Read faster.
Stay focused.
Inkbolt bolds the first few letters of each word. Your eyes anchor on the bold letters, and your brain completes the rest automatically — letting you read articles, search results, and books with greater speed and less fatigue.
Your E-books, Converted with Care
Drop in your digital books and download a version formatted for effortless reading. The converter runs locally in your browser — nothing is uploaded or sent over the internet.
EPUB Novels & Non-Fiction
Preserves chapters, table of contents, cover art, and internal links.
PDF Documents & Papers
Overlays fixation bolding in place — images, diagrams, and tables never shift.
Plain Text Files
Uses genuine Unicode bold characters so it displays on any Kindle or e-reader.
Files stay in the identical format. Read them in Apple Books, Kindle, Kobo, or your favorite reading app.
How Fixation Reading Works
Three simple principles grounded in reading mechanics.
Eye Fixation Anchoring
When you read, your eyes do not glide continuously. They hop between fixation points (saccades). By bolding the lead letters of words, Inkbolt gives your eye an instant landing spot so your brain can decode the word without scanning every letter.
Zero Layout Shift
Inkbolt only changes font-weight on a few letters per word. It never alters your site's font-family, font size, line spacing, or margins. The layout of the webpage or book remains completely untouched.
Entirely Local & Offline
Everything happens inside your browser. No text is analyzed remotely, no files are transmitted, and no account is required. It works equally well when your machine is completely offline.
Skim Search Results & Articles Fast
When searching Google, DuckDuckGo, or reading long articles and technical documentation, your eye naturally glides past filler text straight to the core concepts.
Test search text in demoMoveable type changed how human beings share knowledge. Modern readers process thousands of words each day through digital screens.
Questions & Answers
Does Inkbolt alter my fonts or page layouts?
Never. Inkbolt strictly bumps the font-weight on the first few letters of each word using an inline style. The font-family, font size, margins, and page structure are left completely untouched.
Is this the "Bionic Reading" app?
No. Inkbolt is an independent open-source implementation of fixation-guided reading. "Bionic Reading" is an active registered trademark of Bionic Reading GmbH; Inkbolt is its own independent product, unaffiliated.
Which e-book formats can I convert?
EPUB, PDF, and TXT files directly. EPUB stays an authentic EPUB with chapters and cover art intact. PDF maintains the original layouts and diagrams with bold overlays drawn in place. TXT uses real Unicode bold characters.
Does it send my text or documents anywhere?
No. Everything runs strictly inside your local browser runtime. No server requests, no tracking, and no external dependencies.