mod_pagespeed 1.15 Documentation

Everything you need to install, configure, and run mod_pagespeed 1.15 on nginx, Apache, IIS, and Envoy.

Starting a new deployment? ModPageSpeed 2.0 is the current flagship — a Docker reverse proxy in front of any origin, or ASP.NET Core middleware. Stay on 1.15 to keep an in-process module for Apache, nginx, IIS, or Envoy.

Getting Started

Install mod_pagespeed 1.15 on nginx, Apache, IIS, or Envoy. Platform-specific setup instructions, verification steps, license activation, and next steps.

Upgrading from Open-Source

Step-by-step guide to replacing Google's open-source mod_pagespeed with the maintained 1.15 release. Drop-in compatible — keep your existing config.

Downloads & Licensing

Download mod_pagespeed 1.15 packages for nginx, Apache, and IIS. Pre-built .deb, .rpm, and .msi binaries. Install and run to evaluate; a commercial license is required for production use.

What's New in 1.15

Everything that changed since Google's final 2020 release of mod_pagespeed. Security patches, Cyclone Cache, multi-platform support, and more.

ASP.NET Core

ASP.NET Core Sidecar (NuGet)

Add mod_pagespeed 1.15 to an ASP.NET Core app with two lines of middleware. WeAmp.PageSpeed.Sidecar runs a bundled nginx + ngx_pagespeed optimizer on loopback behind your app. Linux-only (linux-x64, linux-arm64), with AddPageSpeed()/UsePageSpeed() wiring and a full options reference.

Configuration

Configure mod_pagespeed 1.15 for nginx, Apache, IIS, and Envoy. Module states, configuration directives, virtual hosts, and reverse proxy setup.

Filter Selection

Choose which mod_pagespeed 1.15 filters to enable. RewriteLevel presets, CoreFilters defaults, EnableFilters, DisableFilters, and tuning thresholds.

Domain Configuration

Authorize and map domains in mod_pagespeed 1.1. Domain authorization, MapOriginDomain, MapRewriteDomain, ShardDomain for nginx, Apache, IIS, and Envoy.

HTTPS Configuration

Configure HTTPS resource fetching in mod_pagespeed 1.1. FetchHttps with SSL certificates, MapOriginDomain to HTTP backend, and LoadFromFile.

Caching: Cyclone, Memcached, Redis

Configure caching in mod_pagespeed 1.15. Cyclone Cache (default), Memcached and Redis integration, shared memory metadata, cache purging, and IPRO.

Filters

Filters Overview

All mod_pagespeed 1.15 optimization filters organized by category. Image, CSS, JavaScript, HTML, and caching filters with quick descriptions.

Image Filters

Configure image optimization in mod_pagespeed 1.15. Recompression, format conversion, resizing, WebP transcoding, lazy loading, and responsive images.

CSS Filters

Configure CSS optimization filters in mod_pagespeed 1.15. Minification, combining, inlining, critical CSS extraction, and CSS restructuring.

JavaScript Filters

Configure JavaScript optimization in mod_pagespeed 1.15. Minification, combining, inlining, deferring execution, and source map preservation.

HTML Filters

Configure HTML optimization filters in mod_pagespeed 1.15. Whitespace removal, comment stripping, attribute elision, DNS prefetch, and resource preloading.

Caching & URL Filters

Configure cache extension and URL management filters in mod_pagespeed 1.15. Cache-extended URLs, domain rewriting, and resource instrumentation.

Operations

Admin Console

mod_pagespeed 1.15 admin console: statistics, cache inspection, message history, and config. Setup for nginx, Apache, IIS — accessible at /pagespeed_admin/.

Security

Security considerations for mod_pagespeed 1.15. Admin page access control, untrusted content, XSS prevention, cache poisoning, and domain authorization.

Troubleshooting

Diagnose and fix common mod_pagespeed 1.15 issues. Missing response headers, broken pages, 404 errors on optimized resources, cache problems, and debugging.

IIS

IIS Tuning

Optimize IIS performance alongside mod_pagespeed 1.15. Static vs dynamic gzip, MIME types, CDN integration, Application Request Routing, and TCP slow start.

IIS Configuration

The pagespeed.config file format for mod_pagespeed 1.15 on IIS. Directive syntax, path-based regex matching, server and site-level config, environment variables.

Reference

Filter Reference

Complete reference table of all 62 mod_pagespeed 1.15 filters. Names, categories, CoreFilter status, safety ratings, and descriptions at a glance.

Directive Index

Alphabetical reference of all mod_pagespeed 1.15 configuration directives with Apache and nginx syntax, default values, and links to full documentation.

Frequently Asked Questions

Frequently asked questions about mod_pagespeed 1.15. Installation, configuration, licensing, caching, troubleshooting, and 1.15 vs 2.0 comparison.

cPanel / EasyApache 4

Install, uninstall, and maintain mod_pagespeed 1.15 on cPanel / EasyApache 4 — signed EA4 RPMs, the WHM Customize checkbox, the cpanel/elevate OS-upgrade runbook, and how the Apache Module Magic Number affects ea-apache24 updates.