diff --git a/data/APIs_Data_and_ML.md b/data/APIs_Data_and_ML.md
index ed9eb66..139ec1e 100644
--- a/data/APIs_Data_and_ML.md
+++ b/data/APIs_Data_and_ML.md
@@ -47,4 +47,5 @@
 | [SerpApi](https://serpapi.com) | Real-time search engine scraping API. Returns structured JSON results for Google, YouTube, Bing, Baidu, Walmart, and many other engines. Free plan includes 100 successful API calls per month. |
 | [Sheetson](https://sheetson.com) | Instantly turn any Google Sheets into a RESTful API. Free plan available. |
 | [Shipyard](https://www.shipyardapp.com) | Low-code data orchestration platform for the cloud. Build with a mix of low-code templates and your code (Python, Node.js, Bash, SQL). Our free developer plan offers 10 hours of runtime every month for one user, more than enough to automate multiple workflows. |
+| [Stackiox](https://stackiox.com) | Free browser-based developer tools — JSON formatter, YAML/JSON/CSV/XML converters, JWT decoder, cron generator, and more. Client-side, no signup, no tracking. |
 | [YAMLine](https://yamline.com/) | YAML tools for formatting, validating, comparing, and converting YAML files. |