Hey fellow developers!
I'm Daniel, and I want to share something I've been working on that's actually made my daily coding life much easier. You know how it is, you're in the middle of coding, you need to format some JSON, generate a password, or create a QR code, and you end up opening 8 different tabs to find the right tools?
Well, I got tired of that. So I built my own collection of tools that I actually use every single day. And the best part? They're all 100% free, no registration required, and privacy-focused.
Let me show you what I've built:
The Problem I Solved
As a developer, I found myself constantly switching between different online tools for basic tasks:
- Need to format JSON? → Google search → Find a tool → Hope it's not sketchy
- Want to generate a secure password? → Another search → Another tool
- Need to convert SVG to React component? → Yet another search...
This was getting ridiculous. So I decided to build my own toolkit that I could trust and actually enjoy using.
My Solution: Konverter Online
I created Konverter Online - a collection of 8 essential developer tools that I use daily. Here's what I built:
1. SVG Converter
Link: https://www.konverter-online.com
This is my baby - the tool that started it all. I was tired of manually converting SVGs to CSS backgrounds and React components. Now I just drag & drop an SVG and get:
- CSS with URL-encoded SVG
- CSS with Base64
- Functional React/JSX component
- Optimized SVG (smaller file size)
2. JSON Formatter
Link: https://www.konverter-online.com/json-formatter
Every developer needs this. I built it with syntax highlighting and real-time error detection. It's saved me countless hours debugging malformed JSON.
Pro tip: The error highlighting shows you exactly where the syntax error is - no more guessing!
3. CSS Minifier
Link: https://www.konverter-online.com/css-minifier
I was using online CSS minifiers that felt sketchy. Now I have my own that I trust. It removes comments, compresses selectors, and shows you the exact size reduction.
Why it's better: Real-time size comparison so you can see the impact immediately.
4. Base64 Converter
Link: https://www.konverter-online.com/base64-converter
This one I use surprisingly often - for embedding images in CSS, encoding API responses, you name it. It handles text, files, and images.
Cool feature: URL-safe encoding option for when you need to use Base64 in URLs.
5. Color Generator
Link: https://www.konverter-online.com/color-generator
I'm not a designer, but I need good colors for my projects. This tool extracts beautiful color palettes from images and gives me HEX, RGB, and HSL values.
How I use it: Upload a screenshot of a design I like, extract the colors, and use them in my projects.
6. Password Generator
Link: https://www.konverter-online.com/password-generator
I built this because I was tired of weak password generators. This one includes:
- Real-time strength analysis
- Entropy calculation
- Estimated crack time
- Option to exclude similar characters (like 0 and O)
Security nerd moment: The entropy calculation is based on actual cryptographic principles, not just "strong/weak" labels.
7. QR Code Generator
Link: https://www.konverter-online.com/qr-generator
I use this for sharing links, WiFi passwords, and even contact information. The best part? You can add your logo in the center.
Pro tip: The error correction feature means your QR code still works even if part of it gets covered or damaged.
8. URL Shortener
Link: https://www.konverter-online.com/url-shortener
I built this for sharing links in presentations and social media. It includes QR code generation and click tracking.
Why I love it: No ads, no tracking, just clean short URLs.
Tech Stack (Because You Asked)
I built everything with:
- Next.js 14 with App Router (for that sweet performance)
- TypeScript (because I'm not a monster)
- Tailwind CSS (for rapid development)
- shadcn/ui (for beautiful components)
Why I Built These Tools
- I actually use them - These aren't just portfolio projects, I use them daily
- Privacy-focused - No data collection, no tracking, no ads
- 100% free - No hidden costs, no premium features
- Mobile responsive - Because I'm often on my phone
- Fast - Built with modern web technologies for optimal performance
Try Them Out
All tools are live at https://www.konverter-online.com
I'd love to hear what you think! Which tool would be most useful for your daily workflow? Any features you'd like to see added?
Open Source
The entire project is open source on GitHub: https://github.com/coronasco/konverter
Contributions are welcome! I'm always looking to improve these tools based on real developer needs.
Final Thoughts
Building tools that you actually use is incredibly rewarding. It's not just about the code - it's about solving real problems that make your daily development workflow smoother.
If you're thinking about building your own tools, my advice is: start with something you actually need. Don't build for the sake of building. Build to solve a real problem you face every day.
What tools do you wish existed? What's your daily workflow pain point? I'd love to hear about it in the comments!
Happy coding!
P.S. If you found any of these tools useful, consider giving the GitHub repo a star. It really helps with motivation! ⭐
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