spantrack is an open-source CLI tool that converts standard text EPUB files into EPUB 3 format with Media Overlays, leveraging local Kokoro TTS for audio generation. It is designed for developers and publishers who need to automate the creation of accessible audiobooks with synchronized text and audio. The tool supports integration into publishing workflows and is distributed under the MIT license.
spantrack sits in PulseGate's Other dev tools category. It focuses on automating the conversion of text EPUBs into EPUB 3 audiobooks with synchronized media overlays using local TTS. It is built as an open-source project for developers working with EPUB and audiobook formats. spantrack is open source under the MIT license. The product ships for the command line.
ozefe builds and maintains spantrack, and the product first shipped in 2026. Development happens publicly on GitHub with 35 commits in the last 90 days. Key capabilities include EPUB 3 conversion, Media Overlays support, and Local TTS integration.
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