Bionic Reading Online — Free Bionic Text Converter

Bionic reading highlights the first part of each word so your eyes lock fixation points faster and your brain fills in the rest. Use it free in SpeedRead — paste text, upload a file, or pull any public URL.

How to use bionic reading on SpeedRead

1. Open the SpeedRead home tool and paste text, upload PDF/EPUB/TXT, or extract a URL.
2. Start reading, then switch to Bionic Mode in the reader toolbar.
3. Optional: turn on Audio Sync for dual-channel focus, or use RSVP mode for single-word flashing.
4. Adjust theme (light, sepia, dark, AMOLED) and font size for long sessions.

When bionic reading helps

• Long articles — scan research blogs and news without losing the thread.
• Study notes — review dense paragraphs with lower cognitive load.
• Accessibility preference — some readers prefer bold fixations over pure RSVP flashes.
• Mixed sessions — switch between bionic page view and RSVP without re-uploading.

Bionic reading vs RSVP

Bionic reading keeps a full paragraph layout and boldens word prefixes. RSVP flashes one word at a fixed point with an Optimal Recognition Point (ORP) highlight. SpeedRead includes both plus standard sentence mode and Web Speech TTS — all processed in your browser for PDF, EPUB, and paste workflows.