Friday, November 6, 2026 · Asia/KarachiFree tools · No signup · Runs in your browser

Bionic Reading Converter

Bionic reading, on this page, wraps the first half of each word in Markdown bold. Hello there becomes **Hel**lo **the**re. A four-letter word splits after two letters. A one-letter word is entirely inside the marks.

New

Ordinary letters and asterisks are used so the line cannot turn into boxes the way a Unicode bold alphabet can.

How to use

  1. Paste a sentence, up to 2,000 characters.
  2. Press Emphasise. Asterisks mark the first half of each word.
  3. Reset restores Hello there.

Formula / how it works

The cut. Words are split on whitespace, which is kept. The cut is half the characters, rounded up, and at least one. Hello is five characters, half rounded up is 3, so Hel is inside the marks and lo is outside. there is five as well, so the is inside and re is outside. A two-letter word puts the first letter inside. Spaces and line breaks are not words and are copied through. The asterisks are Markdown. A renderer that understands them shows bold. A plain field shows the asterisks, which you can delete. This is not a claim that the emphasis helps anyone read. It is the split, applied consistently.

Why not Unicode bold. Unicode bold letters are missing in some fonts and become boxes. The point of a reading aid is that the word remains readable. Asterisks fail visibly. Boxes fail by hiding the letter. The bold text generator is the Unicode alphabet if you want that look and you have checked the font.

Hello there becomes Hello there. The cut is half the word, rounded up, so a one-letter word is entirely inside the marks and a four-letter word splits after two. Markdown bold is used so the line stays ordinary letters and cannot turn into boxes the way a Unicode bold alphabet can. A renderer that understands Markdown will show the emphasis. A plain field will show the asterisks. That is acceptable. The asterisks are visible and deletable. The converter does not decide whether the emphasis helps reading. It only applies the split. Two thousand characters is the cap.

Hello splits after three letters because five rounded up at half is three. Note splits after two because four divided by two is two. there splits like Hello. The asterisks are the marks you can search for. A plain-text search for Hello will fail once the asterisks are inside the word. Search for Hel if you need to find it, or keep a copy without marks. The tool does not offer a second style. There is no italic half and no colour. Markdown bold is the whole effect. A renderer that ignores asterisks shows them, and the word is still readable, which is the requirement. Two thousand characters is a long note. Most examples are one sentence.

Hello and Note are the two splits to remember: three letters inside the marks for a five-letter word, two letters for a four-letter word. there follows the five-letter rule. If a word looks wrongly cut, count the characters, including digits, and take half rounded up. The asterisks are then placed by that count. A renderer may hide them. A plain field will not. Either result is readable, which is the requirement that Unicode bold cannot promise on every font. Keep a copy of the sentence without asterisks if you will search for it later.

Worked examples

Hello there

Inputs: Text: Hello there

Leave the text as Hello there and press Emphasise. Hel and the sit inside the asterisks.

Result: Bionic: Hello there The first half of each word is wrapped in Markdown bold. Ordinary letters are used so the line cannot turn into boxes.

A four-letter word

Inputs: Text: Note

Change the text to Note and press Emphasise. The split is after two letters.

Result: Bionic: Note The first half of each word is wrapped in Markdown bold. Ordinary letters are used so the line cannot turn into boxes.

Use cases

  • A Markdown draft with the first half of each word marked.
  • A plain-text field where asterisks are acceptable.
  • Avoiding Unicode bold that can become boxes.
  • A consistent split you can explain.

Tips & limitations

  • A renderer may hide the asterisks and show bold.
  • A plain field will show the asterisks.
  • The cut rounds up.
  • This is not a claim about reading science.

FAQ

Why is Hello split after Hel?

Five characters, half rounded up, is three. Hel is the first three.

Why asterisks instead of special bold letters?

Special bold letters become boxes in some fonts. Asterisks stay readable.

Does a one-letter word stay plain?

No. The cut is at least one, so the letter sits inside the marks.

Are spaces changed?

No. Whitespace is copied between the words.

Is this a study of reading?

No. It only applies the split. It does not measure whether the emphasis helps.

Is the text uploaded?

No. The marks are added in the browser.

Runs entirely in your browser; your text is not uploaded. Counts and scores are heuristics, so review the output before you publish it.