CopywaViral copy generator
A free AI tool for short copy: enter a product or topic, pick a platform and a copywriting formula, get 3 short pieces with how the formula was used and banned words marked. 3 free runs a day, no sign-in.
5 copywriting formulas (with templates)
The generator's five formulas, with their structure and a template to fill in. Replace what's in [ ] with yours.
- 01
Pain → solution
Name the reader's concrete pain and what it costs, offer the solution, then show the change. Fits most product copy.
Template: [Pain] every day? It's not you, it's [cause]. With [product/method], [change] in [time].
- 02
Contrast
Open with before and after, expected and real, or price and effect to surprise, then explain why. Great for hooks.
Template: I used to [bad state]; now [good state], thanks to one thing: [method].
- 03
List
Organise as "N reasons / ways / details", one line each, easy to skim and save. Fits tips and reviews.
Template: [Audience] picking [category], remember these [N]: 1. [point]; 2. [point]; 3. [point].
- 04
Story
Start from a real person and scene: the problem, the turn, the result, with the product coming in naturally. Fits Moments and article openings.
Template: [When], [someone] at [scene] hit [problem]… until [turn]; then [result].
- 05
Comparison
Put two options side by side on a few dimensions and say who each suits; never run down a named brand.
Template: [A] or [B]? Compared on [d1], [d2], [d3]: [audience] pick [A], [audience] pick [B].
How to use it
- 01
Enter a product or topic
Say what you sell, who it's for and its concrete benefits; the more specific the facts, the less generic the copy.
- 02
Pick a platform and a formula
The platform sets length and tone (Xiaohongshu, Douyin voice-over, Moments, WeChat opening); the formula sets the structure.
- 03
Check the breakdown and banned words, then copy
Each piece says which line does which step of the formula and is checked for banned words; copy one on its own and fix any marked words.
FAQ
Is the viral copy generator free? Do I need an account?
It's free with no sign-up: 3 free runs a day per network, 3 pieces each. After that, signing up to Copywa gives you free credits; signed in, keep using this page and each run is charged in credits by actual usage.
What is a copywriting formula?
A structure proven over and over, such as pain → solution, contrast, list, story or comparison. Writing to one keeps the hook strong, the logic clear and the ending actionable. The five formulas and their templates are listed below.
Which formula suits me?
Start with pain → solution for a product; use contrast for a stronger hook; list for tips and reviews; story for Moments and article openings; comparison for two choices. Not sure? Try a few and keep the best.
How do the platforms differ?
Xiaohongshu: a 120–200 character first-person share. Douyin: short spoken lines with a 3-second hook. Moments: 60–120 characters, like a friend's post. WeChat opening: 150–250 characters that lead into the article.
Can the copy contain banned words?
The prompt rules out absolute terms and efficacy claims, but AI makes mistakes. So every piece is checked: Xiaohongshu copy against the three Xiaohongshu lists, Douyin scripts against the three Douyin lists (Douyin diversion and baiting words, Advertising Law terms, inflated efficacy), Moments and WeChat openings against Advertising Law terms and inflated efficacy, with hits marked.
Can I use the templates as they are?
Use them as drafts, but swap in your own real numbers and stories and fix any marked words. The generator only uses the facts you give it, so it never makes up data.
Is what I enter stored?
No. The product or topic is only sent to the AI model service (OpenAI) to write the copy, which is shown only in your browser. To limit free runs, the server keeps one daily count under an encrypted form of your IP, deleted the next day.
Does a failed run count?
No. If the AI fails or times out, the free run and credits are given back; just try again.
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Open tool
Want AI to write compliant copy for you?
After signing up, write from your brand profile and voice, and turn one draft into Xiaohongshu, WeChat and Moments versions.