Syllune: Offline Text to Speech

Natural-sounding voices for articles, selected text and PDFs. Download a voice once, then listen offline on your computer.

Natural-sounding voices. On your computer. Syllune reads articles, selected text and PDFs with natural-sounding voices in Chrome and Firefox. Download a voice once, then listen offline on your computer. Your reading text and synthesized audio never go to a speech service. Select what you want to hear. Select a passage, right-click and choose Read selection. Syllune reads that passage and stops at its end. To hear an article, start it from the extension button or the page's right-click menu. PDFs open in a separate reader tab, preserving the original document. Browser restrictions and optional site/file permissions can affect PDF access. Keep the controls where you read. Pause, move back or forward a sentence, and adjust speed, volume or voice in one compact playback bar. Word highlighting and automatic scrolling help you follow the spoken text. There is no separate listening dashboard to keep open. Hear a voice before you download it. Press a voice's play icon for a prerecorded sample made with the same voice model and local speech engine used for reading. Choose the sound you prefer before downloading a model. English and Czech are available alongside additional languages and quality choices. Download only the voices you want, and delete them when you no longer need them. Speech quality and startup time vary by model and device. Speech runs inside the extension. No account, subscription or separately installed helper app is required. There is no advertising, analytics or telemetry. You need a connection for voice downloads, streamed samples and online source documents. Speech works offline after you install a voice and its required assets, with the source text available locally. Original application source is open source under MIT; the combined application includes GPL-covered runtime code, and voices/previews have separate terms. Source code, license notices and support: https://github.com/Fidasek009/syllune Corresponding-source download/build directions for the release, including third-party source: https://github.com/Fidasek009/syllune/blob/main/vendor/source/SOURCE-ACCESS.md. Select the tag matching your installed version for the exact source snapshot. Source access is public and free; a store reviewer account is not required.