Edit video by editing the timeline words.
Lumen transcribes your footage on your own device. Delete a sentence and the video follows. Trim the pauses in one click, then export, upscaled to 4K if you like.
So um, the reason we started Lumen was simple. 2.4s Editing a talk took us like, honestly, longer than recording it. Now we just uh fix the transcript and the cut is done.
Two tools, one private workspace
Both run entirely on your computer's GPU and CPU. Close the tab and nothing is left on a server, because nothing was ever sent to one.
Edit Transcript
Cut video the way you edit a document.
- On-device transcription in 15+ languages
- Select words, press Delete, and the video is cut
- One-click pause trimming and filler removal
- Export MP4 or WebM, plus captions (.srt)
Upscale GPU
Sharper output for any screen.
- 1080p, 2K and 4K in one click
- Edge-aware reconstruction with sharpening
- Before/after preview with zoom
- Audio kept, phone rotation handled
Your footage stays yours
Videos are read and processed in the browser. There is no upload step and no account to create.
Free to export
No watermark and no export limit. Your computer does the work, so there is nothing to meter.
Fast on your hardware
Speech recognition runs on WebGPU when available, and video encoding uses your GPU's hardware encoder.
From raw take to finished cut
Open a video
MP4, MOV, WebM or MKV. Lumen transcribes it on your device; the speech model downloads once and is cached.
Edit the words
Strike out mistakes, trim long pauses, remove filler words. Playback skips every cut so you hear the result immediately.
Export
Save the edited video at its original size or upscaled to 4K, with matching captions and a clean transcript.