Upload as many images as you like and turn them into a single 1080p MP4 slideshow at 25fps — perfect for a TV running family photos in the background. Set a global duration per image, choose between crop (fill) or contain (letterbox) for portraits and landscapes mixed together, pick a transition (instant, fade, or fade to black), and choose landscape (16:9) or portrait (9:16) orientation. Reorder images with up/down buttons or remove individual photos before rendering. Encoding runs locally in your browser with FFmpeg.wasm — your photos never leave your device.
TonniTools is built to run locally in your browser. Since no data ever leaves your device, everything works, even without internet.