name: FreeTTS
aid: freetts
description: >-
  Cloud text-to-speech / AI voice service (freetts.org) offering neural voices across 75+ languages via a small
  REST/JSON API, plus speech-to-text, AI video and voiceover, audiobook generation, an SRT subtitle surface, and
  first-party Chrome, Edge and Firefox extensions. Built and operated by Outline Technologies (outline.ad),
  bootstrapped, founded 2025, hosted on Hetzner in Falkenstein DE behind Cloudflare. The API is a proxy over
  third-party neural TTS: the live GET /api/voices catalogue probed 2026-08-28 returned 1,410 voices across 152
  locales sourced from Google (788), Microsoft Edge (318) and Microsoft Azure (304), of which the 318 Edge voices
  are the free tier. FreeTTS publishes no OpenAPI, no apis.json, no MCP server and no agent card.
url: https://raw.githubusercontent.com/api-evangelist/free-tts/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
created: '2026-08-28'
modified: '2026-08-28'
specificationVersion: '0.21'
image: https://freetts.org/images/og-image.webp
tags:
- Text-to-Speech
- Speech Synthesis
- AI-voice
- Audio
- Media
- Accessibility
- Speech-to-Text
- Content Creation
- Developer Tools
tags_raw:
- Text-to-Speech
- Speech Synthesis
- AI Voice
- Audio
- Media
- Accessibility
- Speech-to-Text
- Content Creation
- Developer Tools
apis:
- name: FreeTTS REST API
  description: 'REST/JSON API for text-to-speech synthesis, audio and SRT subtitle download, and voice listing. Uses x-api-key
    header auth. Endpoints: POST /api/v1/tts, GET /api/audio/{file_id}, GET /api/srt/{file_id}, GET /api/voices.


    Submitted 2026-08-28 from shubham@telenow.ai with a NAME ONLY -- no apis.json, no docs URL, no provider. telenow.ai is
    a HubSpot page unrelated to freetts.org, and nothing on freetts.org links the two, so this is a third-party submission.
    freetts.org itself is healthy and serves an llms.txt; no apis.json and no OpenAPI resolve. The gate''s own research notes
    the backend proxies Microsoft Azure Neural TTS -- recorded as provenance, not as a policy problem: building a product
    on Azure TTS is that service''s intended use, unlike the model relays refused this week, which documented redirecting
    first-party CLI clients. Verified 2026-08-28.

    ENRICHMENT PASS 2026-08-28: contract discovery ran against the API host root, the docs host and every
    well-known path and found no machine-readable contract. /openapi.json, /swagger.json, /openapi.yaml,
    /api-docs, /docs and /redoc all return the Next.js catch-all 404; /api/openapi.json, /api/v1/openapi.json,
    /api/docs, /api/redoc and /api/schema all return the API application''s own JSON 404 {"detail":"Not Found"},
    so the FastAPI-style app that serves this API has its interactive docs and schema routes disabled. No
    GraphQL, no MCP endpoint, no agent card, no WSDL, no .proto. The endpoint set is larger than first
    recorded: POST /api/v1/tts, POST /api/tts-pro (expressive styles, named only in llms.txt, existence
    confirmed by a live 405 on GET), GET /api/audio/{file_id}, GET /api/srt/{file_id}, GET /api/voices and an
    undocumented GET /api/health returning 200 {"status":"ok","timestamp":<epoch>}. GET /api/voices is fully
    open - it returned 585,024 bytes and 1,410 voice objects with no credential. The /developers hero markets
    the API as "No Key Required" while the same page''s FAQ, all four code samples and the live 401
    ({"detail":"Missing x-api-key header"}) require an x-api-key header. Free-tier limits are published at
    three different values (10, 15 and 20 requests/minute) and the per-request character cap at two (1,000 and
    5,000) across two of the provider''s own pages, and no rate-limit response headers are emitted at all.
    The documented embed widget loader https://freetts.org/widget.js returns 404.'
  humanURL: https://freetts.org/developers
  baseURL: https://freetts.org/api
  tags:
  - Text-to-Speech
  - Speech Synthesis
  - AI-voice
  - Audio
  - Media
  - Accessibility
  - Speech-to-Text
  - Content Creation
  - Developer Tools
  tags_raw:
  - Text-to-Speech
  - Speech Synthesis
  - AI Voice
  - Audio
  - Media
  - Accessibility
  - Speech-to-Text
  - Content Creation
  - Developer Tools
  properties:
  - type: Documentation
    url: https://freetts.org/developers
  - type: APIReference
    url: https://freetts.org/developers#endpoints
  - type: GettingStarted
    url: https://freetts.org/developers#quickstart
  - type: LLMsTxt
    url: https://freetts.org/llms.txt
  - type: Authentication
    url: authentication/freetts-authentication.yml
  - type: ErrorCatalog
    url: errors/freetts-problem-types.yml
  - type: RateLimits
    url: rate-limits/freetts-rate-limits.yml
  - type: Conventions
    url: conventions/freetts-conventions.yml
  - type: DataModel
    url: data-model/freetts-data-model.yml
  - type: JSONSchema
    url: json-schema/freetts-voice.json
maintainers:
- FN: FreeTTS
  url: https://freetts.org
  email: info@freetts.org
generated:
  by: apis.io/add
  model: claude-opus-4-8
  confidence: 85
  at: '2026-08-28T07:30:05.533Z'
common:
- type: DomainSecurity
  url: security/freetts-domain-security.yml
- type: DeveloperPortal
  url: https://freetts.org/developers
- type: Pricing
  url: https://freetts.org/pricing
- type: SignUp
  url: https://freetts.org/login
- type: TermsOfService
  url: https://freetts.org/terms
- type: PrivacyPolicy
  url: https://freetts.org/privacy
- type: Support
  url: https://freetts.org/contact
- type: Blog
  url: https://freetts.org/blog
- type: LLMsTxt
  url: llms/freetts-llms.txt
- type: Packages
  url: packages/freetts-packages.yml
- type: Plans
  url: plans/freetts-plans-pricing.yml
- type: Lifecycle
  url: lifecycle/freetts-lifecycle.yml
- type: Conformance
  url: conformance/freetts-conformance.yml
- type: Components
  url: components/freetts-components.yml
x-enrichment:
  date: '2026-08-28'
  status: enriched
  artifacts_added: 15
  pass: local-v1