Text to Speech Online Free — Natural AI Voice Generator
Runs 100% in your browser — your files never leave your device.
Paste any text and hear it read aloud in a natural AI voice — no upload, no account, and the audio file is yours the moment it renders. Choose from ten voices across American and British English, dial the speed in or out, and download a WAV for your video, podcast, or prototype. The voice model runs entirely on your device after a one-time download.
How it works
- 1
Type or paste your text
Up to 10,000 characters — long text is synthesized sentence by sentence and joined seamlessly.
- 2
Pick a voice and speed
Ten natural voices across US and UK English, from 0.5× to 2× speed.
- 3
Generate and download
The first run includes a one-time setup — then listen right in the page or download a WAV file.
About this tool
A voice model that never phones home
The Kokoro-82M speech model runs entirely in your browser after a one-time ~92 MB download, cached for offline use. Your text is synthesized on your own device: nothing is sent to a server, nothing is logged, and the generated audio is yours to use anywhere — videos, podcasts, prototypes, accessibility narrations. Ten voices ship with the tool, spanning US and UK English in male and female timbres.
Making long text sound natural
The model synthesizes one utterance at a time, so long inputs are split on sentence boundaries and stitched together with consistent timing. You control the delivery with the speed slider — 0.5× for careful listening, up to 2× for skim passes. Punctuation matters: commas create short breaths, periods create full stops, and question marks lift the intonation. For narration scripts, write in complete sentences and let the punctuation do the pacing.
Where AI speech fits
Generated narration is ideal for drafts and internal use: rough video voiceovers, accessibility pass-throughs for long documents, pronunciation checks, podcast cold-opens, and product walkthrough prototypes. It is not yet a substitute for a professional voice actor on flagship content — listen for the tells in emphatic phrasing — but for volume, speed, and privacy, on-device synthesis wins. Because the audio renders locally, you can safely paste drafts, unreleased copy, and personal notes.
Frequently asked questions
- Is my text uploaded anywhere?
- No. The voice model runs in your browser after a one-time download. Your text is synthesized on your own device and never sent anywhere.
- How long can the text be?
- Up to 10,000 characters per run. Longer text is synthesized sentence by sentence and joined, so pacing stays consistent throughout.
- Can I use the audio commercially?
- Yes — the generated audio is yours, and the Kokoro model weights are Apache-2.0 licensed. See our licenses page for the full attribution.
- Why does the first generation take longer?
- One-time setup downloads the voice model (~92 MB). After that it is cached and generation starts instantly, even offline.
- Does it support languages other than English?
- The shipped voices cover American and British English. Additional language voices exist upstream and can be added if there is demand.
- Can I use it offline?
- Yes — after the one-time setup completes, synthesis works without an internet connection.