Format.Select

A web app for converting images between formats. Upload an image and convert it to PNG, JPG, WebP, GIF, BMP, TIFF, AVIF, or ICO — with optional quality control.

Live at format.select

Features

• Drag-and-drop or file picker upload
• 8 output formats with quality slider (where supported)
• REST API with token auth for programmatic access
• Free and Pro tiers with usage tracking (Stripe billing)
• Password and Keycloak authentication (Lucia)
• Password reset via email (Mailgun)

Tech Stack

• Frontend: SvelteKit, Tailwind CSS, Flowbite Svelte
• Backend: SvelteKit (adapter-node), Express, MongoDB
• Auth: Lucia with MongoDB adapter
• Payments: Stripe (checkout, billing portal, webhooks)
• Deployment: Docker, DigitalOcean Kubernetes, GitHub Actions CI/CD

Development

npm install
npm run dev

Building

npm run build
node server.js

Deployment

Docker image is built and pushed to Docker Hub via GitHub Actions on push to main, then deployed to DigitalOcean Kubernetes. See .github/workflows/ and production-k8s.yaml.