Build a Video Speed Changer with Claude Code
Simple tool that adjusts video playback speed for different purposes. Students, content creators, and professionals use it to speed up or slow down videos for learning, editing, and analysis.
The Claude Code prompt
Build a Video Speed Changer web app. People search for "video speed changer" about 3,700 times a month, plus related searches like "change video speed online", "slow down video", "speed up video". The goal is a tool that ranks for those searches and makes money. What it should do: Build a video speed changer web app. Create a homepage with video upload and speed control slider (0.25x to 4x speed). When users upload a video, show preview player with current speed indicator and real-time playback. Add preset speed buttons (0.5x, 1x, 1.5x, 2x) and custom speed input. Include audio pitch preservation option and frame rate information. Show processing progress and download with speed-adjusted video. Use clean design with speed-focused UI elements and clear controls. Focus on the upload and speed adjustment flow first. How to build it: 1. Read this folder first. If it is empty, set up Next.js (App Router, TypeScript, Tailwind). Write a short PLAN.md with the pages, components, any library or API you need, and what you are leaving for later. Then build. 2. Put the tool itself on the homepage so a visitor can use it within seconds, with no sign-up. Do the processing in the browser where you can, so it is fast and cheap to run. Look at how Clideo, Kapwing, VEED.io do it and make ours simpler and faster. 3. Make it rank. Use "video speed changer" in the title tag, H1 and meta description. Under the tool, add a short how-to and an FAQ with FAQPage schema, and add a sitemap and robots.txt. Scaffold these programmatic pages from one template and a data file: /change-video-speed-[percentage], /video-speed-changer-for-[use-case], /adjust-[video-type]-speed. 4. Monetisation: Freemium: 5min videos, $6/mo unlimited + no watermark. Add a pricing page and the free usage limit, and leave Stripe checkout as a clearly marked stub with the environment variables it needs. 5. Run it locally and test the main flow end to end, including edge cases like empty input and very large files. Fix what breaks, then finish with a summary of what works, what is stubbed and how to deploy it to Vercel.
Paste it into Claude Code in an empty folder. It plans first, so read PLAN.md and steer before it starts building.
What people search for
Who you're up against
Pages that can rank
One template, many long-tail pages:
- /change-video-speed-[percentage]
- /video-speed-changer-for-[use-case]
- /adjust-[video-type]-speed
Content to write
- How to change video speed for learning
- Video speed adjustment for content creation
- Best practices for slow motion effects
How it makes money
Freemium: 5min videos, $6/mo unlimited + no watermark
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