Crunch your files,
not your time.
Never Touch Your Server
Compress, convert, and resize images directly in your browser using WebAssembly. Zero uploads. Zero accounts. Zero cost.
Compress
Up to 80% smallerShrink JPEG, PNG, WebP and AVIF without visible quality loss. Batch up to 10 files.
Convert
JPG↔PNG↔WebP↔AVIFSwitch between any image format in seconds. Batch up to 10 files.
Resize
SNS PresetsResize to exact pixels or pick a social media preset. Batch up to 10 files.
Remove BG
AI PoweredRemove image backgrounds instantly with AI. Download as transparent PNG.
Why Krunkit?
Built for speed, privacy, and simplicity.
Privacy First
Your files never leave your device. All processing happens locally in your browser using WebAssembly — no uploads, no servers, no logs.
Instant Results
Drop an image and results appear in under a second. Powered by the same codecs used in professional tools — mozjpeg, oxipng, libwebp, libavif.
Free Forever
No subscriptions, no watermarks, no file limits. Krunkit is and always will be free for everyone.
Frequently Asked Questions
Is Krunkit really free?
Yes. Krunkit is completely free with no hidden fees, no watermarks, and no usage limits. All processing happens in your browser, so there are no server costs to pass on to you.
Does Krunkit upload my images to a server?
Never. Your files are processed entirely in your browser using WebAssembly. They never leave your device. We have no access to your images.
What image formats does Krunkit support?
Krunkit supports JPEG, PNG, WebP, and AVIF — the four major web image formats. You can compress, convert between any of them, and resize to any dimension or social media preset.
How much can Krunkit reduce my file size?
Compression results vary by image content, but JPEG and WebP images typically see 40–80% reduction in file size with default settings (quality 80). PNG files with many colors compress less, while flat-color graphics can compress dramatically.
Does Krunkit work on mobile?
Yes. Krunkit is fully responsive and works on iOS and Android browsers. WebAssembly is supported on all modern mobile browsers.
Can I process multiple images at once?
Yes. All three tools — Compress, Convert, and Resize — support batch processing for up to 10 images at once. You can also paste images directly from your clipboard. When your batch is done, download files individually or as a single ZIP.
How do I paste an image from my clipboard?
Just copy an image (or take a screenshot) and press Ctrl+V (Cmd+V on Mac) anywhere on a tool page. Krunkit will detect the pasted image and start processing automatically.