This article describes a set of display and audio features, not a treatment. If reading has been consistently difficult in ways that affect school, work, or daily life, that is worth discussing with a professional. What follows is a straightforward look at a few adjustable settings some dyslexic adults find make reading, and listening while reading, less effortful.
Reading is not one problem, it is several
Dyslexia affects people differently, and the same page can be difficult for very different reasons: letters that seem to swap or flip, losing your place line to line, text feeling cramped or crowded, or just fatigue from sustained visual decoding. Because the underlying difficulty varies, a single fix rarely works for everyone. What tends to help more is being able to adjust several things at once, font, spacing, size, and audio, and see what combination actually reduces the effort for you specifically.
OpenDyslexic font
ReadLoud includes OpenDyslexic as a font option alongside serif, sans, and mono. OpenDyslexic gives letters heavier weighting at the bottom, which is intended to make it harder for similar shapes (like b and d, or p and q) to be mistaken for each other, and some readers find it reduces the sense of letters flipping or swimming on the page. It is not universally preferred. Some dyslexic readers find it makes no difference, and a few prefer a plain sans-serif at a larger size instead. The honest approach is to switch between OpenDyslexic and the standard fonts on the same page and notice which one actually feels easier, rather than assuming the dyslexia-specific option is automatically the right one for you.
Spacing, size, and width, adjusted independently
Font choice is one variable. ReadLoud also lets you adjust text size, spacing, and content width separately, so you are not locked into whatever combination came bundled with a font. Wider letter and line spacing gives text more room to breathe and can reduce the sense of words crowding together. A narrower content width (shorter line length) means your eyes travel less far before wrapping to the next line, which some readers find easier to track without losing their place.
There are also four themes, light, sepia, dark, and black, plus six accent colors. Contrast and brightness affect reading comfort for a lot of people, dyslexic or not, and sepia or a darker theme in particular is a common preference for reducing glare during long reading sessions.
None of these settings require audio. You can use ReadLoud purely as a more adjustable text display, with the font, spacing, and theme set the way that works for you, and add audio only when you want it.
Highlighting, synced to the actual audio
This is where listening and reading combine directly. As audio plays, ReadLoud highlights the current word, measured from the real generated audio through forced alignment rather than an estimated pace, plus a sentence-level tint so your eye has a wider anchor than just one word. For a lot of dyslexic readers, having your eye guided by audio, word by word, reduces the load of tracking your own place across a line, which is one of the more tiring parts of reading independently.
You can click any word to start playback from there, useful if you lose your spot or want to re-hear a specific sentence. There is also a focus mode that dims everything except the current sentence, cutting down how much of the page is competing for attention at once.
The sync slider
Everyone's sense of timing between hearing a word and seeing it highlighted is a little different, and for some people even a small mismatch is distracting rather than helpful. The sync slider lets you nudge the highlighting slightly ahead of or behind the audio until the timing feels right for you. It is a small control, but for anyone sensitive to that kind of mismatch, it is the difference between highlighting that helps and highlighting that gets in the way.
Speed and pausing without penalty
Speed runs from 0.5x to 4x with pitch preserved, so you can slow down for dense material without the voice turning slow and distorted, or speed up on something easier without it becoming squeaky. Pausing costs nothing, generation only runs ahead of where you are and stops when you stop, and anything already generated stays cached, so going back over a paragraph you want to re-read is free.
Voices and a pronunciation dictionary
ReadLoud has 30 voices across four engines: Fast, the default, Studio, Gemini 3.1, and Narrator, which is built for audiobook-style narration across more than 50 languages and locales. Voice quality matters for anyone listening for extended periods, a voice that sounds flat or mechanical is more tiring to stay with than one that sounds natural, and this is worth testing directly rather than assuming the default is the best fit for you. You can preview a voice before committing, and switch mid-document without losing your place.
There is also a pronunciation dictionary, useful if a voice consistently mispronounces a name, a place, or a specific word you read often. Fix it once and the correction applies going forward, rather than needing to be corrected every time it comes up.
Getting your own documents in
None of this only works on a demo document. ReadLoud accepts pasted text, a web link, or an uploaded PDF, EPUB, DOCX, HTML, Markdown, CSV, or plain text file, up to 40 MB and 900,000 characters. Whatever font, spacing, and highlighting combination works for you applies the same way whether you are reading a work document, a personal email you pasted in, or a whole book. Link extraction also works like a reader view, so a saved article does not arrive full of surrounding ads and navigation text that would otherwise interrupt the flow.
Trying it before committing
ReadLoud gives one minute of listening with no account at all, and 20 minutes with a free account (email sign-in, no password needed). That is enough to try a font and spacing combination against a real document of your own, rather than judging from a generic demo. If none of it clicks for you, that is useful information too, reading tools are genuinely not one-size-fits-all.
For more on accessibility-focused settings, see the accessibility page.