Smush – Image Optimization, Compression, Lazy Load, WebP & CDN vs Crawler Record

Crawler Record shows when Google, ChatGPT, Claude, and other top bots last visited pages on your website, so you can be confident your pages are being crawled. This is the first step in ensuring these platforms index your website so they can serve it to visitors. The data covers several top user-agents, including: Google Bing ChatGPT (OpenAI) Claude (Anthropic) Perplexity Meta Apple Amazon DuckDuckGo Common Crawl Administrators with manage_options can view this information: Admin page: a grouped list of all crawlers, with last seen time, last page, and robots.txt status for the crawler. Recent Pages: From the admin page, you can select a crawler and see its latest visited pages, the response status WordPress observed, and a destination when WordPress exposes one for a retained 3xx response. Crawler Activity Overview: Review 28-day visit totals, response-code health, crawler mix, a daily activity timeline, and crawler staleness. URL reports use up to the 50 most recent recorded visits per crawler. Crawler Status Overview: Filter the main dashboard and crawler table by crawlers that visited within 28 days, have become stale, or have never visited. The unfiltered dashboard includes the stale-crawler age distribution alongside current activity; the Stale view focuses on that distribution, latest-visit details, and Recent Pages links instead of empty or potentially misleading historical metrics. Header Codes for User-Agents: Did a user-agent successfully visit a page (2xx), receive a 3xx response, or land on a page that was missing or inaccessible (4xx)? Crawler Record will show you. The 3xx report includes every retained 3xx status, including 304 Not Modified; only responses with an observable redirect destination show where the request was sent. Admin Bar (front-end): quick-glance status for all user-agent visits. Per Page/Post: From the edit screen on any page or post, you can see the last time each crawler visited that page. Administrators can also open the main dashboard or an individual crawler’s Recent Pages report from this box. Robots-aware: The plugin checks your robots.txt and evaluates Allow/Disallow rules for a given path. WordPress’s “Discourage search engines” preference is reported separately because it asks compliant search engines to avoid indexing. Response-aware: Recent visits include the final HTTP status WordPress can observe, including ordinary WordPress 404 pages and 3xx responses that occur after tracking begins. The 3xx report groups all retained 3xx statuses together; 304 Not Modified does not redirect and therefore has no destination. Other 3xx rows show a destination only when WordPress/PHP exposes one. Responses served by a CDN, web server, static cache, or security layer before WordPress runs cannot be recorded. Identification note: Crawler identification is based on the supplied user-agent string. User-agent strings can be spoofed, and this plugin does not verify IPs. Learn how to use this plugin. Highlights Supports common user-agent variants for Google, Bing, OpenAI (ChatGPT), Anthropic (Claude), Perplexity, Meta, Apple, Amazon, DuckDuckGo, and Common Crawl. robots.txt status computed from a local physical or WordPress virtual source without outbound requests. Known limitations Can only track crawlers from the time the plugin is installed—it cannot reconstruct earlier visits. Per-post “last seen” timestamp and user-agent metadata update at most once every 10 minutes by default. Separately, rapid same-crawler, same-URL, same-status visits are suppressed for 30 seconds, and a high emergency ceiling retains up to 50 visits per crawler per minute. Concurrent requests matching the same crawler are not coordinated. One database write may replace another, causing a visit to be absent from recent history or daily totals, or causing the latest-visit fields to reflect whichever write finished last. Dashboard totals are therefore approximate retained activity rather than an exact raw access log because of throttling, retention limits, and possible concurrent writes. Response codes are available only for requests that reach WordPress. Responses served earlier by a CDN, web server, static cache, or security layer are outside the plugin’s visibility. The 3xx report includes all retained 3xx statuses, including 304 Not Modified. Redirect destinations are available only when WordPress/PHP exposes a Location header. Redirects issued before WordPress runs cannot be recorded, and a followed destination is retained as a separate visit if it reaches WordPress. Stored source and redirect URLs include scheme, validated host, optional port, and path. Query strings are omitted to avoid retaining sensitive tokens, personal data, and high-cardinality tracking parameters. Reverse-proxy configuration can affect the scheme WordPress observes. URLs up to 114 characters are stored normally. URLs from 115 through 1,028 characters retain the visit with a 100-character prefix and an excessive-length marker; they are displayed with an ellipsis and are not linked. URLs longer than 1,028 characters are omitted from URL-level reports. Sitewide tracking for such requests is subject to the 30-second suppression window, while applicable per-post metadata uses its separate 10-minute throttle. Privacy This plugin stores: – Timestamps of crawler visits (float, with microseconds) – Exact matched crawler user-agent strings, bounded to 512 characters – Last URL and a bounded 50-visit recent history per crawler – Final HTTP response status observable by WordPress for recent crawler visits – Observable redirect destination, when PHP exposes one for a retained 3xx response other than 304 Not Modified – Last post ID per crawler (for admin performance) Stored source and redirect URLs omit query strings. Incoming hosts are validated and used only for reporting; they are never used for redirects, filesystem access, or outbound requests. Existing URL length limits apply independently to redirect sources and destinations. The plugin stores requests matching configured crawler patterns, but user-agent strings can be spoofed. It performs no IP verification and transmits no data to third parties. Crawler reports, the front-end admin-bar menu, and the post/page meta box require manage_options. Source URLs with hosts outside the configured WordPress home/site hosts are displayed as non-clickable diagnostic text. Uninstall removes all current and legacy Crawler Record options, transients, and post metadata from each site in a multisite network; WordPress removes the plugin files themselves. License GPLv2 or later. See LICENSE file.

