Here are the top free AI content writing tools in 2025 that support prompt-based generation, perfect for blog posts, marketing content, social media, SEO, and more — each with their official link:
✍️ Top Free AI Content Writing Tools (With Prompt Support)
1. ChatGPT by OpenAI
- 🧠 Powerful general-purpose writer.
- ✅ Free with GPT-3.5; accepts custom prompts like “Write a 300-word blog about AI in education.”
2. Google Gemini
- 💡 Google’s AI writing assistant (formerly Bard).
- ✅ Free with a Google account.
- Ideal for emails, summaries, outlines, and creative writing.
3. Writesonic
- ✒️ Create blog posts, ad copy, social media text, and SEO content.
- ✅ Free tier with limited monthly words.
- Prompt: “Write a product description for an AI video generator tool.”
4. Copy.ai
- 📢 Marketing-focused writing tool for sales emails, blogs, and ads.
- ✅ Free plan with daily usage limits.
- Prompt-based generation: “Create a blog intro about AI in small business.”
5. Simplified AI Writer
- 📝 Long-form writing, ads, captions, and website copy.
- ✅ Free plan for individuals.
- Offers prompt templates + custom input like “Write a funny Instagram caption about AI.”
6. Notion AI
- 📘 AI assistant for drafting, summarizing, or expanding notes.
- ✅ Free trial included in Notion workspace.
- Use inside documents with prompts like “Make this text more professional.”
7. Rytr
- 🖋️ Lightweight AI writer with 30+ templates and tone control.
- ✅ Free plan with 10,000 characters/month.
- Prompt sample: “Write a motivational LinkedIn post about learning AI.”
8. Jasper AI (Free Trial)
- ⚙️ Advanced tool for business copy, content marketing, and emails.
- ✅ Free trial available (paid afterward).
- Great for structured, brand-specific content.
9. QuillBot AI Writer
- 🔄 Known for paraphrasing and summarizing, also supports prompt writing.
- ✅ Free basic access.
- Prompt idea: “Summarize this blog about AI tools in 100 words.”
10. INK AI Writer
- 🚀 Content optimizer for SEO + AI writing assistant.
- ✅ Free plan includes AI writer with prompt input.
- Prompt: “Write a product landing page for AI meme generator.”
🔧 Bonus Tip:
Use prompt structure like:
“Write a 150-word blog intro in a friendly tone about [your topic].”