diff --git a/bin/compress-pdf b/bin/compress-pdf
new file mode 100755
index 0000000..bd194b4
--- /dev/null
+++ b/bin/compress-pdf
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+if [ $# -ne 2 ]; then
+    echo >&2 "errror: wrong number of arguments"
+    echo >&2 "usage: compress-pdf <input> <output>"
+    exit 1
+fi
+
+gs -sDEVICE=pdfwrite -dPDFSETTINGS=/printer -dCompatibilityLevel=1.4 -dNOPAUSE -dQUIET -dBATCH -sOutputFile=$2 $1
diff --git a/init.vim b/init.vim
index 0fdb498..e0de819 100644
--- a/init.vim
+++ b/init.vim
@@ -159,6 +159,9 @@ nmap <silent> gy <Plug>(coc-type-definition)
 nmap <silent> gi <Plug>(coc-implementation)
 nmap <silent> gr <Plug>(coc-references)
 
+" Add `:Format` command to format current buffer.
+command! -nargs=0 Format :call CocAction('format')
+
 " Use K to show documentation in preview window.
 nnoremap <silent> K :call <SID>show_documentation()<CR>