diff --git a/share/completions/pzstd.fish b/share/completions/pzstd.fish
new file mode 100644
index 000000000..8366359f6
--- /dev/null
+++ b/share/completions/pzstd.fish
@@ -0,0 +1,32 @@
+# Completions for pzstd
+
+complete -c pzstd -s d -l decompress -d "Decompress" -x -a "
+(
+    __fish_complete_suffix .zst
+)
+"
+
+complete -c pzstd -s t -l test -d "Test the integrity"
+
+for level in (seq 1 19)
+    complete -c pzstd -o $level -d "Set compression level"
+end
+
+complete -c pzstd -l ultra -d "Enable compression level beyond 19"
+
+for threads in (seq 1 (count (cat /proc/cpuinfo | string match -r "processor")))
+    complete -x -c pzstd -s p -l processes -a "$threads" -d "De/compress using $threads working threads"
+end
+
+complete -r -c pzstd -s o -d "Specify file to save"
+complete -c pzstd -s f -l force -d "Overwrite without prompting"
+complete -c pzstd -s c -l stdout -d "Force write to stdout"
+complete -c pzstd -l rm -d "Remove input file(s) after de/compression"
+complete -c pzstd -s k -l keep -d "Keep input file(s) (default)"
+complete -c pzstd -s r -d "Recurse directories"
+complete -c pzstd -s h -l help -d "Show help"
+complete -c pzstd -s H -d "Show long help"
+complete -c pzstd -s V -l version -d "Show version"
+complete -c pzstd -s v -l verbose -d "Be verbose"
+complete -c pzstd -s q -l quiet -d "Suppress warnings"
+complete -c pzstd -l no-check -d "Disable integrity check"
diff --git a/share/completions/unzstd.fish b/share/completions/unzstd.fish
new file mode 100644
index 000000000..1a930a35f
--- /dev/null
+++ b/share/completions/unzstd.fish
@@ -0,0 +1,35 @@
+# Completions for unzstd
+
+complete -c unzstd -x -a "
+(
+    __fish_complete_suffix .zst
+)
+"
+
+complete -c unzstd -s t -l test -d "Test the integrity"
+complete -r -c unzstd -l train -d "Create a dictionary from specified file(s)"
+complete -c unzstd -s l -l list -d "List information about .zst file(s)"
+complete -c unzstd -l long -d "Enable long distance matching with specified windowLog"
+complete -c unzstd -l single-thread -d "Single-thread mode"
+complete -r -c unzstd -s D -d "Use specified file as dictionary"
+complete -r -c unzstd -s o -d "Specify file to save"
+complete -c unzstd -s f -l force -d "Overwrite without prompting"
+complete -c unzstd -s c -l stdout -d "Force write to stdout"
+complete -c unzstd -l sparse -d "Enable sparse mode"
+complete -c unzstd -l no-sparse -d "Disable sparse mode"
+complete -c unzstd -l rm -d "Remove input file(s) after decompression"
+complete -c unzstd -s k -l keep -d "Keep input file(s) (default)"
+complete -c unzstd -s r -d "Recurse directories"
+complete -c unzstd -l filelist -d "Read a list of files"
+complete -c unzstd -l output-dir-flat -d "Specify a directory to output all files"
+
+for format in zstd gzip xz lzma lz4
+    complete -c unzstd -l format="$format" -d "Specify the format to use for decompression"
+end
+
+complete -c unzstd -s h -l help -d "Show help"
+complete -c unzstd -s H -d "Show long help"
+complete -c unzstd -s V -l version -d "Show version"
+complete -c unzstd -s v -l verbose -d "Be verbose"
+complete -c unzstd -s q -l quiet -d "Suppress warnings"
+complete -c unzstd -l no-progress -d "Do not show the progress bar"
diff --git a/share/completions/zstd.fish b/share/completions/zstd.fish
new file mode 100644
index 000000000..39ce7a3a5
--- /dev/null
+++ b/share/completions/zstd.fish
@@ -0,0 +1,58 @@
+# Completions for zstd
+
+complete -c zstd -s z -l compress -d "Compress (default)"
+complete -c zstd -s d -l decompress -l uncompress -d "Decompress" -x -a "
+(
