“This is 1 of the best TTS and its smooth. If this is truly free i'll keep this 100%. Every other TTS says its free but has a secret. They interrupt or they just say better ai voices pay. But i like this voice. I've tried loads and this is 1 of the best ones that actually says free.”
Listen to Project Gutenberg Books
Gutenberg's own site has no read-aloud button, and only about 5,000 of its 70,000+ books have an audiobook anywhere. Press play below to hear the opening of Pride and Prejudice, then open the real book and keep going.
粘贴文字,直接念给你听
在你的浏览器本地运行 —— 不上传任何内容
选择语音(0)▾
正在加载语音…
这个 demo 是下限,不是上限
它用你设备自带的语音朗读短段落。扩展和 App 还提供更自然的 AI 语音、不限长度的文档、Kindle 网页版支持、网页实时同步高亮,以及跨语言的「解读」。
Project Gutenberg does not have a read-aloud button on its website. It does have free audiobooks for roughly 5,000 of its titles — AI-narrated by Microsoft and MIT researchers in 2023 — but those are distributed through the Internet Archive, Spotify and podcast apps rather than played on gutenberg.org. The collection holds more than 70,000 books, so the great majority have no audio of any kind. That gap is the whole point of this page: Gutenberg publishes every book as plain, well-structured HTML with no DRM and no reader app in the way, which is the easiest possible material to read aloud — so essentially the entire catalogue works. Open a book's "Read this book online: HTML" edition in Chrome or Edge, press CastReader, and it reads from where you are with the current paragraph highlighted and your position kept between sessions.
Frequently Asked Questions
What people ask before installing
Can I try it before installing anything?
Yes — the player above is already loaded with the opening of Pride and Prejudice and runs entirely in your browser, with no account and nothing uploaded. It uses your device's own voices, which is the floor of what this does. To hear it on the real book with paragraph highlighting and your position kept, open Gutenberg's HTML edition of Pride and Prejudice (ebook #1342) and press the extension.
Does Project Gutenberg have text to speech?
Not on the website. There is no read-aloud control on gutenberg.org — the books are plain HTML pages meant for reading. Listening takes a browser reader such as CastReader, or your browser's own read-aloud mode.
Does Project Gutenberg have audiobooks?
For some titles, yes. In 2023 Microsoft and MIT researchers generated AI-narrated audiobooks for roughly 5,000 Gutenberg books, and those are free. They are hosted on the Internet Archive and syndicated to Spotify and podcast apps rather than played on Gutenberg itself. With more than 70,000 books in the collection, most titles are not covered.
Which Gutenberg books can it read?
Essentially all of them, in the HTML edition. Gutenberg is unusually consistent — every title is published as clean semantic HTML with no DRM, no pagination tricks and no app wrapper, so there is no per-book setup and nothing to configure. That is the opposite of a store library, where each platform has to be handled separately.
How do I know if the book I want has an audiobook?
Search the title on the Internet Archive or in your podcast app before installing anything. If it is one of the 5,000, that recording is free and already made — use it. This page is for the other case, which is the more common one.
What about LibriVox?
LibriVox is human-narrated, volunteer-recorded, and also free — a different and often better listen when a good reader recorded your book. Coverage is uneven and quality varies by narrator, which is exactly what you would expect from volunteers. Check LibriVox first for well-known classics; fall back to reading the page aloud for everything else.
How do I make Project Gutenberg read aloud?
Open the book's "Read this book online: HTML" version rather than downloading an EPUB, then press CastReader. It reads the chapter text with the paragraph highlighted, and remembers where you stopped — which matters when the book runs 300 pages.
Should I use the HTML version or download the EPUB?
For browser listening, the HTML version. It is one long, clean page with no DRM and no app in the way. If you would rather listen on a phone, the EPUB downloads free and opens in the CastReader app for iPhone, iPad and Android.
Is it free?
Free to start, no account. Playback speeds above 1.25x and premium voices are CastReader Pro features. Gutenberg's books are free because they are in the public domain.
Will it read the licence header and transcriber's notes?
Gutenberg files open with a licence block and often close with transcriber's notes. Start playback from the first line of the actual text rather than the top of the page, or select the chapter you want and read the selection.
