# tmux.WindowFilter.MarshalJSON

- **Module:** tmux.WindowFilter
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-go/blob/52968a3181c1c9e6d1b26c565d4b170968ae61c0/tmux/filter_generated.go#L2396
- **Page:** https://libtmux.org/en/go/latest/reference/tmux-windowfilter-marshaljson/

```
tmux.WindowFilter.MarshalJSON() -> ([]byte, error)
```

MarshalJSON validates and encodes the window filter; failures wrap [ErrInvalidFilter].