100% Private
Your images never leave your device. Everything runs in your browser — no uploads, no cloud, no server.
Blazing Fast
No round trips to a server. Processing starts instantly and finishes in seconds, even for large images.
No Nonsense
Core features are free to use. No watermarks on your output. Your images are never tracked or uploaded. Optional accounts and premium features may be added in the future.
Our Mission
SizeinKB Image Tool was built with a single philosophy: your tools should work for you, not against you. In an era where most "free" tools harvest your data, process your private photos on remote servers, and push you toward paid plans — we wanted to build something genuinely different.
We believe that image processing is a basic utility, and utilities shouldn't come with privacy trade-offs. So everything runs in your browser — the moment you close the tab, your image data is gone. We may introduce optional accounts in the future for features like saved presets, but your image processing will always stay private and on-device.
What We Built
SizeinKB Image Tool offers two modes:
- Simple Mode — drop an image, pick a target file size, download. Done in three clicks. Perfect for everyday use: social media, email attachments, web uploads.
- Advanced Mode — full control over dimensions, quality, format (JPEG / PNG / WebP), and more. Built for developers, designers, and photographers who need precision.
Both modes support PDF export, clipboard paste, drag-and-drop, and light/dark themes.
Technology
The tool is built with Astro for fast static delivery and vanilla JavaScript for the image engine. All compression and format conversion uses the browser's native Canvas API — no third-party libraries, no WASM blobs, no dependencies that could phone home.
Get in Touch
Have a feature request, found a bug, or just want to say hi? We'd love to hear from you. Head to the Contact page.