Paste text, choose an on-device or CastReader voice, and press Play. On-device voices stay free and need no account; AI and cloned voices follow your CastReader plan.
Runs in your browser — nothing is uploaded
Device default
On-device · free · no sign-in · unlimited local playback.
On-device
Free, unlimited and no sign-in. Text stays on this device.
Free AI voices
Sign in for 20 AI voice minutes and 3 Explains each day.
Pro + cloned voices
Signed-in Free and Pro members can create multiple personal voices and play fixed previews. Applying them to Read Aloud or Explain requires Pro and shares 120 minutes per membership month.
Start free, then choose how natural you want to go
Keep using an on-device voice without an account, sign in for daily AI allowances and multiple personal voices with fixed previews, or choose Pro to apply those voices for 120 minutes per membership month.
Experience high-quality text to speech conversion with natural AI voices
Free to Use
Start with an on-device voice for free. Sign in for daily AI allowances and multiple personal voices with fixed previews; Pro can apply those voices in Read Aloud and Explain for 120 minutes per membership month.
Privacy First
On-device voices run inside your browser and do not send your text to CastReader. Cloud AI and cloned voices are clearly labeled and send only the text you explicitly choose to play.
Natural Voices
CastReader AI voices show Free or Pro access clearly. Every signed-in Free and Pro member can create multiple personal voices and play fixed previews; applying them to text requires Pro and uses the 120-minute membership-month allowance.
Lightning Fast
On-device speech starts locally. When you deliberately select an AI or cloned voice, CastReader generates only the passage you play and enforces account limits before compute begins.
Everything you need to know about our free text to speech tool
Yes. On-device voices are free and need no account. Signed-in Free and Pro members receive daily AI allowances and may create multiple personal voices with fixed previews. Applying those voices to Read Aloud or Explain requires Pro and shares 120 minutes per membership month.
No account is required for on-device voices. CastReader AI and personal-voice creation require sign-in. Free and Pro members can create multiple voices and play fixed previews; applying them to Read Aloud or Explain requires Pro and uses 120 minutes per membership month.
Text to speech (TTS) is an AI technology that converts written text into spoken audio. Our TTS tool uses advanced machine learning models to generate natural-sounding human voices that can read any text aloud, making content more accessible and easier to consume.
Voice quality depends on the source. On-device quality varies by operating system. CastReader AI voices are more natural, are grouped by language, and are labeled as Free or Pro before you select them.
No — the tool on this page plays audio in your browser and doesn't produce an MP3 or WAV file. Tools that export audio files almost always meter you by characters and require an account; this page trades file export for listening that's free, instant, and private. Read the text as many times as you like.
On-device languages depend on voices installed by your browser and operating system. CastReader AI currently provides curated voices for English, Chinese, Japanese, Spanish, French, Portuguese, Italian, Hindi, and German.
Text to speech is valuable for everyone! Students can listen to study materials, professionals can consume documents while multitasking, content creators can generate voiceovers, and people with visual impairments or dyslexia can access written content more easily. It's also perfect for creating audiobooks, podcasts, and video narrations.
On-device playback reads up to 3,000 characters per run and has no account quota. Signed-in Free and Pro members can create multiple personal voices and play fixed previews. Applying those voices requires Pro and is limited to 120 successful audio minutes per membership month.
Yes. This page offers speeds from 0.5x to 2x. On-device speeds remain free; speeds above 1.25x with CastReader AI voices require Pro.
With an on-device voice, the text stays in your browser and is not sent to CastReader. If you explicitly choose a CastReader AI or cloned voice, only the text you play is sent for speech generation; it is not presented as local processing.
Yes. The page is responsive, although available on-device voices vary by browser and operating system. CastReader also provides native apps for iPhone, iPad, and Android.
Two different answers, honestly. The paste tool on this page reads up to 3,000 characters per run — but unlike most free TTS sites, running it again costs nothing, so long text just takes a few runs. The CastReader Chrome extension skips the problem entirely: it reads whatever is already on your screen, so there's no pasting and no character counting at all.
CastReader works on supported reading platforms including Kindle Cloud Reader and canvas-rendered sites such as WeRead. On-device speech is free; signed-in Free accounts receive 20 AI voice minutes and 3 Explains daily. See our full comparison of TTS Chrome extensions.
The paste tool is intended for short text. For long articles, supported ebooks, PDFs, or Kindle Cloud Reader, use the appropriate CastReader web reader, browser extension, or mobile app. The same Free and Pro voice access rules apply.
