YouTube Shorts generator
auto-reframe, caption, and export vertical cuts
Generate YouTube Shorts from your long-form content automatically. EditAssist finds the best moments, reframes to 9:16 vertical, burns in captions, and exports ready-to-upload Shorts. All processing runs locally on your machine.
Workflow
Upload or ingest your long-form video and the agent transcribes every word and indexes every frame. Ask for 'the most viral-worthy 30 seconds' or 'create a vertical 9:16 recut of this horizontal sequence' and it identifies the strongest moments, reframes with subject-aware cropping, and burns in clean captions.
Export directly to YouTube Shorts spec: 9:16, 1080x1920, with normalised loudness and safe-area framing. The agent can batch-generate multiple Shorts from a single video, each with a different hook, and deliver them as a numbered package ready for upload.
Prompts
“Create a vertical 9:16 recut of this horizontal sequence.”
“Cut a 30-second teaser from the full music video and optimise it for YouTube Shorts.”
“Find the most viral-worthy 30 seconds of this vlog.”
“Export a 1080p master and a vertical cut for Shorts.”
“Build a vertical edit of the dance sequence with beat-matched cuts for Instagram Reels.”
“Reframe the widescreen music video into 9:16, 1:1, and 4:5 for every platform in one go.”
“Create 15 TikTok cuts from the music video: each one a different visual hook.”
“Find the frame with the most visual energy in the performance and use it as the thumbnail.”
Features
Smart reframing
Subject-aware vertical crop that tracks faces and action so nothing important is lost in the 9:16 conversion.
Auto-caption burn
Clean, readable captions burned directly into the video with timing accurate to the transcript.
Moment selection
Finds the most engaging 30-60 second segments using audio energy, visual interest, and transcript punchiness.
Batch Shorts export
Generate multiple Shorts from one long-form video, each with a different hook, delivered as a numbered package.
Local-first
All transcription, vision analysis, semantic search, and clustering run on your own GPU. Nothing about your footage is uploaded. The only data that leaves is the text of your conversation with the agent. It's free to download, local models are free, and a new account starts with £15 of credit and no card. For long-running cloud work, pay as you go, or choose £20/mo Starter or £100/mo Pro.
Getting started
- 01Download EditAssist for macOS or Windows and create an account. You get £15 credit and no card is needed.
- 02Ingest your footage. The agent transcribes, indexes, and clusters automatically.
- 03Describe what you want in plain English and let the agent build the cut.
- 04Review, refine with conversational commands, and export to your delivery spec.
More tools: Auto clip generator, Podcast to Shorts, Vertical video reframe. Or see everything EditAssist connects to.