Free generator, copy and paste
Bionic reading converter bold starts, faster reading
Paste a paragraph and the first letters of every word turn bold. It is plain Unicode, not a font, so the half-bold look survives the paste into posts, bios and chats.
- bionic, sans bold
- bionic, serif bold
- bionic, half of each word
Updated · strikethroughtext.online
How the converter decides what to bold
Each word is measured in letters. Words of one to three letters get only their first letter bolded, so “a”, “to” and “the” stay light and do not pull your eye. Longer words get roughly the first 40 percent, rounded up: “reading” becomes 𝗿𝗲𝗮ding, “converter” becomes 𝗰𝗼𝗻𝘃erter. The half row uses 50 percent instead.
Punctuation, numbers, emoji and line breaks pass through untouched, so lists and paragraphs keep their shape.
Why copy and paste needs Unicode
Social apps strip formatting when you paste. A word you bolded in Google Docs arrives on LinkedIn as plain text. Unicode solves this by using different characters altogether. The block called Mathematical Alphanumeric Symbols holds a bold copy of every Latin letter, and those characters look bold in any app that can show them. This converter swaps the start of each word for those characters.
The same trick powers the bold and italic text generator, and it is why bold text can be turned back into normal letters with the fancy text to normal text tool.
Where it works
| App | Result |
|---|---|
| LinkedIn posts and headlines | Works, sans bold matches the font best |
| X and Threads | Works in posts, replies and bios |
| Reddit, Discord, Telegram | Works anywhere text is shown |
| Instagram captions and bios | Works, though some Android fonts render bold slightly wider |
| Email subject lines | Works in most clients, but may look spammy |
Tips for readable posts
- Use it on a hook, not a novel. Two or three bionic lines at the top of a post catch the eye. A whole page of it gets tiring.
- Keep keywords plain. Search inside LinkedIn and X matches exact characters, so 𝗿𝗲𝗮ding will not match “reading”. Put the words you want to be found by in a plain sentence too.
- Check the length. Each bold letter is a single character on most platforms, but some count it as two. Pick a platform under Posting to to see the limits.
- Pair it with clean structure. Short paragraphs and clear bullet points do as much for skimming as bold does.
Questions people ask
What is bionic reading?
It is a way of laying out text where the first part of each word is bold. The bold start gives your eye a fixation point, and your brain fills in the rest of the word. Many people, including some readers with ADHD, say it helps them skim long text without losing their place.
How is this different from the Bionic Reading app?
The app styles text on screen with a real bold font, which disappears when you copy it. This converter swaps the letters for Unicode bold characters instead, so the effect travels with the text into places that have no formatting at all, like a LinkedIn post or an X bio.
Does it work with other languages?
Unicode only has bold versions of the basic Latin letters A to Z and digits. Accented letters such as é or ñ, and other scripts such as Cyrillic or Japanese, stay as they are. English, Indonesian and most text without accents converts fully.
Is half-bold text accessible?
Not very. Screen readers may read Unicode bold letters oddly or skip them, and search will not find bolded words. Use bionic text for short posts and visual hooks, and keep important information in plain text too.
Which row should I copy?
Sans bold blends with the fonts on LinkedIn, X and most phones. Serif bold is more noticeable. The half-of-each-word row bolds more letters, which some readers find easier on longer words.