One video.
12 posts, done.
Paste a YouTube URL. Get an X thread, LinkedIn post, blog, newsletter, Shorts script, and 9 more formats — all in 30 seconds. Stop writing from scratch every single time.
No credit card needed. Try one full video free.
Distribution cockpit
YouTubeから12本の投稿へ。流れまで見える。
X
ReadyHook thread
Executive summary
note
DraftLong-form draft
12
formats
30s
first draft
3
channels
No credit card needed. Free plan covers one full video per month.
See it in action
Paste a YouTube link and get 12 SNS content formats in seconds.
One URL. 12 formats. All at once.
Castify fetches the transcript automatically, then generates all 12 formats at once. No prompts. No copy-pasting. No doing it 12 separate times.
Gets better the more you use it
Your preferred tone, formats, and writing feedback are saved and applied automatically next time.
Social Media
X Thread
Starts with a hook, builds through the key ideas, ends with a call to action. Keeps people reading to the end.
5-tweet thread starting with 'Why 99% of people fail at X (1/5)'
LinkedIn Post
Professional, story-driven format. Structured the way LinkedIn posts actually get read.
800-word post: problem to insight to lesson
Quote Extracts
5–10 standout lines pulled from the video. Good for social posts, slides, or repurposing.
5-10 pulled lines like 'The best time to do X is when Y'
Long-form Content
note Article
Structured with headers, bullet points, and emojis. Reads like a native note post.
1,500-2,000 word article with 3-5 headers and emoji
Blog Post
Intro, body, conclusion — with search in mind. Ready to publish as-is.
2,000-3,000 word SEO article with H2/H3 structure
Newsletter
Subject line included. Intro, key takeaways, and a clear next step — the structure people actually read.
3 subject line options plus intro, main, and CTA body
Show Notes
Timestamped chapters, links mentioned, and key takeaways. Paste straight into your podcast host.
00:00 Intro / 03:20 Main topic / 18:40 Wrap-up
Utility Tools
Transcript
YouTube captions cleaned and formatted. Speaker changes detected and labeled.
Cleaned transcript with Speaker A and Speaker B labels
Summary
3–5 bullet points covering the main ideas. Good for meeting notes or quick previews.
3 bullets: what it is, why it matters, how to apply
Title Ideas
5 title options in different styles — questions, numbers, bold statements. Pick whichever fits.
5 options across question, number, and bold claim styles
Video Description
YouTube description with timestamps and hashtags included. Just paste and go.
Timestamped description plus 10 relevant hashtags
Shorts Script
3 hook options + 60-second script + caption. Works for TikTok, Shorts, and Reels.
3 hooks plus 60-second script plus caption
One video. 12 types of content.
Switch tabs to explore every format. All of this was generated in under 30 seconds.
Source video: How Great Leaders Inspire Action — Simon Sinek
People don't buy what you do. They buy WHY you do it. 🧵
2/7 Simon Sinek's "Golden Circle" flips conventional marketing logic upside down. Most companies communicate from the outside in: What → How → Why. Apple, Wright Brothers, MLK all start from the inside out: Why → How → What.
3/7 The biology backs it up. The "why" speaks to the limbic brain — the part that controls behavior and decision-making but has no capacity for language. That's why you can't always explain why you chose one brand over another. You "just felt it."
4/7 The Wright Brothers vs Samuel Langley. Langley had $50,000 from the War Department, a team of experts, and media coverage. The Wright Brothers had no funding, no college degrees, and local bicycle shop employees. The Wright Brothers flew first. Why? Langley wanted to get rich. The Wright Brothers believed they could change the world.
5/7 The Law of Diffusion of Innovation: you need to reach 15–18% market penetration before an idea tips into the mainstream. But those first adopters don't buy because of features — they buy because they believe what you believe. They're not customers, they're ambassadors.
6/7 MLK's march: 250,000 people showed up on the National Mall on August 28, 1963 — with no Facebook event, no email invite. They came because they believed what he believed. He gave the "I have a dream" speech, not the "I have a plan" speech.
7/7 The goal isn't to sell to people who need what you have. The goal is to sell to people who believe what you believe. Start with WHY.
#Leadership #Marketing
Simple pricing
Try one full video free. Upgrade when you need more.
Free
Sign up and start immediately. No card needed.
- 30 credits/month (enough for one full video)
- All 12 output formats
- English & Japanese
- Copy to clipboard
Pro
For serious content creators
- 1,000 credits per month
- All 12 output formats
- English & Japanese
- Generation history
- Priority processing
- Email support
Writing on note
Behind-the-scenes on building Castify and thoughts on Micro SaaS.