TTS ReaderHow do you proofread by listening to your own text?
Paste or open your text in a text-to-speech reader, play it a little slower than normal speech and follow the highlighted words with your eyes, then fix each spot where what you hear is not what you meant. A voice reads exactly what is on the page, so missing words, doubled words and sentences that are hard to say come out as they really are, not as you remember writing them.
We make TTS Reader, a free text-to-speech app for iPhone, and it appears in the steps below. It reads text aloud but does not edit it: you make the fixes in the app you write in. If you write in Microsoft Word, its own Read Aloud may suit you better (see below).
Does proofreading by listening actually work?
There is some research, but not much, and none of it proves that listening finds more errors for everyone. Two studies are worth knowing:
- Raskind and Higgins, Learning Disability Quarterly, 1995. Postsecondary students with learning disabilities proofread their own writing in three ways: with a speech synthesis program that highlighted and spoke the words on screen, with another person reading the text aloud to them, and with no help. With speech synthesis they found a significantly higher percentage of all errors, and of capitalization, spelling, usage and typing errors. Having a person read aloud was better for grammar and mechanics errors.
- Pilotti, Chodorow and Thornton, Journal of General Psychology, 2004. People looked for one-letter errors that turned small function words into words that did not fit the sentence. Already knowing a passage helped them find these errors only when they could hear it, for example when it was read to them. That matters for proofreading your own writing, because no text is more familiar to you than your own.
Neither study tested modern neural voices or people without reading difficulties in everyday writing. Treat listening as one more check alongside a spell checker and a careful read, not as a replacement for them.
What should you listen for on the first and second pass?
Listening for everything at once is hard. Splitting the work into two passes, each with its own speed and its own list, keeps your attention on one kind of problem at a time. This is our suggested order, not a tested method.
| First pass: words | Second pass: sentences | |
|---|---|---|
| Speed | Slower than normal speech, with a short pause between words if your reader has one | About normal speech, 1× |
| Eyes | On the highlighted word, all the time | On the text, but you can let the sentence play before you look for the problem |
| Listen for | Missing words; doubled words (“the the”); a real but wrong word (“form” for “from”); wrong endings (“walk” for “walked”); numbers, dates and names that come out differently from what you meant | Sentences you lose track of before they end; several sentences in a row that start the same way; one word used too often; a sudden change of tone; a paragraph that seems to be in the wrong place |
| When you hear a problem | Pause, replay the sentence, mark it | Replay the sentence once; if it still sounds heavy, mark it to rewrite |
After you fix the text, listen once more only to the sentences you changed. Edits made in a hurry are a common place for a new missing or doubled word.
How do you do it in TTS Reader on iPhone?
- Bring in the text. Copy it from Notes, Pages, Mail or any other app and paste it into TTS Reader, or send it with the Share button. To proofread a whole document, open the file: Word (DOCX), ODT, RTF, plain text, Markdown, HTML and PDF all work. PDFs are read in their original page layout (how reading a PDF works).
- Set up the first pass. Choose the Learn mode: 0.8× with a short pause between words. You can also set any speed from 0.5× to 3× and add the pause yourself.
- Play and follow the highlight. TTS Reader highlights the current sentence and word as it reads. Keep your eyes on the highlighted word and compare it with what you hear.
- Replay what sounds wrong. Tap any sentence to start reading from there. Hearing a sentence twice tells you whether the problem is in the text or you just missed a word.
- Fix the text where you wrote it. TTS Reader does not edit documents, so note the sentence and correct it in Word, Pages, Google Docs or wherever the text lives.
- Do the second pass. Paste or open the corrected version, set the speed to about 1× and listen for sentences, repetition and flow.
The built-in voices run on the iPhone, so the text is not uploaded and you can proofread offline, for example on a train (how offline voices work). TTS Reader reads 31 languages and detects the language of the text: Arabic, Bulgarian, Croatian, Czech, Danish, Dutch, English, Estonian, Finnish, French, German, Greek, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Latvian, Lithuanian, Polish, Portuguese, Romanian, Russian, Slovak, Slovenian, Spanish, Swedish, Turkish, Ukrainian, Vietnamese.
What will listening not catch?