Compress images, optimize images, and enable image lazy load automatically with the powerful Smush image optimizer to keep your WordPress site fast, without losing quality. Smush makes it easy to optimize images, compress images, and deliver images faster across your entire WordPress site. This all-in-one image optimizer automatically reduces image file sizes, enables image lazy load, and serves modern formats like WebP and AVIF, all without breaking image quality or adding extra work. Whether you’re running a blog, store, or portfolio, Smush helps you optimize images at scale and keep your site fast with a trusted WordPress image optimizer. Trusted by 1+ Million Sites | 4.8/5 Star Rating Get everything you need to optimize images and speed up your site. Smush works out of the box with no complicated setup – just install and let it handle the rest. Compress images without losing quality Reduce image file size automatically while keeping your images sharp and clear. Smush is an easy-to-use image optimizer which let’s you compress images using both lossless and lossy compression, giving you the best balance of quality and performance without extra work. You can also compress images outside the media library using Directory Smush, making it easy to optimize images stored in theme folders, plugins, or other directories on your server. Lazy load images for faster pages Enable image lazy load across your site so images load only when needed. This image optimizer improves initial page speed and creates a smoother experience for visitors without extra configuration. Serve WebP and AVIF images automatically (PRO) Convert images to WebP and AVIF and serve them automatically to supported browsers. Smush helps you optimize images using next-gen formats to reduce file size and improve load times across your WordPress site. Deliver images faster with an Image CDN (PRO) Serve images through a global image CDN to reduce latency and improve load times for visitors around the world. 119 global CDN servers Up to 500 GB of bandwidth Faster image delivery based on visitor location Improved performance for image-heavy and high-traffic sites Automatically resize and fix image dimensions (PRO) Eliminate common PageSpeed warnings and improve layout stability with automatic image sizing. Smush dynamically resizes images to perfectly fit their containers, regardless of original size, helping fix the “Properly size images” warning in Google PageSpeed Insights. It also automatically adds missing width and height attributes to your images, improving rendering speed and reducing layout shifts. This helps you meet the “Ensure images have explicit width and height” recommendation without any manual work. Optimize your entire site, automatically Smush works across your whole site as a powerful image optimizer to optimize images as you upload them and maintain performance over time without manual work. Optimize images automatically on upload Compress images in bulk or individually Works with your existing media library No need to re-upload images Enable image lazy load across your site Convert images to WebP and AVIF Deliver images with an integrated image CDN Automatically resize and serve correctly sized images Optimize images outside the media library with Directory Smush Built for performance Smush improves page speed and overall performance by reducing image weight and improving how images are delivered. Reduce page load times Improve user experience Better performance for image-heavy pages Supports image lazy load and preload images (PRO) for faster perceived performance Works with your existing setup Smush is built to work with your current WordPress setup, including popular themes, page builders, and plugins. Compatible with Gutenberg, Elementor, WPBakery, and more Works with WooCommerce stores No need to change your workflow Easy to enable and configure Designed to be simple You don’t need to be a performance expert to optimize images with Smush image optimizer. Works out of the box Simple settings when you need them No technical knowledge required Safe to use on any site Why choose Smush? There are plenty of image optimization plugins, but Smush focuses on making it easy to optimize images, compress images, and improve performance without complexity. As a leading WordPress image optimizer, Smush gives you powerful optimization tools without the technical hassle. Trusted by over 1 million WordPress users Built specifically for WordPress Regular updates and improvements Backed by the WPMU DEV team Get started in minutes Install Smush, activate it, and start to compress images, optimize images, and enable image lazy load right away. This easy-to-use image optimizer helps most sites see improvements immediately without changing how they upload or manage images. About Us WPMU DEV is a premium supplier of quality WordPress plugins, services and support. Learn more here: https://wpmudev.com/ Don’t forget to stay up to date on everything WordPress from the Internet’s number one resource: WPMU DEV Blog Hey, one more thing… we hope you enjoy our free offerings as much as we’ve loved making them for you! Contact and Credits Originally written by Alex Dunae at Dialect (dialect.ca, e-mail ‘alex’ at ‘dialect dot ca’), 2008-11.