+    __fish_complete_suffix .zst
+)
+"
+
+complete -c zstd -s t -l test -d "Test the integrity"
+complete -r -c zstd -l train -d "Create a dictionary from specified file(s)"
+complete -c zstd -s l -l list -d "List information about .zst file(s)"
+
+for level in (seq 1 19)
+    complete -c zstd -o $level -d "Set compression level"
+end
+
+complete -c zstd -l fast -d "Ultra-fast compression"
+complete -c zstd -l ultra -d "Enable compression level beyond 19"
+complete -c zstd -l long -d "Enable long distance matching with specified windowLog"
+
+for threads in (seq 0 (count (cat /proc/cpuinfo | string match -r "processor")))
+    if test $threads -eq 0
+        complete -c zstd -o T"$threads" -l threads="$threads" -d "Compress using as many threads as there are CPU cores on the system"
+    else
+        complete -c zstd -o T"$threads" -l threads="$threads" -d "Compress using $threads working threads"
+    end
+end
+
+complete -c zstd -l single-thread -d "Single-thread mode"
+complete -c zstd -l adapt -d "Dynamically adapt compression level to I/O conditions"
+complete -c zstd -l stream-size -d "Optimize compression parameters for streaming input of specified bytes"
+complete -c zstd -l size-hint -d "Optimize compression parameters for streaming input of approximately this size"
+complete -c zstd -l rsyncable -d "Compress using a rsync-friendly method"
+complete -r -c zstd -s D -d "Use specified file as dictionary"
+complete -c zstd -l no-dictID -d "Do not write dictID into header"
+complete -r -c zstd -s o -d "Specify file to save"
+complete -c zstd -s f -l force -d "Overwrite without prompting"
+complete -c zstd -s c -l stdout -d "Force write to stdout"
+complete -c zstd -l sparse -d "Enable sparse mode"
+complete -c zstd -l no-sparse -d "Disable sparse mode"
+complete -c zstd -l rm -d "Remove input file(s) after de/compression"
+complete -c zstd -s k -l keep -d "Keep input file(s) (default)"
+complete -c zstd -s r -d "Recurse directories"
+complete -c zstd -l filelist -d "Read a list of files"
+complete -c zstd -l output-dir-flat -d "Specify a directory to output all files"
+
+for format in zstd gzip xz lzma lz4
+    complete -c zstd -l format="$format" -d "Specify the format to use for compression"
+end
+
+complete -c zstd -s h -l help -d "Show help"
+complete -c zstd -s H -d "Show long help"
+complete -c zstd -s V -l version -d "Show version"
+complete -c zstd -s v -l verbose -d "Be verbose"
+complete -c zstd -s q -l quiet -d "Suppress warnings"
+complete -c zstd -l no-progress -d "Do not show the progress bar"
+complete -c zstd -l no-check -d "Disable integrity check"
diff --git a/share/completions/zstdcat.fish b/share/completions/zstdcat.fish
new file mode 100644
index 000000000..0eff2939e
--- /dev/null
+++ b/share/completions/zstdcat.fish
@@ -0,0 +1,28 @@
+# Completions for zstdcat
+
+complete -c zstdcat -x -a "
+(
+    __fish_complete_suffix .zst
+)
+"
+
+complete -c zstdcat -s t -l test -d "Test the integrity"
+complete -c zstdcat -s l -l list -d "List information about .zst file(s)"
+complete -c zstdcat -l long -d "Enable long distance matching with specified windowLog"
+complete -c zstdcat -l single-thread -d "Single-thread mode"
+complete -r -c zstdcat -s D -d "Use specified file as dictionary"
+complete -c zstdcat -l sparse -d "Enable sparse mode"
+complete -c zstdcat -l no-sparse -d "Disable sparse mode"
+complete -c zstdcat -s r -d "Recurse directories"
+complete -c zstdcat -l filelist -d "Read a list of files"
+
+for format in zstd gzip xz lzma lz4
