Bionic Reading Converter
Transform text to emphasize word beginnings, improving reading speed and focus. Perfect for long articles, study materials, and accessibility.
50% of each word bolded
Min word length: 1 letter
Non-bold text visibility
Space between lines
Bold text color
Original Text
Paste text to convert
Bionic Text
Live preview with formatting
Bionic formatted text will appear here...
What is Bionic Reading?
Bionic Reading is a revolutionary reading method developed by Swiss designer Renato Casutt that enhances text by bolding the first part of each word. This technique creates artificial fixation points that guide your eyes through the text and help your brain complete words faster, resulting in improved reading speed and comprehension. The bolded portions reduce eye movement and cognitive load, making reading feel more effortless.
This free online bionic reading converter uses Unicode bold characters to create text that works everywhere. Copy it to emails, documents, social media, or any text editor. The output is plain text with no HTML or formatting tags, making it universally compatible and privacy-friendly. All processing happens 100% locally in your browser—we never store or transmit your text.
How Does Bionic Reading Help ADHD?
For people with ADHD, maintaining focus while reading can be challenging. The mind tends to wander, and losing your place in a block of text is common. Bionic Reading addresses this by creating visual anchors (the bolded word beginnings) that keep your eyes moving forward and your brain engaged with the content.
The technique works because it leverages how the brain processes familiar words. When you see the beginning of a word highlighted, your brain automatically fills in the rest—a process called "word shape recognition." This reduces the mental effort required for each word, leaving more cognitive resources available for comprehension and focus.
Try our ADHD Focus preset which uses stronger fixation (more of each word bolded), larger font size, and increased line spacing—all optimized to reduce visual overwhelm and maintain attention during reading sessions.
Who Can Benefit?
📚Students & Learners
Students reading textbooks, research papers, and study materials can process content faster with bionic reading. The technique helps maintain focus during long study sessions.
Combine with Text Statistics to analyze reading complexity.
⚡Speed Readers
Speed readers looking to increase efficiency can use bionic reading as a training tool. The fixation points guide rapid eye movement through text.
Use Word Counter to track reading speed progress.
🧠Dyslexia & ADHD Support
People with dyslexia or ADHD often find bionic reading helps maintain focus and reduces the cognitive effort needed to process text.
Try the "ADHD Focus" or "Dyslexia" presets for optimized settings.
💼Professionals
Professionals processing long reports, emails, and documents can save time by converting content to bionic format for quicker review.
Use Readability Checker to analyze document complexity.
Tips for Best Results
- 1.Use presets: Start with the preset that matches your needs—ADHD Focus, Dyslexia, Speed Reading, or Balanced. Then fine-tune individual settings.
- 2.Adjust opacity: Lower opacity (30-50%) creates stronger contrast between bold and normal text. Higher opacity (70-100%) is easier on the eyes for long reading sessions.
- 3.Increase line height: For dense text, try 1.8-2.0 line height. This reduces visual crowding and helps with focus.
- 4.Font size matters: Larger text (18-22px) is often better for accessibility and reduces eye strain.
- 5.Universal compatibility: The Unicode output can be pasted anywhere—emails, documents, messaging apps, and social media posts.