About

Built for creators,
one tool at a time.

dua9.online · Free AI Tools for Writers & Pinterest Creators

What is dua9.online?

dua9.online is a free, growing collection of AI-powered tools for content writers, digital marketers, and Pinterest creators. Each tool is a self-contained page that does one specific thing — fast, privately, and without requiring an account.

We started with a simple frustration: most AI tools are either too expensive, too bloated, or require you to hand over personal information just to try them. dua9.online is the opposite. Open the tool, use it, close the tab. That's it.

The Tools

We currently offer seven tools, with more shipping regularly:

Write Viral Articles (AI) — Type a topic, choose your AI provider, get a complete SEO article with outline, headings, and body text in seconds. Works with Claude, Groq, OpenAI, and OpenRouter.
AI Image Prompt Generator — Paste any article and get production-ready AI image prompts for every section — matched to 16 content niches and 6 visual styles. Free with Groq.
Pinterest Pin Creator AI — Generate scroll-stopping Pinterest pin titles, hooks, and layout recommendations for any blog post or product. Powered by Groq (free) or your own Claude key.
Pin Design Studio — 55 Styles — Full Pinterest pin design pipeline: pick a style from 55 presets, write a title, generate the pin image using Ideogram V3, GPT-Image-2, or Z-Image Turbo. Export at 2:3 ratio.
Compress Images — No Upload — Compress JPG, PNG, and WebP images by up to 72% directly in your browser. Nothing leaves your device. No server, no account, no file size limits.
Make AI Text Sound Human — Generate complete, human-sounding content for tool pages and authority sites. NLP-optimized, E-E-A-T focused, FAQ schema ready. Works with Claude or OpenAI.
Pinterest Viral Pin Analyzer — Enter any blog post title and get a complete Pinterest growth strategy: pin formats, visual styles, headlines, board recommendations, and 10+ ready-to-publish pin variations with CTR scores.

Privacy First

Tools that use AI require an API key — but your key never leaves your browser session. We don't store it, log it, or share it. When you close the tab, it's gone. For full details, see our Privacy Policy.

The image compressor runs entirely on your device using the browser's Canvas API. No file is ever uploaded anywhere.

What We Believe

One tool, one job, done well. No feature creep. Each page solves exactly one problem.
Speed is a feature. Every tool loads in under a second. Most run without any server roundtrip.
Bring your own key. The free tier is genuinely free — you bring your API credentials and we connect the interface. We don't charge for access to the tools themselves.
Privacy by design. We collect as little data as possible and are transparent about what we do collect.

Contact & Feedback

Have an idea for a tool? Found a bug? Want to collaborate? We read everything.

Reach us at hello@dua9.online or use the contact form.