Web & Dev Tools
Developer and web utilities for everyday tasks. Decode JWTs, test regex, generate meta tags, minify code, parse user agents, and more.
JWT Decoder
Paste a JSON Web Token to decode and inspect its header, payload, and expiry — entirely in your browser.
Regex Tester
Test regular expressions against a string with live match highlighting, flag toggles, and a match details table.
Meta Tag Generator
Generate SEO and social meta tags — standard, Open Graph, and Twitter/X Card — and copy the ready-to-paste HTML.
Open Graph Preview
Preview how your page will look when shared on Facebook, LinkedIn, and Twitter/X. No URL fetch needed.
Robots.txt Generator
Build a robots.txt file visually. Add user-agent rules, Allow/Disallow paths, crawl-delay, and sitemap URL.
Sitemap.xml Generator
Create a valid XML sitemap by adding URLs with lastmod, changefreq, and priority. Download or copy the output.
HTML Minifier
Minify HTML by removing comments and collapsing whitespace. Shows exact bytes saved and compression percentage.
CSS Minifier
Minify CSS by stripping comments and collapsing whitespace. Shows bytes saved and compression percentage.
JS Minifier
Minify JavaScript by removing comments and collapsing whitespace. Shows bytes saved and compression ratio.
User Agent Parser
Parse any User-Agent string to extract browser, engine, OS, and device type. Pre-fills with your own browser's UA.