Is there any debugger for OCaml?

Hello All,
I want to debug my OCaml code. please suggest me debugger for that.
I open the file in Visual Studio Code.

earlybird has good vscode integration afaik.

announcement post:
[ANN] ocamlearlybird 1.0.0 beta1 - Ecosystem - OCaml


after adding ocamlearlybird extension
I have this code in the launch.json file

"version": "0.2.0",
"configurations": [

        "name": "OCaml Debug",
        "type": "ocamlearlybird",
        "request": "launch",
        "program": "${workspaceFolder}/",
        "stopOnEntry": false,
        "yieldSteps": 4096,
        "onlyDebugGlob": "<${workspaceFolder}/**/*>"


but still, I get the error: unsupported file formate
how to solve this

I’m not sure as I don’t have vscode myself. Maybe someone who does have this setup can be of help ^^