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Bionic Reading Converter

Bold the leading letters of each word to guide the eye through long text.

Bionic reading bolds the first few letters of every word so the eye fixates there and skims the rest, which some readers find speeds them up. Choose a fixation strength and output as HTML, Markdown or Unicode bold that survives pasting into any application.

Runs in your browser
Privacy
Runs entirely in your browser — nothing is uploaded
Cost
Free, unlimited, no sign-up

Frequently asked questions

Does bionic reading actually work?

Evidence is mixed. Independent studies have not reproduced the large speed gains originally claimed, though some readers report it helps focus. Treat it as a preference, not a proven technique.

Is Unicode bold accessible?

No. Those are mathematical alphanumeric symbols, not styled letters, so screen readers either skip them or read them character by character. Use the HTML output on any page that needs to be accessible.

How to use the bionic reading converter

  1. 1Enter or paste your text.
  2. 2Set the fixation strength.
  3. 3Choose the output as.
  4. 4The result appears immediately — copy or download it.

Embed this tool

Put the working bionic reading converter on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.

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