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SaaS · Web App · Document Tools · AI PlatformLive2025–2026Founder / Full-stack developer (in-house)

PDF AI

Document & Image Intelligence Platform

61+ free document & image tools — merge, convert, AI analysis, and more. Processed in your browser when possible · Enterprise-grade AI features.

Next.jsReactTypeScriptTailwindPDFSaaSAIVercelRailwayDockerSupabaseStripe
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About

Built as a modern alternative to iLovePDF/Smallpdf, PDF AI bundles 32 PDF tools, 21 image tools, 7 AI tools, and a Legal Vault into one fast Next.js app. Users can merge, split, rotate, protect, watermark, redact, sign, and convert documents without uploading sensitive files to third-party APIs when browser processing is enough. Standout technical work includes real PDF password protect/unlock (AES-256 via cryptpdf, optional qpdf), PDF→Word/Excel/PowerPoint through a self-hosted Stirling-PDF backend on Railway (LibreOffice + Tabula — no paid conversion API), a shared tool workspace UI with drag-and-drop uploads and processing overlays, and architecture ready for Supabase auth, Stripe billing, and OpenAI-powered AI tools. Deployed on Vercel with a separate Stirling-PDF Docker service on Railway for Office conversions.

Tool Breakdown

PDF Tools (32)
Merge, Split, Rotate, Protect, Unlock, Watermark, PDF→Word/Excel/PPT, OCR, Redact, Sign, and more
Image Tools (21)
Compress, Crop, Resize, AI Upscale, QR, Favicon, Collage, Remove Background, and more
AI Tools (7)
Chat with PDF, Multi-Doc Synthesis, Semantic Search, Smart Redaction, Translate, Smart Form Fill
Legal Vault (1)
Metadata stripper — browser-only, no server upload

Architecture

Browser → Next.js (Vercel or localhost:3000) → API routes → Stirling-PDF on Railway for Office conversion. Separate deployments: (1) Next.js app at pdftoimg-steel.vercel.app (2) Stirling at pdftoimg-production-d52d.up.railway.app

Key Features

61 Tools32 PDF + 21 Image + 7 AI + Legal Vault in one platform
Browser-first Privacypdf-lib, pdf.js, canvas — files stay local when possible
Real PDF Encrypt/DecryptAES-256 via cryptpdf — not fake metadata-only protection
Office ConversionPDF → DOCX / XLSX / PPTX via open-source Stirling-PDF on Railway
Shared Workspace UIDrag-and-drop uploads, file previews, loaders, page picker
Modern StackNext.js 15 + React 19 + Tailwind — production on Vercel
Monetization-readyStripe webhooks, AI credits, Pro tier schema (Supabase)
Legal VaultBrowser-only metadata stripper for sensitive documents

Who It Helps

  • •Students & professionals — merge, split, and convert documents daily
  • •Small businesses — watermark, protect, and batch-process PDFs without subscriptions
  • •Legal & compliance teams — metadata stripping and redaction workflows
  • •Developers — open-source stack, self-hosted Stirling-PDF, GitHub repo
  • •Privacy-conscious users — browser-first processing avoids third-party uploads
  • •Teams needing Office conversion — PDF to Word/Excel/PowerPoint without paid APIs

How It Works

  1. 1Open pdftoimg-steel.vercel.app and pick a tool from the homepage grid.
  2. 2Drag-and-drop your file into the shared workspace UI.
  3. 3Processing runs in-browser (pdf-lib/pdf.js) or via API routes when needed.
  4. 4Office conversions route to Stirling-PDF on Railway (LibreOffice + Tabula).
  5. 5Download the result — no account required for most free tools.

Pricing (USD)

Free
$0
61 tools, browser PDF/image processing, protect/unlock API, Office conversion
Pro
Soon
AI credits, Chat with PDF, Stripe billing — schema & routes ready

Tech Stack

Frontend
Next.js 15, React 19, TypeScript, Tailwind CSS, Lucide icons
PDF (browser)
pdf-lib, pdf.js, jszip
PDF (server)
cryptpdf, node-qpdf2, Stirling-PDF HTTP API
Backend services
Supabase (auth/DB/pgvector), OpenAI API, Stripe
Infrastructure
Vercel (Next.js app), Railway (Stirling-PDF Docker)
DevOps
Docker Compose for local Stirling, GitHub CI-ready structure

Why PDF AI

vs iLovePDF / Smallpdf
  • Browser-first privacy
  • Real AES encryption
  • Self-hosted Office conversion — no paid API
vs Desktop PDF apps
  • No install required
  • 61 tools in one tab
  • Free tier with full tool access
vs Basic online converters
  • AI document workflows
  • Legal metadata stripper
  • Production architecture on Vercel + Railway

Project Status

✅ Shipped
  • • 61 tools UI with shared workspace
  • • Browser PDF/image processing
  • • Protect/unlock API (AES-256)
  • • Stirling-PDF Office conversion
  • • Vercel deploy + Railway Stirling backend
⚙️ Phase 2
  • • Supabase auth login (schema ready)
  • • OpenAI keys for AI tools (routes exist)
  • • Stripe live billing (webhooks ready)

Links

Visit Live SiteGitHubStirling Backend
WhatsApp CRMCamToCode