diff --git a/share/completions/lz4.fish b/share/completions/lz4.fish
new file mode 100644
index 000000000..3bd35ef58
--- /dev/null
+++ b/share/completions/lz4.fish
@@ -0,0 +1,41 @@
+# Completions for lz4
+
+complete -c lz4 -s z -l compress -d "Compress (default)"
+complete -c lz4 -s d -l decompress -l uncompress -d "Decompress" -x -a "
+(
+    __fish_complete_suffix .lz4
+)
+"
+
+complete -c lz4 -s t -l test -d "Test the integrity"
+complete -c lz4 -l list -d "List information about .lz4 file(s)"
+
+for level in (seq 1 12)
+    complete -c lz4 -o $level -d "Set compression level"
+end
+
+complete -c lz4 -l fast -d "Ultra-fast compression"
+complete -c lz4 -l best -d "Highest compression, same as -12"
+complete -c lz4 -l favor-decSpeed -d "Generate file(s) optimized for decompression speed"
+complete -r -c lz4 -s D -d "Use specified file as dictionary"
+complete -c lz4 -s f -l force -d "Overwrite without prompting"
+complete -c lz4 -s c -l stdout -l to-stdout -d "Force write to stdout"
+complete -c lz4 -s m -l multiple -d "Multiple input files"
+complete -c lz4 -s r -d "Recurse directories"
+complete -c lz4 -o B4 -d "Set block size to 64KB"
+complete -c lz4 -o B5 -d "Set block size to 256KB"
+complete -c lz4 -o B6 -d "Set block size to 1MB"
+complete -c lz4 -o B7 -d "Set block size to 4MB"
+complete -c lz4 -o BI -d "Block independence (default)"
+complete -c lz4 -o BD -d "Block dependency"
+complete -c lz4 -l no-frame-crc -d "Disable frame checksum"
+complete -c lz4 -l content-size -d "Header includes original size"
+complete -c lz4 -l sparse -d "Enable sparse mode"
+complete -c lz4 -l no-sparse -d "Disable sparse mode"
+complete -c lz4 -s v -l verbose -d "Be verbose"
+complete -c lz4 -s q -l quiet -d "Suppress warnings"
+complete -c lz4 -s h -l help -d "Show help"
+complete -c lz4 -s H -d "Show long help"
+complete -c lz4 -s V -l version -d "Show version"
+complete -c lz4 -s k -l keep -d "Keep input file(s) (default)"
+complete -c lz4 -l rm -d "Remove input file(s) after de/compression"
diff --git a/share/completions/lz4c.fish b/share/completions/lz4c.fish
new file mode 100644
index 000000000..9d5eeff61
--- /dev/null
+++ b/share/completions/lz4c.fish
@@ -0,0 +1,3 @@
+# Completions for lz4c
+
+complete -c lz4c -w lz4
diff --git a/share/completions/lz4cat.fish b/share/completions/lz4cat.fish
new file mode 100644
index 000000000..240b0e367
--- /dev/null
+++ b/share/completions/lz4cat.fish
@@ -0,0 +1,18 @@
+# Completions for lz4cat
+
+complete -c lz4cat -x -a "
+(
+    __fish_complete_suffix .lz4
+)
+"
+
+complete -c lz4cat -s t -l test -d "Test the integrity"
+complete -c lz4cat -l list -d "List information about .lz4 file(s)"
+complete -r -c lz4cat -s D -d "Use specified file as dictionary"
+complete -c lz4cat -l sparse -d "Enable sparse mode"
+complete -c lz4cat -l no-sparse -d "Disable sparse mode"
+complete -c lz4cat -s v -l verbose -d "Be verbose"
+complete -c lz4cat -s q -l quiet -d "Suppress warnings"
+complete -c lz4cat -s h -l help -d "Show help"
+complete -c lz4cat -s H -d "Show long help"
+complete -c lz4cat -s V -l version -d "Show version"
diff --git a/share/completions/unlz4.fish b/share/completions/unlz4.fish
new file mode 100644
index 000000000..a3abe6d07
--- /dev/null
+++ b/share/completions/unlz4.fish
@@ -0,0 +1,23 @@
+# Completions for unlz4
+
+complete -c unlz4 -x -a "
+(
+    __fish_complete_suffix .lz4
+)
+"
+
+complete -c unlz4 -s t -l test -d "Test the integrity"
+complete -c unlz4 -l list -d "List information about .lz4 file(s)"
+complete -r -c unlz4 -s D -d "Use specified file as dictionary"
+complete -c unlz4 -s f -l force -d "Overwrite without prompting"
+complete -c unlz4 -s c -l stdout -l to-stdout -d "Force write to stdout"
+complete -c unlz4 -s m -l multiple -d "Multiple input files"
+complete -c unlz4 -l sparse -d "Enable sparse mode"
+complete -c unlz4 -l no-sparse -d "Disable sparse mode"
+complete -c unlz4 -s v -l verbose -d "Be verbose"
+complete -c unlz4 -s q -l quiet -d "Suppress warnings"
+complete -c unlz4 -s h -l help -d "Show help"
+complete -c unlz4 -s H -d "Show long help"
+complete -c unlz4 -s V -l version -d "Show version"
+complete -c unlz4 -s k -l keep -d "Keep input file(s) (default)"
+complete -c unlz4 -l rm -d "Remove input file(s) after decompression"