Also Try
Ebook to Audiobook
Listening to books you already own, without converting files
Listen to Kindle
The DRM-safe route for Kindle library books
Listen to AO3
Fanfiction that will never have an audiobook edition
PDF to Audiobook
Papers and manuals read in the right column order
Free Text to Speech
Read any webpage aloud for free
为什么 TTS 在 2026 年值得做
硬数据 —— 不是 vibe —— 来自权威来源
effect size 0.35
22 篇研究的 meta 分析显示 TTS 对阅读障碍学生的理解力提升幅度(Wood, Moxley, Tighe & Wagner, Journal of Learning Disabilities, 2018)
Source →读者怎么说 —— 包括给我们打低分的评论
下方每一条 Chrome Web Store 评论都可以在卡片链接处验证。我们不藏负面反馈 —— 我们 24 小时内回复。
“Works perfectly on vivaldi. One suggestion though. I wish it had a play button appear next to a paragraph when we hover over it. Just like in the case of speechify.”
“Extremely user friendly short keys. Placed forward backward and speed up down as Natural as it could be. Voices are great and smooth. I would recommend it over many hyped products.”
“At the very least it's better than many paid TTS models. Still not as good as ElevenReader or LAP, but maybe the best free model for TTS.”
“So glad I can finally switch voices! The default was fine but I found one I actually enjoy listening to for hours. Small thing, huge difference.”
“Best one i found, user friendly, and great voice over.”
“ChatGPT's long answers are finally listenable. Let it generate while I listen — doubles my productivity. Love the inline button next to each response.”
“I tried using this add-on to listen to an ebook on the O'Reilly learning platform, and it works smoothly. However, it always restarts from the first paragraph whenever I scroll or select a different paragraph. Please consider adding a bookmark or checkpoint feature so users can mark where the reading should begin.”
↪ Founder reply
CastReader 创始人 Yan Xu 48 小时内回复:承认问题,下个版本上线了 bookmark 功能。这条评论的反馈直接推动了 v1.2 路线图。
“Need to highlight text and select it.”
“Hard to select text.”
↪ Founder reply
CastReader 创始人 Yan Xu 24 小时内回复:道歉、询问发生的网站/浏览器、提供键盘快捷键作为绕过方案、留下 support@castreader.com 直接支持邮箱。
近期更新
我们持续测试、改写、上线。每条更新都带真实日期。
全站信任信号刷新
用 verbatim Chrome Web Store testimonial、真实有声书市场数据、12 工具实测的 methodology 重写落地页。每条主张都有来源链接。
原生手机听读
CastReader 已提供原生 iPhone 和 Android App;Android 版可直接从 Google Play 下载。
技术深度文章发布
写了 OCR 管线的深度文章:CastReader 如何处理 Amazon 每本 Kindle 书 184 套随机字母表和 361 个独特 glyph。发表在 dev.to。
新增手机端 Kindle Read Aloud 页面
手机 App 的书架同步、Read Aloud、同步高亮、自动滚动、后台播放和进度续听,已经拆到独立落地页。
登上 Product Hunt
Daily 榜 #10,99 upvotes,4 条社区评论推动了 v1.2 路线图。
语音质量升级 —— Kokoro AI
从旧 TTS 引擎切换到 Kokoro 神经网络语音。用户评论从 'usable but robotic' 转为 'enjoy listening for hours'(来自 patrick chiang 的 Chrome Web Store 评论原话)。
提取可靠性首轮提升
英文 Kindle 书的 OCR 成功率从 78% 提升到 89%。加入了多栏页面检测(学术 PDF 适用)。
为什么有这个产品
我做 CastReader 是因为我有几百本 Kindle 书,想在晨跑时听它们,但不想为每本再买 Audible 版。技术问题 —— Amazon Cloud Reader 的字体加密 —— 最后用 OCR 解决了。产品问题 —— 让它在手机、桌面、9 种语言上真正好用 —— 花了两年迭代。我们是个小团队。我亲自回复每一条 Chrome Web Store 评论(上方 testimonials 里有证明 —— 包括 3 星和 1 星的)。如果有什么坏了或缺失,邮件 support@castreader.com。
—— Yan Xu, 创始人
最近审阅: · CastReader 团队 —— 基于 2025 测试数据
Open the Real Book
Gutenberg's HTML edition of Pride and Prejudice is one clean page, free, and needs no account. Press play and see how an hour of it holds up.
Browser extensions
For local PDF, DOCX, TXT, Markdown, and images, plus supported webpages and browser-based readers. Local EPUB import is not available.
Mobile apps
For DRM-free EPUBs and mobile reading on iPhone, iPad, and Android.
Official App Store and Google Play downloads · Chrome, Edge, and Firefox extensions


