🧹 ClearMark AI — Open-Source AI Watermark Remover SaaS (Free Watermarkremover.io / HitPaw Alternative)

Remove watermarks, logos, stamps, and text overlays from images in seconds with AI. A production-ready, self-hostable Next.js SaaS boilerplate built for photographers, designers, and content creators — powered by GPT Image 2 via the MuAPI inference layer. A free open-source alternative to Watermarkremover.io, HitPaw, and Inpaint.

Tech stack: Next.js 14 (App Router) · Prisma · PostgreSQL · NextAuth (Google OAuth) · Stripe · Tailwind CSS · MuAPI GPT-Image-2 · Webhook-backed async delivery Use cases: Stock photo cleanup · Product image cleaning · Old photo restoration · Document digitization · Photography agencies · Content creator tools · E-commerce listing photos · Print-ready image prep

🌐 Project Details

GitHub Repository: github.com/SamurAIGPT/clearmark-ai

Live Demo: clearmark-ai.vercel.app

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ClearMark AI is a production-ready AI web application that removes watermarks, restores old photos, and cleans documents using the gpt-image-2-image-to-image model. Users upload a single image, select a processing scenario, customize the AI prompt, and receive a clean, high-resolution result.

✨ Core Features

🧹 AI Watermark Studio (Main Page /)

• Upload any image via file picker or drag-and-drop
• 3 Scenario Quick-Select Presets with pre-filled prompts:
  • 🖼️ Remove Watermark — removes logos, copyright text, and overlays via contextual in-painting
  • 📸 Restore Old Photo — fixes scratches, fading, tears, and stamps on vintage photographs
  • 📄 Clean Document — removes stamps, annotations, and overlays from scanned receipts and certificates
• Editable AI prompt for custom instructions
• Advanced options: Aspect Ratio, Resolution (1K/2K/4K), Quality (low/medium/high)
• Before/After comparison toggle in the result panel
• Cost: 18 credits per AI generation

🖼️ Personal Gallery (/gallery)

• Responsive CSS grid of all watermark-removed images
• Thumbnail overlay showing the original input for reference
• Full-screen detail modal with Before/After toggle, HD download, and delete
• Auto-refresh every 4 seconds for in-progress jobs

💳 Stripe Credit Billing (/pricing)

• Four one-time credit packs (no subscriptions):
  • Basic Pack ($5 / 1,000 credits)
  • Standard Pack ($10 / 2,000 credits)
  • Professional Pack ($20 / 4,000 credits — Most Popular)
  • Business Pack ($50 / 10,000 credits)

🔐 Google Auth + Credit Persistence

• NextAuth Google provider with Prisma adapter
• Credits displayed live in the Navbar with a pulsing coin icon

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⚡ Deployment: Vercel & Production

Live App: clearmark-ai.vercel.app

🔑 Required Environment Variables

Service	Variable	Description
Database	DATABASE_URL	PostgreSQL connection string (Supabase or Neon)
NextAuth	NEXTAUTH_SECRET	Secure random string via openssl rand -base64 32
	NEXTAUTH_URL	Your production domain
	WEBHOOK_URL	Public URL for MuAPI async callbacks
Google OAuth	GOOGLE_CLIENT_ID	Google Cloud Console
	GOOGLE_CLIENT_SECRET	Google Cloud Console
Stripe	STRIPE_SECRET_KEY	Stripe Dashboard
	NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY	Stripe Dashboard
	STRIPE_WEBHOOK_SECRET	Webhook signing secret
AI	MUAPIAPP_API_KEY	Get from muapi.ai

🚀 Vercel Deployment Steps

1. Database: Create a PostgreSQL instance (Supabase or Neon). Get the DATABASE_URL.
2. Import: Fork and import the repo into Vercel dashboard.
3. Environment Variables: Add all variables above in Vercel project settings.
4. Deploy: Vercel runs prisma generate && next build automatically.
5. Schema Push: Run npx prisma db push to sync tables.
6. Integrations:
   • Google OAuth: Enable callback https://your-app.vercel.app/api/auth/callback/google
   • Stripe Webhook: Point to https://your-app.vercel.app/api/stripe/webhook
   • MuAPI Webhook: Point to https://your-app.vercel.app/api/webhook/muapi

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🛠️ Local Development

Prerequisites

• Node.js v18+
• PostgreSQL connection URL (Supabase free tier works)
• ngrok (optional, for local webhook testing)

Setup

# 1. Clone
git clone https://github.com/SamurAIGPT/clearmark-ai
cd clearmark-ai

# 2. Install dependencies
npm install

# 3. Setup environment
cp .env.example .env
# Fill in your keys

# 4. Initialize database
npx prisma generate
npx prisma db push

# 5. Start dev server
npm run dev

Webhook Tip: Run ngrok http 3000 locally and set WEBHOOK_URL to the ngrok HTTPS URL.

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⚠️ Database Safety Warning (Shared Pool)

The database is shared across multiple applications. Running npx prisma db push on a clean schema will drop other apps' tables. Always follow the Pull-Declare-Push-Cleanup sequence:

1. npx prisma db pull — Introspect all existing tables into schema.prisma
2. Add your WatermarkRemoval model and its User relation
3. npx prisma db push --accept-data-loss — Safely add new tables only
4. Clean schema.prisma to keep only Account, Session, User, VerificationToken, WatermarkRemoval
5. npx prisma generate — Rebuild the type-safe Prisma client

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🏗️ Technical Architecture

clearmark-ai/
├── prisma.config.ts          # Dynamic datasource for Prisma v7
├── prisma/
│   └── schema.prisma         # WatermarkRemoval model + NextAuth tables
├── src/
│   ├── app/
│   │   ├── page.js           # AI Studio workspace (upload, scenario, prompt, result)
│   │   ├── gallery/page.js   # Personal gallery with before/after modal
│   │   ├── pricing/page.js   # 4-plan credit pricing grid
│   │   └── api/
│   │       ├── auth/         # NextAuth handler
│   │       ├── upload/       # MuAPI CDN upload proxy
│   │       ├── generation/   # Credit deduction + gpt-image-2-image-to-image trigger
│   │       ├── creations/    # GET / DELETE with self-healing polling
│   │       ├── download/     # Server-side CORS-bypass download proxy
│   │       ├── webhook/muapi/ # Async MuAPI callback handler
│   │       └── stripe/       # Checkout + webhook
│   ├── components/
│   │   ├── Providers.jsx     # NextAuth SessionProvider
│   │   └── layout/Navbar.jsx # Sticky header with hamburger, credits, Vercel deploy
│   └── lib/
│       ├── auth.js           # NextAuth config
│       ├── config.js         # API keys, credit cost (18), plans
│       ├── prisma.js         # Cached Prisma singleton
│       ├── stripe.js         # Stripe instance
│       └── services/
│           ├── user.js       # Credit management
│           └── billing.js    # Stripe checkout + webhook handler
└── next.config.mjs           # Image remote patterns

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📄 License

MIT Licensed.

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ClearMark AI: A premium, dark-themed AI watermark removal SaaS built with the Inter font family and GPT Image 2.