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The next cut is yours.

A native Windows video editor you can edit by hand or hand to an agent. Free and open source at launch.

Edit by hand.

Move a clip, trim a shot, play it back. Shape the rhythm by hand, with picture and sound together in the timeline.

Before: a 12-frame gap between the crown clip and the swimmer, with the pointer on the crown's tail.
Before
After: the crown's tail meets the swimmer's first frame.
After
Close the 12-frame gap, then open it again.

  • Place the cut.

    Insert, overwrite, split and trim, with snapping and markers.

  • Shape the motion.

    Keyframe position, scale, rotation, crop, opacity and volume.

  • Find the color.

    Color wheels, curves and .cube LUTs, with grain, glow or a vignette.

  • Finish the film.

    Export H.264, HEVC or ProRes at a preset, timeline or custom size.

Or hand it to an agent.

Six shots, cut on the beat. See the real MCP calls beside the timeline they changed.

  1. Dancer turning in a pool of light.
    Dancer5 s
  2. A drop forms a crown on dark water.
    Crown5 s
  3. Swimmer emerging from the water.
    Swimmer5 s
  4. Boxer moving in the dark.
    Boxer5 s
  5. A cymbal struck in a shaft of light.
    Cymbal5 s
  6. Rider passing through the dark.
    Rider5 s

Recorded MCP session. Playback timing is illustrative.

Recorded request“Cut V1 on every beat. The score is 120 BPM, so every 12 frames.”

22 cuts8 calls

After the session: 22 cuts in 8 calls
The After Dark timeline before the session: six uncut clips on V1.
Before the session: six clips, uncut
Before
Before call 1: the dancer clip on V1, uncut.
After
After call 1: the dancer clip split at frames 12, 24 and 36.
Call 1, split_clips at frames 12, 24 and 36
  1. split_clipsV1 [12, 24, 36]11 ms
  2. split_clipsV1 [60, 72, 84]4 ms
  3. split_clipsV1 [108, 120]2 ms
  4. split_clipsV1 [132, 156, 168]4 ms
  5. split_clipsV1 [180, 204, 216]3 ms
  6. split_clipsV1 [228, 252]2 ms
  7. split_clipsV1 [264, 276, 288]3 ms
  8. split_clipsV1 [300, 312, 324]25 ms
All eight calls and the full timeline
  1. split_clipsV1 [12, 24, 36]11 ms
  2. split_clipsV1 [60, 72, 84]4 ms
  3. split_clipsV1 [108, 120]2 ms
  4. split_clipsV1 [132, 156, 168]4 ms
  5. split_clipsV1 [180, 204, 216]3 ms
  6. split_clipsV1 [228, 252]2 ms
  7. split_clipsV1 [264, 276, 288]3 ms
  8. split_clipsV1 [300, 312, 324]25 ms
The After Dark timeline after the session: V1 split into short clips on the beat.

  • 76 editing tools.

    Import, trim, color, caption and export. Temno gives agents concrete editing operations.

  • A local connection.

    MCP runs on your PC and requires a token. Setup is in Help → MCP Instructions.

Deeper blacks. Warmer skin.

A touch of indigo in the shadows changes the feel of the frame. This grade came from one apply_color call in Temno.

Before on the left, after on the right. Drag the line, or use the arrow keys.

Dancer with deeper blacks, indigo shadows and warmer skin. Dancer before color grading.

See every word land.

Turn English speech into captions that light up word by word. Whisper transcribes on your PC, without uploading your audio.

On your PC. English only for now.

Temno Captions panel: Generate captions. Transcribes on this PC using the English model. Mode: Local · this PC.

At home on your PC.

Your project lives in a plain folder on your PC. Editing, preview and export run there too.

Your projects
Plain .temno folders on your PC
The editor
Will be free, with no account required
Tested on
Windows 11, 64-bit
Source
Open source at launch, under GPL-3.0
More specifications
App
WinUI 3 · C# · .NET 8
Video export
H.264 · HEVC · ProRes
Frame size
720p · 1080p · 2K · 4K · custom
Encoding
NVIDIA NVENC · software fallback
Timelines
Multiple timelines · nested sequences
XML export
FCPXML · XMEML, export only
Transcription
Whisper · English · on your PC
Agent connection
Local MCP · token required

A few things to know.

When can I download Temno?

Temno is in development. There’s no public download yet.

Will Temno be free?

Yes. The editor will be free and won’t require an account. Hosted extras, including AI generation and hosted models, will be offered through an optional paid subscription. Pricing is not final.

Which Windows PCs has Temno been tested on?

Temno has been tested on 64-bit Windows 11. Windows 10 and ARM PCs are untested.

Do I need an agent?

No. You can arrange and trim clips, adjust color, add captions and export by hand. An agent is optional.

How do I set up an agent?

Temno provides a local MCP connection protected by a token. Help → MCP Instructions includes setup steps for several coding agents. The built-in chat panel requires your own API key and an Anthropic-compatible endpoint. Hosted models through sign-in are not available yet.

What leaves my PC?

Editing, preview, export, transcription and transcript search run locally. Chat sends conversations and tool results to your provider; these can include transcripts and preview frames. Generation uploads source media. Signing in also uses an online service. External agents use their own providers.

What can I do with speech?

Transcribe English speech on your PC, then search the transcript or delete words to cut the audio. Mark or remove silences, and make captions with word highlights. You can also import SRT or WebVTT captions. Transcription is English-only for now, with no speaker identification.

What can I export?

Export H.264, HEVC or ProRes video at a preset size, your timeline’s size or custom dimensions. Temno also supports FCPXML and XMEML export. XML support is export only.

What does Temno mean?

Greek témno means “I cut.” Slavic temno means “dark.” Both meanings are part of the name.

Temno

The cut happens in the dark.

Coming to Windows