Inspiration
Working with APIs and raw data constantly, I found myself repeatedly needing to convert complex JSON payloads into readable spreadsheets for clients and non-technical team members. The existing tools out there were frustrating. They were either cluttered with ads, required mandatory account signups, or raised serious data privacy concerns. I wanted to build a clean, instant utility that solved this exact problem without getting in the way.
What it does
JSON Support is a web application and developer API that instantly converts JSON and CSV data into clean, formatted Excel spreadsheets. The core platform requires zero account registration and guarantees privacy by never storing your data.
Beyond the manual web interface, it provides:
- A developer API for automated conversions.
- Reverse conversion capabilities to turn Excel and CSV files back into JSON.
- A standalone JSON formatter and validator.
- Inbound webhooks for seamless no-code automation with tools like Zapier.
How I built it
I focused on creating a lightweight frontend that processes manual uploads quickly and efficiently. To guarantee data privacy, the manual conversion happens instantly without saving files to a database. For the developer side, I built a robust backend architecture to support the API and inbound webhooks, implementing strict rate limiting to keep the free tier sustainable while offering paid tiers for heavy production use.
Challenges I ran into
One of the biggest hurdles was optimizing the parsing engine to handle large or deeply nested JSON files without causing the user's browser to freeze or crash. Another major technical challenge was designing the webhook infrastructure to reliably handle rapid, concurrent automated requests from platforms like Zapier without dropping any data.
Accomplishments that I'm proud of
I am incredibly proud of keeping the core tool completely free and accessible without a login wall. Getting the reverse conversion feature working flawlessly was also a major milestone. Above all, building a tool that strictly respects user privacy by not storing uploaded data is something I consider a huge win.
What I learned
Building JSON Support taught me a massive amount about efficient data parsing, stream processing, and handling edge cases in poorly formatted JSON strings. Balancing a reliable free API tier with infrastructure costs also gave me practical experience in API rate limiting and server resource management.
What's next for JSON Support
The immediate next step is expanding the API capabilities and adding more native no-code integrations to make automated workflows even easier. I am also exploring support for additional data formats like XML and working on giving users more control over how their final Excel spreadsheets are visually formatted.
Built With
- nextjs
- postgresql
- tailwind
- vercel
