SacarArchivosDeEmail.online: batch attachment extraction + monetization
MVP to extract email attachments in bulk and monetize with sponsored slots.
Step 01
Problem
Non-technical users needed to extract many attachments without complex desktop tooling.
Step 02
Context and constraints
Web service born from a real workplace need, focused on immediate utility and SEO long-tail.
Role: End-to-end builder: backend, product, technical SEO, monetization, and admin panel.
Step 03
Key decisions
- Main flow with drag-and-drop, visible progress, and automatic ZIP download.
- Revenue model with low-cost sponsored slots to validate monetization without friction.
- Robust persistence to avoid state loss across redeploys.
Step 04
Outcomes
- Functional tool that solves a repetitive problem in minutes.
- Fast transition from internal automation to public web product.
- First practical Stripe charging system to experiment with real monetization.
Metrics
- Current upload limits: up to 300 files per run, 50MB max per file.
- Commercial inventory: 6 simultaneous sponsorship slots.
- Format coverage: automatic parsing for eml/emlx/mime/mbox + manual handling for msg/winmail.dat.
Step 05
Learnings and next improvement
Learnings
- A small real problem can become a useful product for more people.
- Shipping early and improving iteratively accelerates both technical and business learning.
- Integrating Stripe payments early helps validate monetization before late-stage assumptions.
Next improvement
- Improve automatic coverage for
.msgandwinmail.dat. - Refine sponsorship experience to validate whether the 1 EUR/day model scales sustainably.
Link
Step 06
Visual resources
