diff --git a/stdlib-candidate/std-rfc/str/dedent/mod.nu b/stdlib-candidate/std-rfc/str/dedent/mod.nu
new file mode 100644
index 0000000..fabc50f
--- /dev/null
+++ b/stdlib-candidate/std-rfc/str/dedent/mod.nu
@@ -0,0 +1,93 @@
+# Removes common indent from a multi-line string based on the number of spaces on the last line.
+# 
+# A.k.a. Unindent
+#
+# Example - Two leading spaces are removed from all lines:
+#
+# > let s = "
+#      Heading
+#        Indented Line
+#        Another Indented Line
+#
+#      Another Heading
+#      "
+# > $a | str dedent
+#
+# Heading
+#   Indented Line
+#   Another Indented Line
+#
+# Another Heading
+export def main []: string -> string {
+    let string = $in
+
+    if ($string | describe) != "string" {
+        let span = (view files | last)
+        error make {
+            msg: 'Requires multi-line string as pipeline input'
+            label: {
+                text: "err::pipeline_input"
+                span: {
+                    start: $span.start
+                    end: $span.end
+                }
+            }
+        }
+    }
+
+    if ($string !~ '(?ms)^\s*\n') {
+        return (error make {
+            msg: 'First line must be empty'
+        })
+    }
+
+    if ($string !~ '(?ms)\n\s*$') {
+        return (error make {
+            msg: 'Last line must contain only whitespace indicating the dedent'
+        })
+     }
+
+    # Get number of spaces on the last line
+    let indent = $string
+        | str replace -r '(?ms).*\n( *)$' '$1'
+        | str length
+
+    # Skip the first and last lines
+    let lines = (
+        $string
+        | str replace -r '(?ms)^[^\n]*\n(.*)\n[^\n]*$' '$1'
+          # Use `split` instead of `lines`, since `lines` will
+          # drop legitimate trailing empty lines
+        | split row "\n"
+        | enumerate
+        | rename lineNumber text
+    )
+
+    let spaces = ('' | fill -c ' ' -w $indent)
+
+    # Has to be done outside the replacement block or the error
+    # is converted to text. This is probably a Nushell bug, and
+    # this code can be recombined with the next iterator when
+    # the Nushell behavior is fixed.
+    for line in $lines {
+        if ($line.text !~ '^\s*$') and ($line.text | str index-of --range 0..($indent) $spaces) == -1 {
+            error make {
+                msg: $"Line ($line.lineNumber + 1) must be indented by ($indent) or more spaces."
+            }
+        }
+    }
+
+    $lines
+    | each {|line|
+        # Don't operate on lines containing only whitespace
+        if ($line.text !~ '^\s*$') {
+            $line.text | str replace $spaces ''
+        } else {
+            $line.text
+        }
+      }
+    | to text
+      # Remove the trailing newline which indicated
+      # indent level
+    | str replace -r '(?ms)(.*)\n$' '$1'
+}
\ No newline at end of file
diff --git a/stdlib-candidate/std-rfc/str/mod.nu b/stdlib-candidate/std-rfc/str/mod.nu
index fbff9d9..9dbbcb2 100644
--- a/stdlib-candidate/std-rfc/str/mod.nu
+++ b/stdlib-candidate/std-rfc/str/mod.nu
@@ -1 +1,2 @@
 export use xpend.nu *
+export use dedent *
diff --git a/stdlib-candidate/tests/mod.nu b/stdlib-candidate/tests/mod.nu
index 34dc62f..42fc3a4 100644
--- a/stdlib-candidate/tests/mod.nu
+++ b/stdlib-candidate/tests/mod.nu
@@ -3,3 +3,4 @@ export module record.nu
 export module str_xpend.nu
 export module math.nu
 export module bench.nu
+export module str_dedent.nu
diff --git a/stdlib-candidate/tests/str_dedent.nu b/stdlib-candidate/tests/str_dedent.nu
new file mode 100644
index 0000000..0f6c8ef
--- /dev/null
+++ b/stdlib-candidate/tests/str_dedent.nu
@@ -0,0 +1,128 @@
+use std assert
+use ../std-rfc str
+
+export def "test str dedent" [] {
+    
+    # Test 1:
+    # Should start with "Heading" in the first character position
+    # Should not end with a line-break
+    # The blank line has no extra spaces
+    assert equal (
+        do {
+            let s = "   
+                Heading
+
+                    one
+                    two
+                "
+            $s | str dedent
+        }
+    ) "Heading\n\n    one\n    two"
+
+    # Test 2:
+    # Same as #1, but the blank line has leftover whitespace
+    # indentation (16 spaces) which is left in the result
+    assert equal (
+        do {
+            let s = "   
+                Heading
+                
+                    one
+                    two
+                "
+            $s | str dedent
+        }
+    ) "Heading\n                \n    one\n    two"
+
+    # Test 3:
+    # Same, but with a single tab character on the "blank" line
+    assert equal (
+        do {
+            let s = "   
+                Heading
+\t
+                    one
+                    two
+                "
+            $s | str dedent
+        }
+    ) "Heading\n\t\n    one\n    two"
+
+    # Test 4:
+    # Ends with line-break
+    assert equal (
+        do {
+            let s = "   
+                Heading
+
+                    one
+                    two
+
+                "
+            $s | str dedent
+        }
+    ) "Heading\n\n    one\n    two\n"
+
+    # Test 5:
+    # Identity - Returns the original string sans first and last empty lines
+    # No other whitespace should be removed
+    assert equal (
+        do {
+            let s = "\n  Identity  \n"
+            $s | str dedent
+        }
+    ) "  Identity  "
+
+    # Test 6:
+    # Error - Does not contain an empty first line
+    assert error {||
+        let s = "Error"
+        $s | str dedent
+    }
+
+    # Test 7:
+    # Error - Does not contain an empty last line
+    assert error {||
+        let s = "
+            Error"
+        $s | str dedent
+    }
+
+    # Test 8:
+    # Error - Line 1 does not have enough indentation
+    assert error {||
+        let s = "   
+           Line 1
+            Line 2
+            "
+        $s | str dedent
+    }
+
+    # Test 8:
+    # Error - Line 2 does not have enough indentation
+    assert error {||
+        let s = "   
+            Line 1
+           Line 2
+            "
+        $s | str dedent
+    }
+
+    # Test 9:
+    # Error - Line does not have enough indentation
+    assert error {||
+        let s = "   
+           Line  
+            "
+        $s | str dedent
+    }
+
+    # Test 10:
+    # "Hidden" whitespace on the first line is allowed
+    assert equal (
+        do {
+            let s = "   \t \n  Identity  \n"
+            $s | str dedent
+        }
+    ) "  Identity  "
+}
\ No newline at end of file