# ThemeSniffer - LLMs.txt # AI-friendly content summary for language models ## Brand ThemeSniffer (themesniffer.com). Also referred to as "WordPress Theme and Plugins Detector", "Theme Sniffer" and "WP Theme Detector" - all the same product. ## About ThemeSniffer is a free Chrome browser extension plus a set of free web tools that instantly identify WordPress themes and plugins on any website. ## Primary Purpose Help web developers, designers, marketers, and WordPress enthusiasts discover what themes and plugins power any WordPress website. ## Key Features - Instant WordPress theme detection with name, version, and author info - Plugin discovery with version information and download counts - SEO information extraction - Export functionality for detected data - Works on Chrome and Chromium-based browsers (Edge, Brave, Opera) - No account required - Privacy-focused: all detection runs locally in browser ## Target Audience - WordPress developers researching themes and plugins - Web designers seeking design inspiration - Digital marketers analyzing competitor websites - Business owners exploring WordPress solutions - Freelancers and agencies doing client research ## Pricing Currently free with all features included. No premium tier at this time. ## Installation Available on Chrome Web Store: https://chromewebstore.google.com/detail/wordpress-theme-detector/jmfelpjpndlbhbpffecppfhnfjkamiaa ## Free Web Tools (no install required) - WordPress Site Tech Stack Report: https://themesniffer.com/tools/wordpress-tech-stack/ Enter any URL to detect the theme, active plugins, hosting provider, CDN, and speed metrics. Free overview; the full itemised report and PDF download unlock with an email. - WordPress Font Detector: https://themesniffer.com/tools/wordpress-font-detector/ Enter any URL to see every font the site uses: families with weights and styles, Google Fonts, Bunny Fonts, Fontshare, Adobe Fonts kits, self-hosted @font-face files, system stacks, WordPress theme.json font presets, and the CSS type scale. Completely free, no email, with live previews and PDF export. Works on non-WordPress sites too. - Website Color Palette Extractor: https://themesniffer.com/tools/wordpress-color-palette/ Enter any URL to pull its palette straight out of the CSS: every color with hex, rgb and hsl, which color is the background, text and brand, the WordPress theme.json colors, gradients, and a WCAG contrast check. Export to CSS, SCSS, Tailwind or JSON. Works on non-WordPress sites too. - Is It WordPress? Checker: https://themesniffer.com/tools/is-it-wordpress/ Confirm whether any website runs WordPress by checking eight independent signals. - All tools: https://themesniffer.com/tools/ ## For Developers and Agents Developer portal: https://themesniffer.com/developers OpenAPI 3.1 spec: https://themesniffer.com/openapi.json Public HTTP JSON API. No API key, no account. GET requests, one `url` query parameter, JSON responses, open CORS. Rate limited per IP per minute (8-10 requests depending on endpoint). Send a descriptive User-Agent of at least 10 characters. - https://themesniffer.com/api/check-wordpress?url=example.com - WordPress verdict, confidence, 8 signals, theme - https://themesniffer.com/api/tech-stack?url=example.com - theme, plugins, hosting, CDN, server, security headers, speed - https://themesniffer.com/api/font-detector?url=example.com - font families, providers, presets, type scale - https://themesniffer.com/api/color-palette?url=example.com - palette, color roles, theme.json colors, gradients, contrast MCP server (Model Context Protocol, Streamable HTTP, JSON-RPC 2.0): - POST https://themesniffer.com/api/mcp - Tools: check_if_wordpress, get_wordpress_tech_stack, detect_website_fonts, extract_color_palette - Each tool declares an MCP Apps ui:// resource, so hosts that support the extension render an interactive view instead of raw JSON. WebMCP: every tool page registers the same four tools via document.modelContext.registerTool(), so a browser agent on the page can call them instead of filling in the form. Limits worth knowing: detection reads the public front end only, so plugins that ship no CSS or JS are invisible; speed numbers are a lab snapshot from our edge, not field Core Web Vitals; private, local and reserved addresses are refused. ## Markdown Versions (for AI agents) Every page on this site has a Markdown twin at the same path with a .md extension. It is the same content with the navigation, styling, and scripts removed — roughly 73% fewer bytes than the HTML. Each page also advertises its twin via in the document head. - https://themesniffer.com/about.md - https://themesniffer.com/blog/fastest-wordpress-themes.md - https://themesniffer.com/blog/how-to-check-wordpress-tech-stack.md - https://themesniffer.com/blog/how-to-find-wordpress-plugins.md - https://themesniffer.com/blog/how-to-find-wordpress-theme.md - https://themesniffer.com/blog/index.md - https://themesniffer.com/blog/most-popular-wordpress-themes.md - https://themesniffer.com/blog/reverse-engineer-wordpress-design.md - https://themesniffer.com/blog/wordpress-competitive-analysis.md - https://themesniffer.com/blog/wordpress-themes-famous-brands-use.md - https://themesniffer.com/contact.md - https://themesniffer.com/developers.md - https://themesniffer.com/index.md - https://themesniffer.com/privacy.md - https://themesniffer.com/terms.md - https://themesniffer.com/tools/index.md - https://themesniffer.com/tools/is-it-wordpress/index.md - https://themesniffer.com/tools/wordpress-color-palette/index.md - https://themesniffer.com/tools/wordpress-font-detector/index.md - https://themesniffer.com/tools/wordpress-tech-stack/index.md ## How It Works 1. Install the Chrome extension 2. Visit any WordPress website 3. Click the extension icon 4. View detected theme and plugins instantly ## Author Ruslan Saifullin - Software Engineer with 10+ years of WordPress experience Built 20+ WordPress projects Twitter/X: https://x.com/ruslan_dev_ai ## Contact Twitter/X: https://x.com/ruslan_dev_ai Website: https://themesniffer.com ## Technical Details - Extension analyzes page source code for WordPress signatures - Detects themes via stylesheet references and meta information - Identifies plugins through script tags, CSS files, and HTML markers - Results displayed in clean popup interface - Data can be exported for reference ## Content Policies - No user data collection - No tracking or analytics on browsing behavior - Chrome extension: detection happens entirely client-side, with no external API calls - Web tools and API: our server fetches the page you name and analyzes it; nothing about your own browsing is collected. See https://themesniffer.com/privacy ## Last Updated 2026-09-08