How to make a beat edit
1. Song. Choose a song file (MP3, WAV, M4A, OGG or FLAC). The page listens to it, finds the tempo in beats per minute, and marks every beat. Pick the part you want with Start and Length; the highlighted part of the waveform is what the video uses, and each line in it is a cut.
2. Photos and clips. Add as many photos and video clips as you like. They play in the order you added them (use ← to move one earlier), or press Shuffle. If there are more cuts than pictures, they repeat. A clip carries on from where it stopped the last time it was shown, so long clips don’t show the same second over and over.
3. Look. Pick the shape (9:16 for Reels, TikTok and Shorts; 4:5 or 1:1 for feed posts; 16:9 for YouTube), and the effects: a small zoom on every beat, a slow zoom on photos, and a white flash on each cut. Press Play preview to watch it with the music, then Make the video. Recording happens in real time, so a 30-second edit takes 30 seconds; keep the tab open and in front while it records.
Getting the cuts right
Cut sets how often the picture changes: every beat is fast and energetic, every 2 or 4 beats suits most songs, every 8 is calm. On hits ignores the tempo and cuts on the loudest drum hits instead. If the cuts feel twice too fast or slow, press ½ or ×2: songs are often heard at half or double the tempo a program finds. If they land slightly early or late, move Nudge a little. You can also type a tempo you know.
Questions
Are my song and pictures uploaded? No. Everything is read, cut and recorded inside your browser. Why is my video WebM? Browsers record in the format they support; Safari and newer Chrome make MP4, others make WebM, which most apps accept. Can I use any song? The page works with any file you have, but posting a song you don’t have the rights to can get a video muted or removed; the apps’ own music libraries are the safe choice for posting. Why does it stutter on my phone? Try 720p and fewer long clips; phones decode one video at a time best.