Explore a BIP39 seed phrase generator with 12–24 words, browser-local generation and checksum checks. Learn how recovery phrases and safe backups work.

To center text in HTML, apply the CSS declaration text-align: center; to the block containing the text. For example, <p style=”text-align: center;”>Hello</p> centers that paragraph’s text horizontally. Use CSS for new work; the old center element is obsolete. The common source of confusion is what you want to move. Centering the words inside a box, […]

To convert HTML to PDF once, open the page in a browser, choose Print and select a PDF destination. For repeated exports, use an HTML rendering tool such as Puppeteer or WeasyPrint. Renaming an .html file to .pdf does not convert its contents. The right method depends on the document. A receipt that is already […]

HTML is usually classified as a markup language, not a general-purpose programming language. It describes a document’s content and meaning. It does not provide the variables, functions and control flow you would use to write a typical program. JavaScript can add that kind of logic to a web page. That short answer needs a qualification. […]

HTML stands for HyperText Markup Language. A browser uses it to make sense of a web document. Which words form the heading? Where does a paragraph finish? Which text is a link? HTML marks those roles. Once you have seen a few lines of source, the long name becomes much easier to remember. Need the […]

HTML stands for HyperText Markup Language. It gives a web page its structure and meaning. Which words are a heading? Where does a paragraph start? What does a link point to? HTML marks out those parts so a browser can put the page together. Wondering “what is HTML?” because you want to make a website? […]

To create an HTML5 audio autoplay loop background player, you need an <audio> element, the loop attribute and a way for users to adjust or stop the sound. Add autoplay to request an automatic start. Some browsers will still prevent audible media from playing automatically. Starting and repeating are separate jobs. HTML can repeat a […]

What a brilliant idea! For the longest time HTML5 specified, and advised developers, that it no longer mattered what the number (1 to 6) was in a heading element (when used in conjunction with sectioning elements). What mattered was the nesting level of the H1-h6 in sectioning elements, just like the X<H>TML promised land, but […]

One of the many new input types that HTML5 introduced is the date input type which, in theory, should allow a developer to provide the user with a simple, usable, recognisable method of entering a date on a web page. But sadly, this input type has yet to reach its full potential. Briefly, the date […]

ARIA is an amazing technology, it allows developers to add meaning to meaningless HTML or override meaning on HTML that is being repurposed and sometimes misused, so that users who rely upon the meaning of HTML, as implemented in browsers, can understand and interact with HTML User Interfaces successfully.