Image Compressor
Shrink JPG, PNG & WebP photos with no visible quality loss.
Your files never leave your device. Compress images, merge PDFs, convert video to GIF, generate Excel formulas, beautify screenshots, and transcribe audio — no uploads, no accounts, no tracking.
Shrink JPG, PNG & WebP photos with no visible quality loss.
Merge multiple PDFs into one, or shrink oversized files.
Turn MP4 and MOV clips into GIFs — no watermark.
Describe the calculation in plain English; AI writes the formula.
Browser frames, gradients, and shadows for your screenshots.
Whisper AI transcription that runs 100% on your device.
Every YuliusBox tool runs on your device using modern browser technology — WebAssembly, the Canvas API, and on-device AI models like Whisper. When you drop a file into a tool, it is processed by your own CPU and GPU; nothing is sent to a server, stored in a database, or logged. That means no queues, no file-size quotas imposed by server costs, and no privacy trade-offs — your tools even keep working offline once the page has loaded.
Files are processed on your device and never sent to a server.
Every tool works instantly. No accounts, no email walls.
All core tools are free to use, with no watermarks.