Bold Fusion Digital
A short tour of the tool. If you already know why you'd want a markdown-to-social formatter, this gets you running in under five minutes.
The tool has two sides.
The left side is where you write. It's a markdown editor — you type your post and use the toolbar buttons at the top of the editor for bold, italic, lists, quotes, links, and headings. The text you see on the left is your source — one piece of writing you'll use everywhere.
The right side is what each social platform will actually display. As you type or edit on the left, every panel on the right updates live. You don't hit a "convert" button; it's always converting.
When you're ready to post, click the Copy button at the top of the panel for whichever platform you're posting to. Paste it into that platform's post box. Done.
That's the whole tool.
You don't have to know markdown syntax to use this. The toolbar above the editor handles it for you, the same way Word or Google Docs handles formatting:
If you're comfortable with markdown, you can also type the syntax directly (**bold**, *italic*, # Title, ## Section, - bullet, > quote, [link](url)). The toolbar buttons and the syntax do the same thing.
Social platforms don't actually support bold or italic — none of them. So how do you get bold text on LinkedIn?
The trick is to swap regular letters for Unicode characters that look bold (𝗯𝗼𝗹𝗱). They're not real bold; they're a different set of characters that happen to look that way. Every panel has a "Unicode" toggle at the top to turn this on or off.
LinkedIn: on by default. People expect to see bold on LinkedIn, and most don't know how to do it manually. This is the single biggest reason to use the tool.
Instagram, Facebook, X/Twitter: off by default. The Unicode trick reads as spammy on those platforms (especially X) and can hurt accessibility — screen readers may skip or mangle those characters. Use sparingly there.
You can toggle each panel independently. If a specific post benefits from bold on Facebook, turn it on for that post.
Each panel shows a character count next to the platform name. It turns amber as you approach the limit and red if you go over.
The horizontal line marked SEE MORE CUTOFF inside each panel shows where that platform truncates the preview before someone has to click to expand. Get your hook in before that line. The cutoffs:
Front-load your strongest line. If you can't tell what comes before the cutoff at a glance, look at the divider in the panel.
If your content is longer than 280 characters, X automatically splits it into a numbered thread (Tweet 1/4, Tweet 2/4, etc). Each tweet has its own Copy button. The "Copy all" button at the top of the X panel grabs all of them at once, separated by blank lines.
If you have an X Premium account and want long posts as single tweets, switch the dropdown next to the X panel from "Standard" to "Premium." The character limit jumps to 25,000 and threading turns off.
When your LinkedIn post contains a link, you'll see a separate "First comment" sub-block appear below the main output. It holds just the URL.
The reason: LinkedIn can suppress reach on posts with outbound links. A common workaround is to publish the post without the link, then drop the link in the first comment. Copy the main post first, post it, then copy the first-comment block and add it as the first comment.
You don't have to do this. If you don't mind the reach trade-off, just paste the main output (which includes the link inline) and skip the first-comment step.
Instagram strips blank lines between paragraphs when you paste a caption. The tool inserts an invisible character (Braille blank, U+2800) on those lines so the spacing actually survives. The "Preserve spacing" toggle controls this — it's on by default.
If your post has hashtags, a separate "Hashtags" sub-block appears with them grouped together and a count. Instagram allows up to 30, but current best practice is 3-5 relevant ones. The counter warns you if you're over.
Links in Instagram captions aren't clickable. The tool keeps the URL in the caption but flags this — use "link in bio" or a sticker if you need someone to click through.
Below the main panels, there's a section for generating LinkedIn carousels — the swipeable PDF documents that show up as slide decks in the feed.
Each Section heading in your writing starts a new slide. Click the Section button on a line of text to mark it as a section heading. The content under that heading is what appears on that slide.
If you mark a line at the top of your document as the Title, that becomes the title slide (slide 1).
So if you write something structured like this:
This One Trick Will Change Your LinkedIn ← Title
The problem ← Section
Most posts get crickets. Here's why.
What works ← Section
Three things, in order: hook, idea, ask.
Try this today ← Section
Rewrite your best post's first line.…you get a 4-slide carousel: title + 3 body slides.
Below the template dropdown, a small preview shows what your slides will look like. Use the Previous and Next arrows to click through every slide before downloading. The indicator shows which slide of how many you're looking at.
The preview is the fastest way to spot problems: if a slide looks too crowded, add another Section heading to split it. If a section looks empty, you may have placed the heading too early.
Pick from the dropdown. Light, Dark, and Accent are minimal styles. Wedge adds graphic ink-blue corners for visual interest. Switch templates anytime — the preview updates instantly.
If a slide has too much content to fit, the tool flows it onto a continuation slide automatically. Cleaner approach: split it yourself by adding another Section heading inside the long content, so you control where the break happens.
Click Download PDF. You'll get a square multi-page PDF. Upload it to LinkedIn as a document attachment when posting, and LinkedIn will render it as a swipeable carousel.
Refresh the page. Most clipboard issues are fixed by a reload. If it still doesn't work, your browser may be blocking clipboard access; check the address bar for a clipboard permission prompt.
LinkedIn and Instagram occasionally re-process pasted text in unexpected ways. The Unicode bold should survive; line breaks usually do. If something specifically doesn't survive, try pasting from the panel into a plain text editor first, then from there into the platform — that strips any hidden formatting from your clipboard that the platform might be choking on.
Some mobile browsers handle PDF downloads differently. Try it from desktop first to confirm the file is generating correctly; if it does, the issue is mobile-specific and there are workarounds (long-press the button, or open the page in Chrome specifically).
That's the tool. If something here is unclear, or you hit a specific issue that isn't covered, send us a note — we'll fix the guide.