AI Shorts Generator
One long video in. Ten platform-ready shorts out.
Upload long-form footage — a podcast, webinar, talk or raw camera roll. Post.Engine's AI watches the entire video, finds the moments that stand alone, and cuts up to 10 captioned clips for Reels, TikTok, YouTube Shorts, LinkedIn, Facebook and X — each with its own cover and a high-quality MP4 download.
What one upload becomes
One recording, watched end to end, packaged per platform — here's the before and after.
Before
One long-form recording
A podcast, webinar, talk or raw camera roll. No timestamps, no notes, no edit.
After
- Reel — 0:129:16 · captions burned in · animated cover
- TikTok — 0:249:16 · hook text · trending-style cuts
- LinkedIn — 0:381:1 · subtitle bar · static cover
- Short — 0:199:16 · sticker emphasis · music bed
- Reel — 0:319:16 · quote pull · animated cover
- X clip — 0:4416:9 · clean captions · thumbnail
Every clip exports as a high-quality MP4 with its own cover — plus platform captions written from what was actually said.
How the AI shorts generator works
Four steps from raw footage to finished clips — no editing timeline, no exporting headaches.
- 01
Upload your long-form video
Drop in a podcast episode, webinar, keynote, tutorial or raw camera roll — any length. Oversized files are compressed into a full-length proxy right in your browser so the AI can analyze every minute, while your original file stays untouched for the final render.
- 02
The AI watches the whole thing
Not a trailer, not a summary — the entire video. It finds the hooks, the quotable moments and the segments that stand alone, then proposes a cut list of the strongest clips.
- 03
Review your clips and pick the vibe
Choose which cuts to keep, the format per platform, and tell it the feel — calm and cinematic, loud and playful, or anything in between. Ask for burned-in captions, on-screen text, memes, sound effects, sparkles or a music bed, and upload your own images or audio to work into the cut.
- 04
Render and download
Rendering happens in your browser, so your footage never leaves your machine. Every clip exports as a high-quality MP4 with its own cover or thumbnail — static or animated, your choice.
What every upload gets you
Not just cuts — a full short-form package per clip.
Up to 10 short clips per upload
Vertical 9:16, square 1:1 or widescreen 16:9 — sized for Reels, TikTok, YouTube Shorts, LinkedIn, Facebook and X.
Captions from what was actually said
Burned-in captions on every clip, plus written platform captions generated from the real dialogue — not a generic guess.
Covers and thumbnails
A static or animated cover for every short, and thumbnails for the long-form original too.
Music, memes and effects on request
Ask for a music bed, sound effects, stickers, sparkles or memes and the editor works them into the cut. Upload your own assets and it uses those too.
High-quality MP4 downloads
Every clip downloads as a crisp MP4, ready to post yourself on whatever schedule you like — no publishing lock-in.
Direct the edit in plain English
"Make it fun and playful", "keep it calm and cinematic" — describe the vibe and the editor follows. You stay the director.
Questions about the shorts generator
What you can upload, what comes out, and how much control you keep.
- What kind of videos can I upload?
- Anything long-form: podcast episodes, webinars, talks, tutorials, interviews, vlogs or raw footage straight off a camera. The AI analyzes the entire video, not just the beginning, so the best moments get found no matter where they happen.
- How many shorts do I get from one video?
- Up to 10 clips per upload. The AI proposes the strongest moments and you decide which ones to render — take all ten or just the two you love.
- Which platforms are the clips made for?
- Instagram Reels, TikTok, YouTube Shorts, LinkedIn, Facebook and X. Each clip is reframed to the right aspect ratio for its platform, with captions and covers to match.
- Do I need to compress my video before uploading?
- No. If your file is large, Post.Engine builds a small full-length proxy in your browser purely for analysis — your original high-quality file is what gets rendered and downloaded.
- Can I control the editing style?
- Yes — describe the vibe in plain English. Ask for fun and playful or calm and cinematic, request memes, sound effects, on-screen text, sparkles or music, and upload anything else you want worked into the edit.
- Do I have to post through Post.Engine?
- No. Everything downloads as a high-quality MP4 you can post wherever and whenever you want. Connecting socials or scheduling through the platform is entirely optional.
Your next ten posts are already filmed.
They're sitting in the long-form video you already made. Upload it and let the AI shorts generator cut, caption and cover them for every platform.