Make a beat-synced TikTok in your browser.
Drop a clip. Drop a sound. Hit "snap to beat". Cutflux locks every cut to the music using a real beat tracker, then exports 1080×1920 vertical, ready to upload. Free. No login. No watermark.
The 4-step workflow
Drop your clips
Drag raw clips from your phone or desktop into the timeline. Cutflux doesn't upload, everything runs in your browser.
mp4 · mov · webmDrop the audio
Drag in the trending sound. Cutflux runs a dynamic-programming beat tracker and maps every onset, kick, snare, snap, drop.
mp3 · wav · m4aSnap to beat
Hit Snap-to-Beat. Every cut snaps to the nearest detected beat. No drifting frames, no manual marker pushing.
1-clickExport 1080×1920
Vertical preset, MP4 H.264. Watermark-free download. Upload straight to TikTok.
1080×1920Export presets for TikTok
Trending TikTok sounds this week
Updated week of 2026-06-16. Drop any of these into Cutflux and let the beat tracker do the rest.
Why a real beat tracker matters
Beats aren't on a grid
Real songs have micro-timing, push and pull around the beat. Snapping to a metronome grid creates the "off" feeling. Cutflux detects actual onsets.
Drops feel locked
The drop is what viewers wait for. Cutting on the drop instead of one frame off is the difference between a viral edit and a forgettable one.
No manual markering
You don't have to tap M repeatedly through the song. Detection runs in one pass and the markers appear pre-placed.
Frequently asked
What is the best free TikTok video editor?
For browser-based beat-sync editing: Cutflux. For mobile-first editing: CapCut Free (note: the 2026 Pro restructure paywalled the AI features). For pro desktop work: DaVinci Resolve free.
What size should I export for TikTok?
1080×1920 vertical, MP4 H.264, under 287 MB or 60 minutes. Cutflux exports this preset by default.
How do I sync video cuts to the beat of a trending sound?
Drop the audio into Cutflux. The beat tracker maps every onset. Then drop your clips and hit Snap-to-Beat, every cut snaps to the nearest detected beat.
Will TikTok detect the audio if I edit it in Cutflux?
Yes. TikTok's auto-detect identifies the song from the audio fingerprint, not from your editor. Export with the original audio and you keep the sound attribution.
Can I add captions in Cutflux?
Yes. The editor supports captions and the Lyric Punch-Out tool generates kinetic typography that snaps to the beat.
Does Cutflux work on mobile?
The full editor is desktop-first. Several tool pages (Beat Finder, SFX Playground) work on mobile browsers, handy for prepping a soundtrack on the phone before editing on desktop.