New FableCut Studio: the whole editor in your browser

The browser video editor agents can drive.

Open FableCut Studio, pick a folder of clips, and let Claude or ChatGPT cut your video while you watch. Nothing to install, and your footage never leaves your disk.

Open Studio Run it locally

Free and open source. Works with Claude Code, claude.ai, ChatGPT and any MCP client.

You

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

Agent fablecut_patch_project

+addClipfog-street.mp4V1 · 0.0s
+addClipneon-vending.mp4V1 · 3.2s
+addClipskyline.mp4V1 · 6.4s
+addCliptitleV2 · CUT BY AN AGENT
+addClipsynthwave.mp3A1 · 0.0s
~updateClipv1 v2 v3filterPreset: noir
✓Saved6 editsrevision 7

CUT BY AN AGENT

Cut by an agent. No hand edits.

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

PromptPut the footage inside the word SUMMIT, open a split screen, and orbit text around the climber.

PromptNeon city in 2:3. Glitch cuts and a glowing title that waves.

PromptA 9:16 street-food reel. Punch in on every beat and add pill captions.

PromptA widescreen surf trailer. Cut every bar, slow down the turn, warm film grade.

PromptSquare coffee promo. Draw a ring on, caption the beats, end on a lower third.

PromptBlack and white, 4:3. Slow dissolves and a quiet title.

PromptA vertical night-city reel cut to the beat, with a title that cycles fonts.

PromptRainy city, soft crossfades, a caption that fills in word by word.

PromptCut the dancers on the beat and slow into the last pose.

PromptMotorcycle reel. Letterbox bars, whip cuts, a speed ramp on the approach.

Your agent connects with one link.

The same editor, in your browser. Your clips never leave your disk.

Open FableCut Studio How Studio works

Open a folderPick one with your clips, or start fresh.
Nothing uploadsClips and project.json stay in the folder.
Connect your agentPaste the link into Claude Code, claude.ai or ChatGPT.
ExportAn .mp4 lands in exports/.

Edit the file. Watch the cut change.

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

Rather run it on your machine?

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

Cut something in the next minute.

Open Studio in your browser and point it at a folder of clips. Prefer your own machine? One command runs the same editor locally: Node 18 or newer, ffmpeg optional.

Open Studio Install locally Read the docs

npx -y fablecut

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