STRING-UPPER(1) fish-shell STRING-UPPER(1)

# [NAME](#NAME)

string-upper - convert strings to uppercase

# [SYNOPSIS](#SYNOPSIS)

```
string upper [-q | --quiet] [STRING ...]
```

# [DESCRIPTION](#DESCRIPTION)

**string upper** converts each string argument to uppercase. Exit status: 0 if at least one string was converted to uppercase, else 1. This means that in conjunction with the **-q** flag you can readily test whether a string is already uppercase.

# [Copyright](#Copyright)

fish-shell developers

October 10, 2026 4.9

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Document: string-upper(1) from fish 4.9.3-r1 (Chainguard OS)
Source: https://github.com/fish-shell/fish-shell