How to enable Gzip compression

Website Gzip compression makes it possible to reduce the size of web pages and any other typical web files to about 30% or less of its original size before it gets sent to the visitor. This compressed file is then served to the browser of the visitor which decompresses it automatically whereafter the full file gets served to the visitor again. Enabling Gzip compression is great for improving page speed because the browser of your visitor will need to download much smaller web files as the original ones when browsing your web pages. There’s no reason to not use it these days, every knowledgable website owner should use it for his/her website(s).

To enable mod_deflate(recommended):

IndexIgnore /
RewriteEngine on

#GZIP
<IfModule mod_deflate.c>
  # Insert filters / compress text, html, javascript, css, xml:
  AddOutputFilterByType DEFLATE text/plain
  AddOutputFilterByType DEFLATE text/html
  AddOutputFilterByType DEFLATE text/xml
  AddOutputFilterByType DEFLATE text/css
  AddOutputFilterByType DEFLATE text/vtt 
  AddOutputFilterByType DEFLATE text/x-component
  AddOutputFilterByType DEFLATE application/xml
  AddOutputFilterByType DEFLATE application/xhtml+xml
  AddOutputFilterByType DEFLATE application/rss+xml
  AddOutputFilterByType DEFLATE application/js
  AddOutputFilterByType DEFLATE application/javascript
  AddOutputFilterByType DEFLATE application/x-javascript
  AddOutputFilterByType DEFLATE application/x-httpd-php
  AddOutputFilterByType DEFLATE application/x-httpd-fastphp
  AddOutputFilterByType DEFLATE application/atom+xml 
  AddOutputFilterByType DEFLATE application/json
  AddOutputFilterByType DEFLATE application/ld+json 
  AddOutputFilterByType DEFLATE application/vnd.ms-fontobject 
  AddOutputFilterByType DEFLATE application/x-font-ttf 
  AddOutputFilterByType DEFLATE application/x-web-app-manifest+json 
  AddOutputFilterByType DEFLATE font/opentype 
  AddOutputFilterByType DEFLATE image/svg+xml
  AddOutputFilterByType DEFLATE image/x-icon 

  # Exception: Images
  SetEnvIfNoCase REQUEST_URI \.(?:gif|jpg|jpeg|png|svg)$ no-gzip dont-vary

  # Drop problematic browsers
  BrowserMatch ^Mozilla/4 gzip-only-text/html
  BrowserMatch ^Mozilla/4\.0[678] no-gzip
  BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html

  # Make sure proxies donot deliver the wrong content 
  Header append Vary User-Agent env=!dont-vary
</IfModule>

<IfModule mod_expires.c>
ExpiresActive On
ExpiresDefault "access plus 1 week"
ExpiresByType image/jpg "access plus 1 year"
ExpiresByType image/jpeg "access plus 1 year"
ExpiresByType image/gif "access plus 1 year"
ExpiresByType image/png "access plus 1 year"
ExpiresByType image/svg+xml "access plus 1 month" 
ExpiresByType text/css "access plus 1 month"
ExpiresByType text/html "access plus 1 minute"
ExpiresByType text/plain "access plus 1 month"
ExpiresByType text/x-component "access plus 1 month" 
ExpiresByType text/javascript "access plus 1 month"
ExpiresByType text/x-javascript "access plus 1 month"
ExpiresByType application/pdf "access plus 1 month"
ExpiresByType application/javascript "access plus 1 months"
ExpiresByType application/x-javascript "access plus 1 months"
ExpiresByType application/x-shockwave-flash "access plus 1 month"
ExpiresByType image/x-icon "access plus 1 year"
ExpiresByType application/json "access plus 1 month"
ExpiresByType application/ld+json "access plus 1 month"
ExpiresByType application/xml "access plus 1 month"
ExpiresByType text/xml "access plus 0 seconds" 
ExpiresByType application/x-web-app-manifest+json "access plus 1 month" 
ExpiresByType text/cache-manifest "access plus 0 seconds" 
ExpiresByType audio/ogg "access plus 1 month" 
ExpiresByType video/mp4 "access plus 1 month" 
ExpiresByType video/ogg "access plus 1 month" 
ExpiresByType video/webm "access plus 1 month" 
ExpiresByType application/atom+xml "access plus 1 hour" 
ExpiresByType application/rss+xml "access plus 1 hour" 
ExpiresByType application/font-woff "access plus 1 month" 
ExpiresByType application/vnd.ms-fontobject "access plus 1 month" 
ExpiresByType application/x-font-ttf "access plus 1 month" 
ExpiresByType font/opentype "access plus 1 month" 
</IfModule>

<IfModule mod_headers.c>
<FilesMatch "\.(ico|pdf|flv|swf|js|css|gif|png|jpg|jpeg|txt|html|htm)$">
Header set Cache-Control "max-age=2592000, public"
</FilesMatch>
</IfModule>

<IfModule mod_headers.c>
  <FilesMatch "\.(js|css|xml|gz)$">
    Header append Vary Accept-Encoding
  </FilesMatch>
</IfModule>


<IfModule mod_gzip.c>
  mod_gzip_on Yes
  mod_gzip_dechunk Yes
  mod_gzip_item_include file \.(html?|txt|css|js|php|pl|json)$
  mod_gzip_item_include handler ^cgi-script$
  mod_gzip_item_include mime ^text/.*
  mod_gzip_item_include mime ^application/x-javascript.*
  mod_gzip_item_exclude mime ^image/.*
  mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
</IfModule>

# Set Keep Alive Header
<IfModule mod_headers.c>
    Header set Connection keep-alive
</IfModule>

# If your server donot support ETags deactivate with "None" (and remove header)
<IfModule mod_expires.c> 
  <IfModule mod_headers.c> 
    Header unset ETag 
  </IfModule> 
  FileETag None 
</IfModule>
#END GZIP

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