CABOKIT TOOLKIT
Free Local Image
Compressor
No files uploaded to servers — 100% private, free, and unlimited. Compress in your browser, then download ZIP.
100% LOCAL PIPELINE
Batch compress · keep 2K/4K · zip in-browser
Web Worker concurrency with no backend server. Built for indie sites and ecommerce product-image batches.
Only resizes if longer than this. Most photos are already smaller — size often barely changes here; use Quality / Exact size instead.
Fixed for this converter. Homepage can switch formats.
Tip: Max edge keeps 2K/4K fidelity—it won't shrink small images. To force a smaller file, lower Quality or switch to Exact size.
FROM THE AUTHOR
Hi, I built this tool
If you like this no-login, ad-free experience, check out my other focused apps. Need it in your company workflow (Discord Bot / internal chat)? Ask me for a private script.
NO UPLOAD & 100% SECURE
Compress Images · Keep Original Format
Output format is locked to “keep original”—extensions stay the same while you compress quality and max edge. Perfect when you only want smaller files, not a format change.
What this page actually does
Compress without changing format
JPEG stays JPEG · PNG stays PNG
Batch optimize + ZIP locally
FAQ
- Can I switch away from Keep original on this page?
- No. This converter is locked to Keep original. Use the homepage if you need to pick JPEG, PNG, WebP, or keep the original format.
- Are my images uploaded to a server?
- No. Conversion runs entirely in your browser with Web Workers—files never leave your device.
- Can I convert a whole batch at once?
- Yes. Drop multiple images, convert locally with concurrent workers, then download a ZIP in one click.
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