Show HN: YuliusBox – 26 free tools that run in the browser

YuliusBox launched as a free browser-based suite of 26 tools that process files locally on the user's device using WebAssembly, the Canvas API, and on-device AI models such as Whisper, with no uploads, accounts, or tracking. The tools include image compression for JPG, PNG and WebP, PDF merging, video-to-GIF conversion, Excel formula generation, screenshot beautification, and audio transcription, and all core tools are free with no watermarks and continue working offline once the page loads.

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. 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.