Free ChatGPT & Claude Prompt Library
PromptLab is a free, organised collection of prompts for ChatGPT, Claude, Gemini and other AI tools. Every prompt has a clear structure with [placeholders] you fill in — so you can copy, customise and use in under a minute.
What makes a good AI prompt?
- Specific goal — tell the AI exactly what output you want
- Context — who you are, what the task is for, who the audience is
- Format instructions — length, structure (bullet points, numbered list, paragraphs), tone
- Constraints — what NOT to include, word limits, rules to follow
Prompt categories available
- Marketing prompts — Facebook ads, Google Ads, email newsletters, campaign briefs, brand taglines
- Writing prompts — blog outlines, introductions, YouTube scripts, press releases, product descriptions
- Coding prompts — code review, debugging, unit tests, SQL queries, regex, refactoring
- HR & Jobs prompts — resumes, cover letters, job descriptions, interview questions, performance reviews
- Business prompts — business plans, investor emails, SWOT analysis, OKRs, partnership proposals
- Social media prompts — LinkedIn posts, Twitter threads, Instagram captions, content calendars
- Sales & Email prompts — cold outreach, follow-up sequences, objection handling, proposals
- SEO prompts — meta descriptions, title tags, FAQ sections, content briefs, keyword clusters
- Education prompts — study plans, quiz questions, flashcards, book summaries, lesson plans
- Productivity prompts — goal setting, daily schedules, travel itineraries, decision frameworks
Frequently Asked Questions
What is the difference between ChatGPT and Claude prompts?
Both ChatGPT (by OpenAI) and Claude (by Anthropic) are large language models that understand natural language instructions. The same prompt generally works well on both — the main differences are in response style. Claude tends to follow formatting instructions more precisely, while ChatGPT may be more creative. All prompts on PromptLab are tested to work on both.
How do I use a prompt from PromptLab?
Click "Copy Prompt" on any card. Open ChatGPT (chat.openai.com) or Claude (claude.ai). Paste the prompt. Replace the [placeholders] with your actual information. Press Enter. The AI will generate a tailored output in seconds.
Can I customise these prompts?
Yes — in fact, that's the point. Every prompt uses [brackets] to mark what you should customise. You can also add more context, change the format instructions, or combine parts of different prompts to create your own.
Do these prompts work with the free version of ChatGPT?
Most prompts work well with the free version of ChatGPT (GPT-3.5). For complex tasks like code review, SWOT analysis, or long-form writing, GPT-4 or Claude 3 will give significantly better results.