v1.9.0 Targeting & locks, trim tools, markers & full JKL

The browser video editor agents can drive.

A Premiere-style editor whose whole timeline is one JSON file. Any agent that writes JSON can edit video.

Get started

You

Cut a teaser from these three clips. Title it CUT BY AN AGENT, then give it a noir finish.

Agent fablecut_patch_project

+addClipviolet.mp4V1 · 0.0s
+addClipamber.mp4V1 · 3.2s
+addClipteal.mp4V1 · 6.4s
+addCliptitleV2 · CUT BY AN AGENT
+addClippad.mp3A1 · 0.0s
~updateClipv1 v2 v3filterPreset: noir
✓Saved6 editsrevision 7

CUT BY AN AGENT

Edit the file. Watch the cut change.

Every clip, title and keyframe lives in project.json. Try an edit the way an agent would write it, or type into the file yourself.

Try an edit

project.json

{
  "name": "Playground reel",
  "width": 1080,
  "height": 1920,
  "fps": 30,
  "background": "#05050a",
  "revision": 1,
  "markers": [
    {
      "t": 3.2,
      "label": "cut"
    },
    {
      "t": 6.4,
      "label": "whip"
    }
  ],
  "clips": [
    {
      "id": "v1",
      "mediaId": "m_violet",
      "kind": "video",
      "track": "V1",
      "name": "violet",
      "start": 0,
      "in": 0,
      "duration": 3.4,
      "props": {
        "fit": "cover",
        "volume": 0
      },
      "keyframes": {
        "scale": [
          {
            "t": 0,
            "v": 1
          },
          {
            "t": 3.4,
            "v": 1.12
          }
        ]
      }
    },
    {
      "id": "v2",
      "mediaId": "m_amber",
      "kind": "video",
      "track": "V1",
      "name": "amber",
      "start": 3.2,
      "in": 0,
      "duration": 3.4,
      "props": {
        "fit": "cover",
        "volume": 0,
        "filterPreset": "cinematic"
      },
      "transitionIn": {
        "type": "fade",
        "duration": 0.4
      }
    },
    {
      "id": "v3",
      "mediaId": "m_teal",
      "kind": "video",
      "track": "V1",
      "name": "teal",
      "start": 6.4,
      "in": 0,
      "duration": 3.2,
      "props": {
        "fit": "cover",
        "volume": 0,
        "vignette": 30
      },
      "transitionIn": {
        "type": "whip",
        "duration": 0.25
      }
    },
    {
      "id": "t1",
      "kind": "text",
      "track": "V2",
      "name": "title",
      "start": 0.4,
      "duration": 2.8,
      "props": {
        "text": "EDIT THIS JSON",
        "font": "Anton",
        "fontSize": 128,
        "color": "#ffffff",
        "uppercase": true,
        "textAnim": "word-pop",
        "wordRate": 0.14,
        "textShadow": 18,
        "y": 420
      }
    },
    {
      "id": "t2",
      "kind": "text",
      "track": "V2",
      "name": "kicker",
      "start": 3.6,
      "duration": 2.6,
      "props": {
        "text": "watch it happen",
        "font": "Playfair Display",
        "fontSize": 96,
        "color": "#ffffff",
        "color2": "#ffd24a",
        "textAnim": "clip-reveal",
        "y": -80
      }
    },
    {
      "id": "a1",
      "mediaId": "m_pad",
      "kind": "audio",
      "track": "A1",
      "name": "pad",
      "start": 0,
      "in": 0,
      "duration": 9.6,
      "props": {
        "volume": 0.6
      },
      "transitionOut": {
        "type": "fade",
        "duration": 1.5
      }
    }
  ],
  "inPoint": null,
  "outPoint": null
}

Loading the editor

The real editor, running in your browser. Nothing is uploaded. Open the full playground

Works with the agent you already use.

FableCut ships an MCP server over plain stdio, so any MCP client can read and rewrite your timeline. Claude Code and Claude Desktop install it in one step.

Full setup guide

// In Claude Code. No path, no config.
/plugin marketplace add ronak-create/FableCut
/plugin install fablecut@fablecut

codex mcp add fablecut -- \
  npx -y fablecut mcp

gemini mcp add -s user fablecut \
  npx -y fablecut mcp

// ~/.cursor/mcp.json
{
  "mcpServers": {
    "fablecut": {
      "command": "npx",
      "args": ["-y", "fablecut", "mcp"]
    }
  }
}

// opencode.json
{
  "mcp": {
    "fablecut": {
      "type": "local",
      "command": ["npx", "-y", "fablecut", "mcp"],
      "enabled": true
    }
  }
}

amp mcp add fablecut -- \
  npx -y fablecut mcp

What people are saying

“FableCut isn’t trying to be another AI video editor. It’s trying to become a video editor that AI agents can fully control.”

QCXINT, on X

“A genuinely clever architecture: the whole timeline is one JSON file, so any agent that can write JSON can edit video.”

Kompozy, review

“The AI video editor where the AI actually edits.”

Evgenii Arsentev, on YouTube

Front page of Hacker News, 98 points See all mentions

Up and running in under a minute.

Node 18 or newer and a Chromium browser. ffmpeg is optional, for fast export.

Get started Read the docs

npx -y fablecut

Then open localhost:7777. MIT licensed, zero npm dependencies.

The browser video editor agents can drive.

Edit the file. Watch the cut change.

Works with the agent you already use.

What people are saying

Fluxion AI

Up and running in under a minute.