Starting Frame.
Struna — free video editing, in a browser tab

A free video editor that leaves no watermark.

Struna cuts video in a browser tab. Trim, split and reorder your clips, drop b-roll over the top, add music, subtitles and animated graphics, then export an MP4 that imports straight into DaVinci Resolve. Nothing is uploaded — your footage is read off your own machine and never reaches our servers. No watermark, ever.

Open Struna free More from Starting Frame

Free · no sign-up · no watermark · runs in your browser

Beta, and desktop Chrome or Edge only. It reads your files locally, so a long export takes real time on a slow machine.

The film

See the tool in action.

What it does.

Cut, trim, reorder

Drop clips on the timeline and split them where the playhead is. Drag to move, drag an edge to trim, and the timeline closes the gap itself so a cut can never leave you a black frame. B-roll gets its own lane above the video and cuts the same way.

Music, subtitles and looks

Lay a music bed under the whole thing and fade it. Load an .srt or .vtt and the subtitles burn in — positioned, sized, and readable over busy footage. Four look dials grade the shot without turning it into a colour session.

Graphics that stay editable

Nine animated graphics across intros, outros, headlines, lower thirds and info boxes, plus two full-frame wipes — text you can retype at any point, in your own brand colours and logo. They are drawn live on the same canvas as the video, not baked into a file you have to re-render.

An export that actually imports

A flat H.264 MP4 at 16:9, 9:16, 1:1 or 4:5, with sound. Verified importing into DaVinci Resolve — the fragmented MP4 most browser tools produce is exactly what an editor refuses, and this is not one.

THE REST OF THE SHELF

The rest of the shelf.

BEFORE THE EDIT Run the show. Next builds the rundown and Just Read It drives the read — the day of the shoot, not the week after. See it THE SHELF Everything else. Blender add-ons, free material packs, and the connectors that get a Blender camera into Resolve. See it

Questions.

Is it really free, and is there a watermark?

It is free to use and there is no watermark on anything you export — that is a rule here, not a trial limit. You do not need an account to edit and export. Signing in is free too, and only matters if you want to save a project to your own cloud storage.

Does my video get uploaded anywhere?

No. Struna reads your files locally in the browser and the video never reaches our servers — there is nowhere for us to keep it. If you save a project, what is stored is a roughly one-kilobyte list of your edit decisions in your own Drive, Dropbox or OneDrive. The footage stays yours.

What browsers does it work in?

Desktop Chrome or Edge. It leans on WebCodecs to encode video and Safari does not support the parts it needs, so it is not supported there — we would rather say so than let you find out at the export.

Can I use it on a phone or iPad?

It opens on an iPad, but it is built for a mouse and a keyboard and we do not call it a mobile editor. On a phone you are told to come back on a computer. A real mobile version would be an app you install, not this.

How long does an export take?

It depends far more on what is on the timeline than on how long it is. A graphics-led clip can export faster than real time; footage with b-roll over it runs slower than watching it, because every frame has to be decoded twice. Thirty seconds of intro, outro and kinetic type exported in six.

Does it save my work?

You can save a project to your own cloud and reopen it. Because the video itself is never uploaded, reopening asks you to point at your clips again — the same relink any editor does. Every cut, graphic, subtitle and look comes back with it.

Which cameras and formats has it been tested with?

Real files from a Sony α7 V, α7S III, FX3, α6600 and α7S II, a Canon EOS R5 (8K) and EOS-1D X Mark III, a Panasonic Lumix GH5 II, a Fujifilm X-T3 and GFX100, and an iPhone 16 Pro Max — H.264 and HEVC, 8-bit and 10-bit, 4:2:0 and 4:2:2, up to 8K — each opened, played and exported. HDR from a phone converts on the way in; S-Log3 is a pick in the clip’s colour menu. ProRes and RAW don’t open yet — convert those to MP4 first. The full list, with what each file was, is in <a href="/guide/struna.html#tested">the guide</a>.

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Open Struna free.

Free, in your browser — no sign-up. When you're ready for the production tools — a teleprompter and a live run-of-show — there's a membership for that.

Open Struna free See membership · 14-day free trial

The free tools are free forever. The Starting Frame membership (14-day trial) adds Next (live run-of-show) and the saved-scripts library in Just Read It. The free tools stay free either way.