CastReader keeps on-device speech free without sign-up and provides daily AI allowances after sign-in. Free and Pro members can create multiple personal voices and play fixed previews; applying them requires Pro and shares 120 minutes per membership month. Supported workflows include Kindle, Google Docs, and WeRead. See the Speechify comparison.
Mostly yes — right here. The tool on this page uses your device's built-in voices, so once the page has loaded, reading keeps working even on a flaky connection. Voice quality depends on your operating system: macOS and iOS ship genuinely good on-device voices, while some Windows ones sound dated. The natural AI voices in the CastReader extension and apps do need an internet connection. For a fully offline desktop setup, Balabolka (Windows, free) with downloadable voice packs is a solid option.
Can't find what you're looking for? Contact our customer support team
Side-by-side test of every free text-to-speech tool in 2026
Tested on 50+ sites — which extensions actually work
Why pay $139/yr? CastReader does the same job for free
A practical comparison of free readers and paid voice tiers
How dual-channel reading helps — tools and techniques
OCR-based TTS for Kindle Cloud Reader
Hear a document and ask for an explanation tied to the source
Convert any EPUB or PDF to audio in your browser
Hard numbers — not vibes — from authoritative sources
$2.22 billion
US audiobook sales in 2024, up 13% year-over-year (Publishers Weekly / Audio Publishers Association)
Source →51%
of US adults have listened to an audiobook in 2025 — roughly 134 million people (APA Consumer Survey 2025)
Source →2.2 billion
people globally with near- or far-vision impairment (WHO Fact Sheet, 2024). TTS is the primary access path for digital reading content.
Source →78%
of audiobook listeners multitask while listening — commute, chores, exercise (Audiolibrix Great Audiobook Survey, 2024)
Source →27.2 minutes
average single-trip US commute in 2024, up from 26.8 (US Census ACS via Statista). That's nearly an hour each day of audio-only time.
Source →effect size 0.35
measured comprehension lift from TTS for reading-disabled students across 22 studies (Wood, Moxley, Tighe & Wagner, Journal of Learning Disabilities, 2018)
Source →15.5 million
US adults with ADHD per CDC 2024 — about half diagnosed in adulthood (CDC MMWR, October 2024)
Source →Every Chrome Web Store review below is verifiable at the link in each card. We don't hide negative feedback — we answer it within 24 hours.
“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.”
“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
Replied by CastReader founder Yan Xu within 48 hours: acknowledged the issue, shipped a bookmark feature in the following release. Reviewer's verbatim feedback drove the v1.2 roadmap.
“Need to highlight text and select it.”
“Hard to select text.”
↪ Founder reply
Replied by CastReader founder Yan Xu within 24 hours: apologized, asked which site/browser the issue occurred on, provided a workaround using the keyboard shortcut, and offered direct support at support@castreader.ai.
We re-test, re-write, and ship continuously. Every entry has a real date.
Rewrote landing pages with verbatim Chrome Web Store testimonials, real audiobook market data, and tested-12-extensions methodology. Every claim now has a sourceable link.
CastReader provides native apps for iPhone and Android; Android downloads are available directly from Google Play.
Wrote up the OCR pipeline: how CastReader handles Amazon's 184 random font alphabets and 361 unique glyphs per Kindle book. Shared in dev.to.
The phone app flow now has its own landing page for bookshelf sync, Read Aloud, synced highlighting, auto-scroll, background playback, and resume progress.
Ranked #10 in Daily, 99 upvotes, 4 community comments shaped the v1.2 roadmap.
Switched from older TTS engines to Kokoro neural voices. User reviews shifted from 'usable but robotic' to 'enjoy listening for hours' (verbatim from review by patrick chiang).
OCR success rate improved from 78% to 89% on English-language Kindle books. Multi-column page detection added for academic PDFs.
I built CastReader because I owned hundreds of Kindle books and couldn't listen to them on my morning runs without buying separate Audible copies. The technical problem — Amazon's Cloud Reader font encryption — turned out to be solvable with OCR. The product problem — making it actually pleasant across phones, desktops, and 9 supported languages — took two years of iteration. We're a small team. I answer every Chrome Web Store review personally (see testimonials above — including the 3-star and 1-star ones). If something's broken or missing, email support@castreader.ai.
— Yan Xu, founder
Last reviewed: · CastReader Team — reviewed against 2025 testing data
Download the CastReader app for DRM-free EPUB import and supported mobile reading workflows.
Skip copy-pasting text. The CastReader extension reads entire articles, blogs, and ebooks directly in your browser with one click.