diff --git a/doc/Makefile.am b/doc/Makefile.am
index a9d34049..b8ae9a8b 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -58,7 +58,11 @@ EXTRA_DIST = \
 	_themes/sphinx_rtd_theme/static/js/theme.js \
 	_themes/sphinx_rtd_theme/static/css/theme.css \
 	_themes/sphinx_rtd_theme/static/css/badge_only.css \
-	$(man_MANS)
+	$(man_MANS) \
+	bash_completion/nghttp \
+	bash_completion/nghttpd \
+	bash_completion/nghttpx \
+	bash_completion/h2load
 
 # Makefile for Sphinx documentation
 #
diff --git a/doc/bash_completion/h2load b/doc/bash_completion/h2load
new file mode 100644
index 00000000..c8f42d46
--- /dev/null
+++ b/doc/bash_completion/h2load
@@ -0,0 +1,19 @@
+_h2load()
+{
+    local cur prev split=false
+    COMPREPLY=()
+    COMP_WORDBREAKS=${COMP_WORDBREAKS//=}
+
+    cmd=${COMP_WORDS[0]}
+    _get_comp_words_by_ref cur prev
+    case $cur in
+        -*)
+            COMPREPLY=( $( compgen -W '--threads --connection-window-bits --input-file --help --requests --verbose --version --window-bits --clients --no-tls-proto --header --max-concurrent-streams ' -- "$cur" ) )
+            ;;
+        *)
+            _filedir
+            return 0
+    esac
+    return 0
+}
+complete -F _h2load h2load
diff --git a/doc/bash_completion/make_bash_completion.py b/doc/bash_completion/make_bash_completion.py
new file mode 100755
index 00000000..5b19fc73
--- /dev/null
+++ b/doc/bash_completion/make_bash_completion.py
@@ -0,0 +1,74 @@
+#!/usr/bin/env python
+
+import subprocess
+from StringIO import StringIO
+import re
+import sys
+import os.path
+
+class Option:
+    def __init__(self, long_opt, short_opt):
+        self.long_opt = long_opt
+        self.short_opt = short_opt
+
+def get_all_options(cmd):
+    opt_pattern = re.compile(r'  (?:(-.), )?(--[^\s\[=]+)(\[)?')
+    proc = subprocess.Popen([cmd, "--help"], stdout=subprocess.PIPE)
+    stdoutdata, stderrdata = proc.communicate()
+    cur_option = None
+    opts = {}
+    for line in StringIO(stdoutdata):
+        match = opt_pattern.match(line)
+        if not match:
+            continue
+        long_opt = match.group(2)
+        short_opt = match.group(1)
+        opts[long_opt] = Option(long_opt, short_opt)
+
+    return opts
+
+def output_case(out, name, opts):
+    out.write('''\
+_{name}()
+{{
+    local cur prev split=false
+    COMPREPLY=()
+    COMP_WORDBREAKS=${{COMP_WORDBREAKS//=}}
+
+    cmd=${{COMP_WORDS[0]}}
+    _get_comp_words_by_ref cur prev
+'''.format(name=name))
+
+    # Complete option name.
+    out.write('''\
+    case $cur in
+        -*)
+            COMPREPLY=( $( compgen -W '\
+''')
+    for opt in opts.itervalues():
+        out.write(opt.long_opt)
+        out.write(' ')
+
+    out.write('''\
+' -- "$cur" ) )
+            ;;
+''')
+    # If no option found for completion then complete with files.
