I Built 100 Free Developer Tools with ASP.NET Core 9 and 5 Languages
Over the last few weeks, I challenged myself to build a collection of developer tools instead of another SaaS project.
The goal was simple:
- Build useful tools.
- Keep everything fast.
- Support multiple languages.
- Avoid unnecessary complexity.
- Focus on long-term SEO and organic traffic.
Why?
As developers, we constantly search for things like:
- JSON Formatter
- Base64 Encoder
- GUID Generator
- Password Generator
- Regex Tester
- XML Formatter
- Timestamp Converter
Most of these tools already exist, but I wanted to create my own platform and learn more about large-scale content architecture.
Technology Stack
The project is built with:
- ASP.NET Core 9 MVC
- C#
- JavaScript
- IIS
- Windows Server
- Cloudflare
No database is required for the current version. Tool metadata and translations are managed in JSON files.
Supporting Multiple Languages
One of my main goals was making the website multilingual from day one.
Current languages:
- English
- Turkish
- German
- Spanish
- French
This means that 100 tools instantly became 500 indexable pages.
Keeping Things Simple
I intentionally avoided adding:
- Membership systems
- Premium plans
- Complex APIs
- Microservices
- Docker
I wanted the project to remain lightweight and easy to maintain.
Scaling to 1000 Tools
The current version contains 100 tools, but the long-term target is 1000+.
Categories include:
- JSON Tools
- XML Tools
- Text Tools
- Security Tools
- Encoding Tools
- Date & Time Tools
- Generator Tools
- SEO Tools
What I Learned
Building small utility websites is surprisingly fun.
Instead of chasing another dropshipping idea or SaaS product, creating useful tools feels much more sustainable.
The biggest lesson?
Consistency matters more than complexity.
Live Website
If you'd like to take a look, you can find the project here:
I would love to hear what categories or tools you think every developer website should have.