Struna cuts video in a browser tab. Trim and split your clips, drop b-roll over the top, add music, subtitles and animated graphics, then export an MP4 that imports straight into DaVinci Resolve. No watermark, and your footage never leaves your machine.
Struna encodes video with WebCodecs, which Safari does not support the way this needs. It will tell you up front rather than let you find out at the export. It opens on an iPad, but it is built for a mouse and a keyboard — on a phone you are asked to come back on a computer.
It works end to end — people have cut and exported real videos with it — but it is new, and you should keep your source files where they are.
Your video is read off your own machine, in the browser. It never reaches our servers, so there is nowhere for us to keep it. That is also why reopening a saved project asks you to point at your clips again.
Drag a video onto the window, or use Add. It lands on the timeline and the picture appears. The shape of the edit starts out matching your footage.
Every clip you add joins the end of the track. Drag a clip to move it and the timeline closes the gap behind it — there is no way to leave a hole that plays as black.
Put the playhead where you want the cut and press Split, or the S key. The clip becomes two you can move, trim or delete separately.
Drag the left or right edge of a clip to shorten it. Drag the middle to move it. The rest of the timeline follows.
Every edit is undoable, including deleting the last clip. A whole drag counts as one step, not fifty.
Use the graphics button to add a video or image as b-roll and it sits on its own lane above your footage, covering it for as long as it lasts. Dropping a file straight onto the timeline makes it a clip instead — the door you use is what decides.
Drag it on the picture to reposition, scale it down for a picture-in-picture, and drag its edges on the lane to change when it starts and ends. Select it and press Split to cut it in half — the second piece carries on from where the first stopped, it does not start over.
Add a music file and it appears on its own track. Drag it to set where it starts, drag its edges to shorten it, and pull the corners in to fade it up or down.
Each clip has its own volume and a mute, so you can silence a noisy take without touching the rest. Muting your footage leaves the music playing.
Load a subtitle file and the lines burn into the video on their own timings. Set the size and whether they sit at the top, middle or bottom. They are drawn on a soft plate so they stay readable over busy footage.
It reads a subtitle file you already have — there is no speech recognition in it and nothing is sent anywhere to be analysed. You can also export just the audio to run through whatever transcriber you already trust, then load the file it gives you back.
Intro and Outro cards, Headlines (kinetic type, big word, news bar), Lower thirds (four styles) and Info boxes. Pick one and it lands on the timeline straight away.
The words are data, not a baked-in picture, so you can come back and change them — and the shape behind the words grows to fit what you typed instead of clipping it.
Seven palettes, or set the colours yourself. Signed-in members can save a brand kit — colours, font and logo — and apply it in one click.
An intro card lengthens the video rather than covering the first few seconds of it. Drag its length and the whole edit follows.
Switch the frame at any point. Each clip has its own fill or fit, plus zoom and position, so you can reframe a wide shot for vertical rather than accepting the crop.
Four dials — brightness, contrast, colour, warmth — and a handful of presets. Enough to make a shot sit right, deliberately not a colour session.
Press Export and you get a flat MP4 with sound. It has been checked importing into DaVinci Resolve — the fragmented MP4 most browser tools produce is exactly what an editor refuses, and this is not one.
Nothing is stamped on what you export. That is a rule here, not a trial limit.
It depends far more on what is on the timeline than how long it is. Graphics-led clips can export faster than real time; footage with b-roll over it runs slower, because every frame has to be decoded twice. A very long edit will warn you before it starts.
Sign in free and you can save a project to your own Google Drive, Dropbox or OneDrive. What gets saved is about a kilobyte — the list of your decisions, not your footage.
Because the video was never uploaded, a browser cannot go and find it again by itself. Point at your files once and every cut, graphic, subtitle, look and music setting comes back with them. Imported images and music need adding again — they are files, not decisions.
Space play or pause · S split · ⌘Z undo · ⇧⌘Z redo · ← → nudge a frame · Home back to the start · F full screen. They stand down while you are typing in a text field.
Reload the page with ⇧⌘R. Struna updates often and a browser will happily keep serving you yesterday.
You are in Safari or another browser without WebCodecs. Open it in Chrome or Edge on a computer.
Some formats a camera writes — ProRes in a .mov, for instance — are not something Chrome can decode. Re-export it as a plain H.264 MP4 and it will come straight in.
Ready? Open Struna →