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HTML Element Generator

Details creates a native disclosure widget - a collapsible section that toggles open and closed without any JavaScript. Summary is the always-visible label users click to toggle it. Add the open attribute to make it expanded by default. It is keyboard-accessible and exposed corre

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Meter
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Details creates a native disclosure widget - a collapsible section that toggles open and closed without any JavaScript. Summary is the always-visible label users click to toggle it. Add the open attribute to make it expanded by default. It is keyboard-accessible and exposed corre



This free HTML Element Generator from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.



How to use the HTML Element Generator


  1. Paste your input - JSON, regex pattern, JWT, URL etc.
  2. Pick any flags or options the tool supports.
  3. Click the action button (Format, Test, Decode).
  4. Copy the result or download it as a file.



What you can do with the HTML Element Generator


  • Format and validate API responses while debugging.
  • Test regex patterns against real input before deploying.
  • Decode JWTs to inspect claims and expiry.
  • Generate UUIDs for migrations, tests and seeders.



Why use KX Toolkit's HTML Element Generator


    

  • Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
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  • Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
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  • Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
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  • Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
    • 

  • One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.
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Tips for the best results


Bookmark the most-used tools - your browser bookmark bar is faster than retyping the URL every time.



Related Developer Tools


If you find this tool useful, explore the full Developer Tools collection or browse our complete tool directory. KX Toolkit is built for marketers, developers, designers, students and anyone who needs a quick utility without signing up for yet another SaaS.

                

            

        
                    

                

                                            

                            How does the details and summary element work?
                            
Details creates a native disclosure widget - a collapsible section that toggles open and closed without any JavaScript. Summary is the always-visible label users click to toggle it. Add the open attribute to make it expanded by default. It is keyboard-accessible and exposed correctly to screen readers, making it a great drop-in replacement for custom accordion components.

                        

                                            

                            When should I use the dialog element instead of a custom modal?
                            
Dialog ships with focus trapping, the Escape key to close, and a built-in backdrop pseudo-element when opened with showModal(). It also handles inert background content automatically. Use it for confirmations, forms, and any blocking overlay. The older approach of building modals from divs requires manually replicating focus management and accessibility, which is easy to get wrong.

                        

                                            

                            What is the difference between meter and progress?
                            
Progress represents the completion of a task, such as a file upload, with optional value and max attributes. Meter represents a scalar measurement within a known range, like disk usage or a rating, and supports low, high, and optimum thresholds for color cues. Use progress when something is finishing, and meter when displaying a current reading.

                        

                                            

                            How do I make hyperlinks open in a new tab safely?
                            
Add target=_blank along with rel=noopener noreferrer. Noopener prevents the new page from accessing window.opener, which historically allowed reverse tabnabbing attacks. Noreferrer additionally suppresses the Referer header. Modern browsers add noopener implicitly with target=_blank but adding it explicitly stays compatible with older browsers and is good defense-in-depth.

                        

                                            

                            Can I style the details marker arrow?
                            
Yes. Use ::marker on the summary element or use list-style on summary in modern browsers. To replace the default triangle entirely, set list-style: none and add your own indicator with a pseudo-element that rotates based on the open attribute. Cross-browser support has improved a lot, but test in Safari since it lagged on these features.

                        

                                            

                            Are these elements accessible by default?
                            
Mostly yes - details, dialog, meter, and progress have built-in ARIA semantics. The browser maps them to accessible roles automatically, so screen readers announce them correctly without extra attributes. The biggest accessibility risk is using showModal versus show on dialog: showModal traps focus and treats the rest of the page as inert, while show does not, which can confuse keyboard users.

                        

                                    

            

        
                                


                
                                    

                        
                        
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