Free Software Collection
Free Text-to-Speech Tools
Free text-to-speech has long been stuck in a dilemma: the natural-sounding options are cloud APIs billed per character, which means every passage you want spoken is sent to someone else first, while the offline options sound mechanical enough to suit screen readers and little more. Since 2023 local neural TTS has lifted that line — models small enough for real-time output on a Raspberry Pi now land near commercial services in listening quality. This list splits along two axes, naturalness against size and language coverage. All three are free, account-free, and run inference entirely on your machine.
3 curated recommendations
Selection Criteria
- Synthesis happens locally; no text is uploaded anywhere.
- No per-character or per-minute billing and no cap on usage.
- No account and no API key required.
- Model licence and language coverage are stated per tool.
Recommended Tools
Piper
Local neural speech synthesis fast enough for a Raspberry Pi
- Open Source
- No Ads
- No Tracking
- Offline
eSpeak NG
A few megabytes, over a hundred languages, reading aloud with no network
- Open Source
- No Ads
- No Tracking
- Offline
LocalAI
Wraps local models in an OpenAI-shaped API — point your code at a new URL
- Open Source
- No Ads
- No Tracking
- Offline
FAQ
- Which one sounds natural?
- Piper. Its models are VITS-trained and land close to commercial TTS, each file tens of megabytes, downloaded once and usable offline. Thirty-plus languages with several voices each for the major ones. It is Home Assistant's default local voice, so the home automation stack in this directory plugs straight in.
- eSpeak NG sounds robotic. Why list it?
- Because it solves a different problem. The whole program is a few megabytes, it covers more than a hundred languages and accents, it runs on very low-powered hardware, and latency is essentially zero. For screen readers, embedded devices, or pronunciation prompts across a hundred languages, it is the realistic choice and Piper is not. Many screen readers use it underneath.
- What is LocalAI doing here?
- It wraps local speech synthesis in an OpenAI-compatible API. If a program already calls a cloud TTS endpoint, changing one `base_url` moves it onto your machine with no change to the business code. Text generation, transcription and image generation share the same service, which removes glue when building something fully offline.
- Why are there not more options?
- Few in this category actually meet the hard criteria. The best-sounding open models are either in archived repositories, or are weights without a usable program around them, or put their free allowance behind a sign-in. The bar does not get lowered because a category is thin.