How to Sell Code Online: A Developer's Guide to Passive Income

Your Side Projects Have Value

That SaaS boilerplate you built for your last project? Other developers need exactly that. The component library you refined over months? Someone would pay good money for it.

The code marketplace model lets you sell your work repeatedly — write once, earn every time someone buys it.

What Sells Well

Based on what developers actually buy:

High Demand

Next.js SaaS starters with auth, payments, and database — £40–100

Admin dashboards with charts and data tables — £30–60

Authentication systems with multiple providers — £20–50

E-commerce templates with Stripe checkout — £50–130

Landing page kits with 5–10 responsive sections — £15–30

Growing Demand

AI/ML interfaces — chat UIs, RAG pipelines — £40–80

Chrome extensions with Manifest V3 — £15–30

CLI tools and developer utilities — £10–25

Mobile app templates with React Native or Flutter — £30–70

How to Package Your Code

Clean up — remove hardcoded values, add environment variables

Document — README with setup instructions, screenshots, and API docs

Test — add at least basic test coverage

Type — use TypeScript for buyer confidence

License — include a clear license file

Pricing Strategy

Price based on the time you save the buyer, not the time you spent building. A SaaS starter that saves 80+ hours of setup is easily worth £50–100 even if it took you a weekend.

Why Quality Scores Matter for Sellers

On CodeCudos, every listing gets an automated quality analysis. Higher scores mean:

More visibility in search results

Higher buyer confidence

Better conversion rates

Fewer refund requests

Upload your code, get scored, and start earning. Sellers keep 90% of every sale.