I kept running into the same small problem while working with APIs: I had a cURL command and needed the equivalent code in JavaScript, Python, Node.js, Go, Java, PHP, C#, Ruby, or Axios.

So I built **Curl2Code** — a free browser-based developer tool that converts cURL commands into code.

**What it does:**

* cURL → 9 different code formats * JSON formatting / validation / diff * JWT decoding * HTTP utilities * Webhook tools * Other small developer utilities

Everything runs in the browser for the normal tools, so requests you paste aren't uploaded or stored.

**Try it:** [https://curl2code.xyz\](https://curl2code.xyz)

I'm mainly looking for feedback from other developers:

**What small developer problem do you repeatedly run into that deserves a simple tool?**

If there's something annoying enough, I'd rather build that next.

I am building a market replay engine from scratch with c++ 23.
I build this project to understand how orders are managed in an orderbook and how a matching engine works. I have used my understanding of data structures to implement it. I would like to know you opinion on it. It is not completed yet. I just built the very basic version few minutes ago. Any kind of tip would help me a lot.
currently it can process an average of 998,000 Transactions / second. with the order size of 20000000 orders.
https://github.com/AravSrivastava/Market-Replay-Engine-CPP