Devtoolry: JSON Formatter, SEO Checker & Dev Tools

Format JSON, check any site's robots.txt, SEO and indexability, and open 150+ free developer tools and compilers in one click.

Devtoolry opens free developer and SEO tools for the page you are on. Everything runs on devtoolry.com, with no sign-up. CHECK THE CURRENT SITE Click the toolbar icon on any web page and choose a check: • Robots.txt: validates the site's robots.txt the way Google reads it and shows which search and AI crawlers may visit. • SEO check: reviews the page's title, description, headings, canonical and robots tags. • Googlebot view: compares what Google's crawler receives with what visitors see. • AI crawlers: shows which AI bots the site allows. The same checks are in the right-click menu. WORK WITH JSON Select JSON on any page and right-click to format, validate or view it as a tree, or paste JSON into the popup. FIND A TOOL Search the whole tool collection from the popup, or type "dt" and a space in the address bar. PRIVACY No account and no tracking in the extension. Selected text reaches the tool in the part of the address after #, which browsers never send to a server. For SEO checks, the page address is sent to devtoolry.com only when you click a check.