proprietary design files are processed directly on your local device hardware (RAM/GPU) and are never transmitted across the internet.
Everything You Need to Know
Clear answers on privacy, security, file limits, and image quality.
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