A voice can only say the words; it cannot show you how they look. Plan a separate check, by eye or with a spell checker, for these:
- Words that sound the same. “Their”, “there” and “they’re”, or “its” and “it’s”, are spoken alike, so a wrong one sounds right.
- Spelling that does not change the sound. Many misspellings are pronounced just like the correct word.
- Capitals, quotation marks, italics, spaces and formatting. Headings, bullet styles, double spaces and inconsistent quotation marks are invisible to the ear.
- Grammar and mechanics in general. In the Raskind and Higgins study above, a person reading aloud helped more with these errors than speech synthesis did.
- Pronunciation quirks. If a name, abbreviation or number sounds odd, check the text before you change it: the voice may simply be reading it in an unexpected way.
When is Word’s Read Aloud the better choice?
If your text is already in Microsoft Word, try its built-in Read Aloud first. You start it from the Review tab with Read Aloud; it highlights each word as it reads, and you can change the speed and the voice. The big advantage for proofreading: you fix a mistake right in the document you are listening to, with no copying back and forth. Microsoft says Read Aloud is available in Office 2019, Office 2021 and Microsoft 365 on Windows and Mac, and the Word app for iPhone has it too, on the Review tab of the ribbon.
On iPhone, Apple’s Speak Selection also reads text you select, in Notes, Pages or Mail, and you can correct the text in the same app. AbilityNet’s guide for iOS 26 puts the setting under Settings → Accessibility → Read & Speak, with optional word and sentence highlighting.
| Word Read Aloud | iPhone Speak Selection | TTS Reader | |
|---|---|---|---|
| Where you fix errors | In the same document | In the same app | In another app; TTS Reader does not edit |
| What it reads | Word documents | Text you select | Pasted text, DOCX, ODT, RTF, TXT, Markdown, HTML, PDF in original layout, scans |
| Replay one sentence | Previous and next paragraph | Select the sentence again | Tap the sentence |
| Slow reading with pauses between words | Reading speed slider | Speaking rate in iOS settings | Learn mode: 0.8× with a pause between words |
| Price | Part of Office 2019, 2021 or Microsoft 365 | Built into iOS | Free |
TTS Reader makes the most sense when the text is a file you cannot or do not want to edit directly, such as a PDF proof, when the document is long and you want to tap back to any sentence, or when you want to listen offline without uploading the text.
Does this help if you have dyslexia?
Listening while following highlighted words is a common way for people with dyslexia to check their own writing, and the 1995 study above was done with postsecondary students with learning disabilities. It is a reading and writing aid, not a treatment. The settings that make listening easier to follow, such as speed, pauses, text size and spacing, are on our page about text to speech for dyslexia.
Sources
- Marshall H. Raskind and Eleanor Higgins, “Effects of Speech Synthesis on the Proofreading Efficiency of Postsecondary Students with Learning Disabilities”, Learning Disability Quarterly 18(2), 141–158, May 1995: three conditions (speech synthesis with highlighting, another person reading aloud, no help); speech synthesis found a significantly higher percentage of total, capitalization, spelling, usage and typographical errors; a person reading aloud was better for grammar-mechanical errors. Abstract and bibliographic data checked 1 November 2026.
- Maura Pilotti, Martin Chodorow and Kendell C. Thornton, “Error detection in text: do feedback and familiarity help?”, Journal of General Psychology 131(3), 242–266, July 2004: one-letter errors in function words; familiarity improved error detection only when auditory feedback was available. Abstract checked 1 November 2026.
- Microsoft Support, “Listen to your Word documents with Read Aloud”: Review → Read Aloud, word highlighting, playback speed and voice selection. Checked 1 November 2026.
- Microsoft Support, “Listen to your Word documents”: Read Aloud in Office 2019, Office 2021 and Microsoft 365; previous and next paragraph; Read Aloud on iPhone from the Review tab of the ribbon. Checked 1 November 2026.
- AbilityNet, “How to read selected text aloud using Speak Selection in iOS 26 on your iPhone or iPad”, 14 October 2025: Settings → Accessibility → Read & Speak → Speak Selection; highlighting of words, sentences or both. Checked 1 November 2026.