How to use it
- Add your videos and put them in order (drag the cards or use ↑ ↓).
- Click a clip to trim, split, change speed and choose the transition to the next one.
- Optionally add a video overlay, music, captions, your logo, a watermark and text labels.
- Pick a format (9:16 for Reels) and click Export MP4.
What people use it for
- AI clips into one Reel. Short videos from Flow, Veo or Runway (5–8 s each) stitched in order with fades — speed up the slow bit, slow down the beautiful moment.
- Logo, watermark and labels. Your logo in a corner (the whole video, only at the start or only at the end), a subtle watermark and labels like “New single” at the right second. The logo can be remembered on this device.
- Accessible video with ASL. The interpreter shows up in a corner, at the size you choose, from the right second. Filmed on a green screen? The background goes away.
- Captions for sound-off viewers. Type lines with timings or import an .srt. Captions are burned into the video.
- Music bed. Add a track with fade in and out, and turn down the original sound of the clips.
Limits (so you’re not caught out)
- Built for short videos: up to 1–2 minutes works well on a computer. On a phone it’s slower and very large files may fail.
- “Fast” (720p) takes roughly twice the video length on a computer; “high” (1080p) longer.
- Your project is saved only in this browser on this device (videos included) and comes back when you reopen the page. On another device or browser you start fresh. Very large videos may not fit in the browser’s storage: the page tells you, and it’s best to download the MP4 before closing the tab.
- Input: MP4, MOV, WebM; output: MP4 (H.264 + AAC), what Instagram, TikTok and YouTube expect.
FAQ
Are my videos uploaded?
No. Editing and exporting run in your browser. The first time, your browser downloads the video engine (FFmpeg) from tudukit itself.
Free? Watermark?
Free and no account. tudukit adds no watermark; you can add your own (section 5).
Can I speed up only part of a clip?
Yes: split the clip at that point (“✂ Split here”) and change the speed of just that piece, from 0.25× to 4×. Audio follows without chipmunk voices.
Why don’t I see the transition in the preview?
The preview is simplified to stay fast. Transitions are rendered on export.
What engine does it use?
FFmpeg compiled to WebAssembly (ffmpeg.wasm, GPL licence). Sources and licences via the link below the tool.