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SPECIFICTION
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Syllavox

github.com

WindowsmacOSLinuxAPIBrowser extension
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Spec score 7.5 #169 of 233 in Text-to-speech tools

Spec sheet

Purpose
Syllavox is a local-first desktop read-aloud utility for listening to text across applications using a shortcut.Read 13 Oct 2026 · github.com
Product
Syllavox is a local-first read-aloud desktop utility for students and knowledge workers who listen across applications.Read 12 Oct 2026 · github.com
Platforms
Windows 10/11 x64 is supported; macOS Apple silicon and Ubuntu 22.04/24.04 amd64 are best effort, while other listed targets are experimental.Read 12 Oct 2026 · github.com
Security
The security policy says the project is a small side project, response times cannot be guaranteed, and security reports will be reviewed as soon as practical.Read 12 Oct 2026 · github.com
Privacy
The browser extension communicates with the local application, and voice downloads occur when the user explicitly installs a voice.Read 13 Oct 2026 · github.com
Support
The project says it is a small side project and cannot guarantee security-report response times; it lists [email protected] for questions and support.Read 13 Oct 2026 · github.com
License
The source code is released under the MIT License.Read 13 Oct 2026 · github.com
API access
YesRead 20 Sep 2026 · github.com
Browser integration
The browser extension adds a context-menu action to read selected text through the running Syllavox application on the same computer.Read 13 Oct 2026 · github.com
Clipboard hotkey
The default global read shortcut is Ctrl+Alt+R and reads the current clipboard text.Read 13 Oct 2026 · github.com
Commercial use
YesRead 20 Sep 2026 · github.com
Export formats
WAVRead 20 Sep 2026 · github.com
Extension availability
Chrome and Edge packages are ready for store submission, while Firefox is experimental and store installation awaits external review.Read 13 Oct 2026 · github.com
Limits
The default maximum synthesis-unit length is 10,000 characters, configurable from 100 to 10,000, and new speech requests interrupt current playback.Read 13 Oct 2026 · github.com
Local API
A local HTTP API listens at 127.0.0.1:8765 and supports status, speak, stop, pause, resume, and voice endpoints.Read 13 Oct 2026 · github.com
Local processing
Speech synthesis and playback run on the computer without a cloud TTS service or account.Read 12 Oct 2026 · github.com
Maximum input
10000Read 20 Sep 2026 · github.com
Offline speech
Speech synthesis and playback run on the user's computer without a cloud TTS service or account.Read 13 Oct 2026 · github.com
Platform support
Windows 10/11 x64 is supported; macOS Apple silicon and Ubuntu 22.04/24.04 amd64 are best effort, with other listed targets experimental.Read 13 Oct 2026 · github.com
Playback limitation
Independent hotkey, browser, or API speech requests interrupt current playback because Syllavox does not queue them.Read 12 Oct 2026 · github.com
Reading controls
The main window supports sentence and paragraph navigation, replay, pause, resume, stop, playback speed and volume controls, and WAV export.Read 13 Oct 2026 · github.com
Release limitation
The v1.0.0 release does not include an automatic updater, and some platform release checks remain manual.Read 12 Oct 2026 · github.com
Speech engines
Piper is the default speech backend; optional builds can add Sherpa-ONNX or operating-system voices.Read 13 Oct 2026 · github.com
Voice downloads
Voice models are not included in public downloads and must be selected and downloaded separately.Read 13 Oct 2026 · github.com
Voice engines
Piper is the default voice backend, with optional Sherpa-ONNX voices and operating-system speech voices on supported platforms.Read 12 Oct 2026 · github.com

Where Specifiction places it

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