Turn one long YouTube video into a week of Instagram Reels.
Drop your YouTube URL. PostSpark pulls the highest-retention moments, scripts each one as a scroll-stopping Reel, generates the caption + hashtags, and ships a 9:16 cut ready to record or upload — in under 90 seconds.
Trusted by creators publishing to
Why creators give up on short-form
Short-form burns out the best creators.
Scripting, hooks, captions, vertical re-edits, hashtags — the editing tax kills the channel before it grows.
An afternoon per Reel
Watching back a 20-minute video to find the 3 best moments eats a whole work session.
Cropping kills the framing
Manual 16:9 → 9:16 cuts off heads, hides slides, and buries the on-screen captions.
Reel hooks ≠ YouTube hooks
What works as a YouTube intro flat-lines on Reels — the first 1.5 seconds need a different angle.
Caption fatigue
Writing fresh Instagram captions + hashtags for every clip is the part most creators quietly skip.
The PostSpark pipeline
From idea to ready-to-record in under 60 seconds.
Paste your YouTube URL
Any public video — long-form, podcast, tutorial. PostSpark handles the transcript.
AI finds the gold
Highest-retention moments scored 0-100 and matched to Reel-shaped angles.
Get the Reel pack
5 vertical scripts, captions in your brand voice, hashtags, and on-screen text.
Record or upload
Use the script as a teleprompter, generate a voiceover, or burn captions in-browser.
Inside Shorts Studio
A full short-form production studio in one tab.
Highlight extraction
Claude scans the full transcript and surfaces the 5 most repostable moments with a virality score.
9:16 auto-reframing
Subjects stay centered, slides stay readable, no manual cropping.
AI voiceover (Reels-tuned)
6 voices optimized for Instagram pacing — drop straight into your edit.
Burned-in captions
Reels-style on-screen captions exported as SRT or burned into the clip in-browser.
Reels trending audio
Curated Reels-specific sounds per niche — copy the exact in-app search string.
Cover image generator
AI-generated cover frames that match Instagram's grid aesthetic.
Head-to-head
Why creators leave Opus Clip and Repurpose.io and Submagic for PostSpark.
| Feature | PostSpark | Opus Clip | Repurpose.io | Submagic |
|---|---|---|---|---|
| AI hook score per clip | ||||
| Reels-specific tone (not just TikTok) | limited | |||
| Brand voice training | ||||
| AI voiceover | ||||
| Cover image generator | ||||
| 5 scripts from 1 source (Series mode) | ||||
| Free tier with full output | 3/mo | 60s clips | limited | limited |
| Lifetime deal | $97 |
Comparison based on publicly available features as of 2026.
Real outputs
Hooks PostSpark wrote this week.
"I watched 200 hours of my own footage so you don't have to"
CTA
Save this — episode 2 drops Friday
"The 8-second mistake every YouTuber makes when cutting Reels"
CTA
Full walkthrough on the channel link in bio
"If your Reels are flat-lining, it's not the algo — it's this"
CTA
Comment 'reels' and I'll DM the template
FAQ
Questions creators ask first.
Does it download the YouTube video?+
PostSpark pulls the public transcript and the highlight timestamps. For the actual video edit you upload your own MP4 — your channel, your footage.
What if my video doesn't have captions?+
PostSpark generates a transcript automatically (Claude + AssemblyAI). 100+ languages supported.
How many Reels do I get per video?+
Free tier: 1 script per video, 3 videos/month. Pro: unlimited scripts and Series mode for 5 episodic Reels per source.
Can I match my Instagram tone?+
Yes — Brand Voice training (Pro) learns from your top Reels and auto-applies your tone to every generation.
Does it publish to Instagram directly?+
Instagram publishing rolls out as Meta approves our app — your scripts, captions and 9:16 cuts are ready to paste or upload today.
Is it really free?+
Yes — 3 full Reel scripts per month, no credit card. Pro is $24/mo (or $19 annual) for unlimited.
What about podcast → Reels?+
Same workflow. Paste a podcast YouTube link and PostSpark extracts the 5 most clip-worthy moments.
Will the scripts feel like AI slop?+
No — hooks are scored against 10,000+ top Reels, and Brand Voice training matches your phrasing. Most users only edit 1-2 words.
Stop editing. Start posting.
Join 12,000+ creators using PostSpark to turn one idea into a week of short-form content.
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