Web Utilities
UA parser, QR codes, meta tags, sitemaps.
6 tools · all run in your browser
Browser-based tools for the everyday web work that does not quite fit a bigger category: generate a QR code from any URL or text (downloads as SVG or PNG, no sign-up); parse a user-agent string to see what browser, OS, engine, and device a UA reports; check the Open Graph and Twitter Card tags any page is serving; build a robots.txt or generate a basic XML sitemap; inspect CSS viewport units or test a URL against a regex pattern.
The QR Code Generator is probably the most used tool in this group — it produces a high-resolution SVG that scales cleanly to any print size, unlike raster PNGs from many other generators. Paste a URL, download the SVG, place it in a PDF or print layout at whatever size you need.
The User Agent Parser is useful for debugging browser compatibility issues, auditing your analytics segments, and understanding what automated scrapers report as their UA. Paste any UA string (from a request log, a support ticket, or your own browser) and get a structured breakdown: browser family, version, OS, device type, rendering engine.
All web utilities
- Meta Tag GeneratorGenerate SEO, Open Graph, and Twitter Card meta tags from your title, description, URL, and image. Includes a live Google SERP preview.
- QR Code GeneratorGenerate QR codes for URLs, text, WiFi credentials, and more. Customize colors and error correction. Download as PNG or SVG. Runs in your browser.
- robots.txt TesterPaste your robots.txt and any URL to see whether Googlebot, Bingbot, GPTBot, or any user-agent is allowed to crawl it. Implements the Google longest-match rule.
- URL ParserBreak any URL into its protocol, host, port, path, query parameters, and hash. Uses the browser's native URL parser for spec accuracy.
- User-Agent ParserParse any User-Agent string to identify the browser, engine, OS, and device. Auto-detects your own UA. Runs entirely in your browser.
- UTM URL BuilderBuild UTM-tagged campaign URLs for Google Analytics, Adobe Analytics, and other tools. Presets for newsletter, social, and paid search. Validates required params.
Frequently asked
Paste any URL or text into our QR Code Generator and click Generate. Download as SVG for print (infinitely scalable) or PNG for digital use. No sign-up, no watermark, no expiry — the code is self-contained data, not a redirect link.
A header that browsers send with every HTTP request identifying the browser, version, OS, and device. Example: "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0 Safari/537.36". Our UA Parser breaks it into human-readable fields.
Meta tags in the <head> of a page that control how it appears when shared on social media — the title, description, image, and URL shown in link previews on Facebook, LinkedIn, Slack, iMessage, and others. Our OG Tag Checker fetches any URL and shows you exactly what tags it has (or is missing).
At minimum: a User-agent: * block that allows or disallows crawlers, and a Sitemap: line pointing to your XML sitemap URL. Block URL patterns that generate duplicate content (like filter and sort query parameters). Our Robots.txt Generator builds a valid file with common presets.
An XML sitemap is a file that lists every URL on your site so search engines can find them, especially pages not linked from anywhere else. Most sites under 500 pages do not strictly need one if they have good internal linking — but it speeds up indexing and gives you a place to declare canonical URLs and last-modified dates.