+    out.write('''\
+        *)
+            _filedir
+            return 0
+    esac
+    return 0
+}}
+complete -F _{name} {name}
+'''.format(name=name))
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print "Generates bash_completion using `/path/to/cmd --help'"
+        print "Usage: make_bash_completion.py /path/to/cmd"
+        exit(1)
+    name = os.path.basename(sys.argv[1])
+    opts = get_all_options(sys.argv[1])
+    output_case(sys.stdout, name, opts)
diff --git a/doc/bash_completion/nghttp b/doc/bash_completion/nghttp
new file mode 100644
index 00000000..009c99c2
--- /dev/null
+++ b/doc/bash_completion/nghttp
@@ -0,0 +1,19 @@
+_nghttp()
+{
+    local cur prev split=false
+    COMPREPLY=()
+    COMP_WORDBREAKS=${COMP_WORDBREAKS//=}
+
+    cmd=${COMP_WORDS[0]}
+    _get_comp_words_by_ref cur prev
+    case $cur in
+        -*)
+            COMPREPLY=( $( compgen -W '--verbose --no-dep --get-assets --har --header-table-size --multiply --padding --dep-idle --continuation --connection-window-bits --peer-max-concurrent-streams --timeout --data --no-content-length --version --color --cert --upgrade --remote-name --weight --help --key --null-out --window-bits --stat --header ' -- "$cur" ) )
+            ;;
+        *)
+            _filedir
+            return 0
+    esac
+    return 0
+}
+complete -F _nghttp nghttp
diff --git a/doc/bash_completion/nghttpd b/doc/bash_completion/nghttpd
new file mode 100644
index 00000000..e42c7ecf
--- /dev/null
+++ b/doc/bash_completion/nghttpd
@@ -0,0 +1,19 @@
+_nghttpd()
+{
+    local cur prev split=false
+    COMPREPLY=()
+    COMP_WORDBREAKS=${COMP_WORDBREAKS//=}
+
+    cmd=${COMP_WORDS[0]}
+    _get_comp_words_by_ref cur prev
+    case $cur in
+        -*)
+            COMPREPLY=( $( compgen -W '--error-gzip --push --header-table-size --htdocs --padding --verbose --version --help --daemon --verify-client --workers --no-tls --color --early-response --dh-param-file ' -- "$cur" ) )
+            ;;
+        *)
+            _filedir
+            return 0
+    esac
+    return 0
+}
+complete -F _nghttpd nghttpd
diff --git a/doc/bash_completion/nghttpx b/doc/bash_completion/nghttpx
new file mode 100644
index 00000000..b2f50089
--- /dev/null
+++ b/doc/bash_completion/nghttpx
@@ -0,0 +1,19 @@
+_nghttpx()
+{
+    local cur prev split=false
+    COMPREPLY=()
+    COMP_WORDBREAKS=${COMP_WORDBREAKS//=}
+
+    cmd=${COMP_WORDS[0]}
+    _get_comp_words_by_ref cur prev
+    case $cur in
+        -*)
+            COMPREPLY=( $( compgen -W '--frontend-http2-connection-window-bits --worker-read-rate --frontend-no-tls --frontend-http2-dump-request-header --daemon --write-rate --altsvc --frontend-http2-dump-response-header --backend-http1-connections-per-frontend --tls-ticket-key-file --ciphers --verify-client-cacert --backend-keep-alive-timeout --strip-incoming-x-forwarded-for --errorlog-file --private-key-passwd-file --version --backlog --backend-http-proxy-uri --add-response-header --backend-write-timeout --backend-request-buffer --add-x-forwarded-for --write-burst --backend-http2-connection-window-bits --insecure --rlimit-nofile --backend-http2-window-bits --tls-proto-list --no-location-rewrite --padding --accesslog-syslog --conf --http2-max-concurrent-streams --client-proxy --worker-frontend-connections --cacert --frontend-read-timeout --worker-write-burst --npn-list --syslog-facility --backend-http1-connections-per-host --no-server-push --client --http2-bridge --no-via --user --stream-write-timeout --backend-response-buffer --http2-no-cookie-crumbling --backend-read-timeout --stream-read-timeout --workers --worker-read-burst --tls-ctx-per-worker --dh-param-file --errorlog-syslog --frontend --accesslog-file --http2-proxy --read-burst --accesslog-format --frontend-http2-window-bits --backend-no-tls --client-private-key-file --pid-file --client-cert-file --no-host-rewrite --log-level --worker-write-rate --help --backend-tls-sni-field --subcert --frontend-frame-debug --frontend-write-timeout --verify-client --read-rate --frontend-http2-read-timeout --backend-ipv4 --listener-disable-timeout --backend-ipv6 --backend ' -- "$cur" ) )
+            ;;
+        *)
+            _filedir
+            return 0
+    esac
+    return 0
+}
+complete -F _nghttpx nghttpx
diff --git a/makebashcompletion b/makebashcompletion
new file mode 100755
index 00000000..9e88d9d4
--- /dev/null
+++ b/makebashcompletion
@@ -0,0 +1,7 @@
+#!/bin/sh -e
+
+BCPATH=doc/bash_completion
+
+for prog in nghttp nghttpd nghttpx h2load; do
+    $BCPATH/make_bash_completion.py src/$prog > $BCPATH/$prog
+done