How I Built a Free Online Image & PDF Processing Platform with Vue 3 + FastAPI

Short summary

After 6 months building iamuu, a free image/PDF platform with 100+ format conversions and 40+ tools, the author shares hard technical challenges solved: CMYK color preservation, 5GB file streaming without memory loading, HEIC/RAW conversion, PDF digital signatures, and 10-language i18n without UI flash. Stack: Vue 3, FastAPI, Celery/Redis, MinIO, PostgreSQL. Core insight: user trust (privacy, no watermarks) beats feature count.

• •Solo developer built iamuu over 6 months with 100+ image conversions and 40+ PDF tools including OCR and background removal
• •Technical deep-dives solved production hard problems: CMYK preservation, 5GB streaming, HEIC/RAW conversion, PKCS#12 digital signatures, and i18n prerendering
• •Tech stack: Vue 3 + TypeScript frontend, FastAPI backend, Celery/Redis queues, MinIO object storage, PostgreSQL—deployed via Docker Compose

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