LH Zero Spam


Why should your users prove that they’re humans by filling out captchas? Let bots prove they’re not bots with the LH Zero Spam plugin.

LH Zero Spam blocks registration spam and spam in comments automatically without any config or setup. Zero Spam was initially built based on the work by David Walsh, but enhanced with simpler code base and unobtrusive JavaScript.

Major features in LH Zero Spam include:

  • No captcha, because spam is not users‘ problem
  • No moderation queues, because spam is not administrators‘ problem
  • Blocks spam registrations & comments with the use of JavaScript


  1. Upload the lh-zero-spam folder to the /wp-content/plugins/ directory
  2. Activate the plugin through the ‚Plugins‘ menu in WordPress


Is JavaScript required for this plugin to work?

Yes, that’s what does the magic and keeps spam bots out.

I keep getting ‚There was a problem processing your comment.‘

Be sure JavaScript is enabled and there are no JS errors.

Does this work with multisite?‘

Yes it protectas from spam wp-register registrations.

Does this work with Buddypress?‘

Yes as of version 1.08 this will protect from Buddypress registrations. Note is requires the bp_before_account_details_fields hook, must reputable themse include this hook.


17. September 2016
I was using Akismet but Akismet failed to stop spam, I was getting a lot of spam comments on daily basis. Few month ago, I installed this free plugin and there isn't any spam comment since then. This one is a must have plugin for bloggers.
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Mitwirkende & Entwickler

„LH Zero Spam“ ist Open-Source-Software. Folgende Menschen haben an diesem Plugin mitgewirkt:


Übersetze „LH Zero Spam“ in deine Sprache.

Interessiert an der Entwicklung?

Durchstöbere den Code, sieh dir das SVN Repository an oder abonniere das Entwicklungsprotokoll per RSS.



  • Initial release


  • Code Improvement


  • Better documentation

**1.03 January 28, 2017*
Rest api support.

**1.04 January 30, 2017*
xmlrpc support.

**1.05 July 25, 2017*
class check.

**1.06 September 20, 2017*
Comment_form backup

**1.07 September 20, 2017*
Added minimum version of php

**1.08 September 24, 2017*
Added buddypress support

**1.09 December 17, 2017*
filemtime for load_file

**1.10 May 17, 2019*
anonymous function for javascript nonce handling