WPThumbs
Themes Plugins By purpose By industry Best-of lists Fix it guides
Free Plugin by Pierre Lannoy v4.7.1

DecaLog

Capture and log events, metrics and traces on your site. Make WordPress observable - finally!

DecaLog

The facts

Rating
4.8★ from 8
Active installs
1k+
Price
Free
Last updated
18 Aug 2026
Added
Aug 2019
Requires WP
6.4
Tested up to
WP 7.1
Requires PHP
8.2
Downloads
52,965

Our analysis

AI-assisted

DecaLog is a WordPress plugin designed for logging and monitoring events, metrics, and traces within your site. It captures data from WordPress core, PHP, database, plugins, and themes, allowing you to track performance and user interactions. You can view this information directly in the WordPress admin dashboard or send it to external services if preferred.

This plugin is suitable for developers and site administrators who need to enhance their site's observability. It offers features for protecting personal information and supports multisite logging. DecaLog is part of a suite of plugins aimed at improving operations performance in WordPress.

Best for: This plugin is best for developers and site administrators seeking to improve site observability and logging.

What it does well

  • Captures events and metrics from WordPress core and plugins
  • Supports user data protection features like pseudonymization
  • Minimal resource impact on server performance
  • Includes extensive WP-CLI commands for operations
  • Part of a suite dedicated to observability

Where it falls short

  • No detailed feature list provided
  • User must ensure compliance with privacy regulations

Verdict

DecaLog offers a comprehensive solution for monitoring and logging in WordPress. It is a useful tool for those looking to enhance their site's performance tracking.

From the developer

Pierre Lannoy's own description of DecaLog, lightly tidied.

Capture and log events, metrics and traces on your site. Make WordPress observable – finally!

De-facto standard stack for WordPress observability, DecaLog provides reliable and powerful logging, monitoring and tracing features for WordPress core, PHP, database, plugins and themes.

DecaLog captures events generated by WordPress core, PHP, database, plugins and themes, collates metrics and KPIs and follows traces of the full WordPress execution. It has the ability to enrich these events, metrics and traces with many details regarding their triggering, before storing them in WordPress database or passing them to external services.

If you don’t want to use external services, DecaLog provides the tools to leverage all the benefits of observability right in the WordPress admin dashboard. It supports multisite logs delegation and contains many features to help to protect personal information (user pseudonymization, IP obfuscation, etc.).

For a full list of supported – internal or third-party – services please, jump to the official supported services list.

DecaLog can be used in dev/debug phases or on production sites: it has nearly no resource impact on the server. It provides an extensive set of WP-CLI commands to help operations too.

DecaLog is part of PerfOps One, a suite of free and open source WordPress plugins dedicated to observability and operations performance.

Developers

If you’re a plugins / themes developer and want to take advantage of the logging features of DecaLog, there’s a DecaLog SDK for you.

Support

This plugin is free and provided without warranty of any kind. Use it at your own risk, I’m not responsible for any improper use of this plugin, nor for any damage it might cause to your site. Always backup all your data before installing a new plugin.

Anyway, I’ll be glad to help you if you encounter issues when using this plugin. Please read carefully the FAQ at the bottom of this page before requesting support.

Privacy

This plugin, as any piece of software, is neither compliant nor non-compliant with privacy laws and regulations. It is your responsibility to use it – by activating the corresponding options or services – with respect for the personal data of your users and applicable laws.

This plugin doesn’t set any cookie in the user’s browser.

This plugin may handle personally identifiable information (PII). If the GDPR or CCPA or similar regulation applies to your case, you must use the anonymization options embedded in the plugin and/or adapt your processes (consent management, security measure, treatment register, etc.).

Read the full description on the official page →

Tagged as

Alternatives

Other plugins for privacy compliance.

CookieYes

Cookie banner, cookie consent and cookie notice plugin for GDPR and CCPA. Auto cookie blocking, Consent Mode v...

Free 1M+ installs 4.8★ (3,228)
Smash Balloon Social Photo Feed

Formerly "Instagram Feed". Display clean, customizable, and responsive Instagram feeds from multiple...

Free 1M+ installs 4.9★ (4,350)
Cookie Compliance for WordPress

Consent management platform for WordPress — GDPR, CCPA & ePrivacy cookie consent, autoblocking, consent re...

Free 900k+ installs 4.8★ (3,025)
Burst Statistics

Simple, lightweight WordPress analytics with privacy-friendly visitor tracking. Cookieless and GDPR-ready. Set...

Free 200k+ installs 4.9★ (183)
Complianz

Configure your own Terms and Conditions specific to your service or webshop.

Free 300k+ installs 4.9★ (184)