+    complete -c zstdcat -l format="$format" -d "Specify the format to use for decompression"
+end
+
+complete -c zstdcat -s h -l help -d "Show help"
+complete -c zstdcat -s H -d "Show long help"
+complete -c zstdcat -s V -l version -d "Show version"
+complete -c zstdcat -s v -l verbose -d "Be verbose"
+complete -c zstdcat -s q -l quiet -d "Suppress warnings"
+complete -c zstdcat -l no-progress -d "Do not show the progress bar"
diff --git a/share/completions/zstdgrep.fish b/share/completions/zstdgrep.fish
new file mode 100644
index 000000000..7547ec47d
--- /dev/null
+++ b/share/completions/zstdgrep.fish
@@ -0,0 +1,3 @@
+# Completions for zstdgrep
+
+complete -c zstdgrep -w grep
diff --git a/share/completions/zstdless.fish b/share/completions/zstdless.fish
new file mode 100644
index 000000000..3381dbca5
--- /dev/null
+++ b/share/completions/zstdless.fish
@@ -0,0 +1,3 @@
+# Completions for zstdless
+
+complete -c zstdless -w zstdcat
diff --git a/share/completions/zstdmt.fish b/share/completions/zstdmt.fish
new file mode 100644
index 000000000..ed813bc1f
--- /dev/null
+++ b/share/completions/zstdmt.fish
@@ -0,0 +1,49 @@
+# Completions for zstdmt
+
+complete -c zstdmt -s z -l compress -d "Compress (default)"
+complete -c zstdmt -s d -l decompress -l uncompress -d "Decompress" -x -a "
+(
+    __fish_complete_suffix .zst
+)
+"
+
+complete -c zstdmt -s t -l test -d "Test the integrity"
+complete -r -c zstdmt -l train -d "Create a dictionary from specified file(s)"
+complete -c zstdmt -s l -l list -d "List information about .zst file(s)"
+
+for level in (seq 1 19)
+    complete -c zstdmt -o $level -d "Set compression level"
+end
+
+complete -c zstdmt -l fast -d "Ultra-fast compression"
+complete -c zstdmt -l ultra -d "Enable compression level beyond 19"
+complete -c zstdmt -l long -d "Enable long distance matching with specified windowLog"
+complete -c zstdmt -l single-thread -d "Single-thread mode"
+complete -c zstdmt -l adapt -d "Dynamically adapt compression level to I/O conditions"
+complete -c zstdmt -l stream-size -d "Optimize compression parameters for streaming input of specified bytes"
+complete -c zstdmt -l size-hint -d "Optimize compression parameters for streaming input of approximately this size"
+complete -c zstdmt -l rsyncable -d "Compress using a rsync-friendly method"
+complete -r -c zstdmt -s D -d "Use specified file as dictionary"
+complete -c zstdmt -l no-dictID -d "Do not write dictID into header"
+complete -r -c zstdmt -s o -d "Specify file to save"
+complete -c zstdmt -s f -l force -d "Overwrite without prompting"
+complete -c zstdmt -s c -l stdout -d "Force write to stdout"
+complete -c zstdmt -l sparse -d "Enable sparse mode"
+complete -c zstdmt -l no-sparse -d "Disable sparse mode"
+complete -c zstdmt -l rm -d "Remove input file(s) after de/compression"
+complete -c zstdmt -s k -l keep -d "Keep input file(s) (default)"
+complete -c zstdmt -s r -d "Recurse directories"
+complete -c zstdmt -l filelist -d "Read a list of files"
+complete -c zstdmt -l output-dir-flat -d "Specify a directory to output all files"
+
+for format in zstd gzip xz lzma lz4
+    complete -c zstdmt -l format="$format" -d "Specify the format to use for compression"
+end
+
+complete -c zstdmt -s h -l help -d "Show help"
+complete -c zstdmt -s H -d "Show long help"
+complete -c zstdmt -s V -l version -d "Show version"
+complete -c zstdmt -s v -l verbose -d "Be verbose"
+complete -c zstdmt -s q -l quiet -d "Suppress warnings"
+complete -c zstdmt -l no-progress -d "Do not show the progress bar"
+complete -c zstdmt -l no-check -d "Disable integrity check"