
U-Ultra/Unity
Free online image & PDF processing — 72+ tools, 100+ formats
After months of building, I'm sharing U-Ultra/Unity — a free online toolkit for image and PDF processing.
What it does:
- 72+ tools across image editing and PDF manipulation
- 100+ format support (JPG, PNG, WebP, HEIC, RAW, PDF, DOCX, XLSX...)
- Handles files up to 5GB
- No download, no registration for basic use
Tech stack: FastAPI + Vue 3 + PostgreSQL + Redis + Celery on Docker. All file processing happens server-side with automatic cleanup after completion.
Monetization: Freemium. Free tier covers most use cases. Pro ($9.99/mo) and Unlimited ($29.99/mo) for power users.
Ask me anything about the tech, the business model, or building in public!
About
I got tired of the same loop: need to merge a PDF or resize an image, Google a tool, land on a nice-looking site… and immediately hit a "create an account to continue" or "3 free uses then $12/mo" wall. Most of these t

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