Freedom251 › Text-to-Speech Software
OpenSpeaker Voice Changer
What OpenSpeaker Voice Changer is
OpenSpeaker Voice Changer converts recorded speech into another voice using ElevenLabs speech-to-speech while preserving the original delivery and pacing. It accepts MP3, M4A, and WAV files, with an effective direct-request limit of 200 MB and a maximum duration of five hours per file. Users can select Eleven Multilingual v2 or English v2 and adjust stability, similarity, style, speaker boost, noise removal, and transcript options. The converted audio is downloadable as an MP3. The tool is available on the web and through an asynchronous API: a POST request to /v1/task/voice-changer returns a task_id for polling or webhook delivery. OpenSpeaker identifies ElevenLabs as the connected service and lists character voice replacement, consented localization, narration that preserves a performance, and voice-style experiments as uses. Premium credits share a balance across voice, audio, music, image, and API workflows. Credit packages are listed at $5 a month for one-, three-, and nine-month validity, and $5, paid once for the no-expiry package. There is no free plan.
Who it suits
This tool may suit people adapting recorded performances for character voices, consented localization, or narration. API access may also fit developers integrating voice conversion into a workflow.
What it does well
- Accepts MP3, M4A, and WAV uploads.
- Supports files up to five hours long.
- Provides adjustable voice and transcript options.
- Exports converted audio as MP3.
- Offers an asynchronous API.
What to know first
- No free plan is listed.
- Direct requests have an effective 200 MB cap.
- ElevenLabs is the identified connected service.
Limits
There is no free plan. Each direct-request file is capped at 200 MB and five hours, and premium usage draws from a shared credit balance across OpenSpeaker workflows.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| OpenSpeaker Premium — 3 months | per 1,000,000-credit package in the current program · 1,000,000 premium credits · valid 3 months · API included | $5 a month |
| OpenSpeaker Premium — 9 months | per 1,000,000-credit package in the current program · 1,000,000 premium credits · valid 9 months · API included | $5 a month |
| OpenSpeaker Premium — No expiry | per 1,000,000-credit package in the current program · 1,000,000 premium credits · no expiry · API included | $5, paid once |
| OpenSpeaker Premium — 1 month | per 1,000,000-credit package in the current program · 1,000,000 premium credits · 11 active AI tools · API included | $5 a month |
| 1 month | per 1,000,000-credit package in the current program · 1-month credit validity · API included · shared premium balance | $5, paid once |
| 3 months | per 1,000,000-credit package in the current program · 3-month credit validity · API included · shared premium balance | $5, paid once |
| 9 months | per 1,000,000-credit package in the current program · 9-month credit validity · API included · shared premium balance | $5, paid once |
| No expiry | per 1,000,000-credit package in the current program · No expiry · API included · shared premium balance | $5, paid once |
As openspeaker.ai lists them, read 30 Sept 2026. The maker's own page has the final word.
Getting started
- Open the Voice Changer website
- Choose a listed premium credit package
- Upload an MP3, M4A or WAV file
- Select a voice model and adjust available controls
- Submit the conversion and download the MP3 result
Verdict
OpenSpeaker Voice Changer offers adjustable speech conversion through a web tool and API, with MP3 downloads. Check the upload limits, connected service, and credit validity options before choosing a package.
Questions
What does OpenSpeaker Voice Changer do?
It converts recorded speech into another voice with ElevenLabs speech-to-speech while retaining the original performance and pacing.
Which input and output formats are supported?
You can upload MP3, M4A or WAV files. Converted audio is exported as an MP3.
Is there an API?
Yes. The asynchronous POST /v1/task/voice-changer endpoint returns a task_id for polling or webhook delivery.
How much does it cost?
Packages are listed at $5 a month for one-, three- and nine-month validity. A no-expiry package is listed at $5, paid once.
Is a free plan available?
No, the service is listed as paid with no free plan.
Facts from OpenSpeaker Voice Changer's own pages
- AI training
- Eligible prompts, inputs, outputs and technical records may be used for evaluation and improvement, while identifiable voice samples require permission or another lawful basis for training. · openspeaker.ai, 15 Oct 2026
- API access
- Yes · openspeaker.ai, 20 Sept 2026
- API authentication
- Requests use the https://api.openspeaker.ai base URL and an xi-api-key header. · openspeaker.ai, 15 Oct 2026
- API documentation
- The developer site provides a machine-readable text guide and an OpenAPI JSON document. · openspeaker.ai, 15 Oct 2026
- API endpoint
- The public API exposes voice conversion through POST /v1/task/voice-changer. · openspeaker.ai, 15 Oct 2026
- API extensibility
- The API also exposes endpoints for speech, dialogue, dictionaries, voice cloning, dubbing, isolation, transcription, sound effects, music and image generation. · openspeaker.ai, 15 Oct 2026
- API integration
- Voice Changer is available through the asynchronous POST /v1/task/voice-changer API, which returns a task_id for polling or webhook delivery. · openspeaker.ai, 30 Sept 2026
- API workflow
- API jobs return a task ID that can be polled or completed through a webhook callback. · openspeaker.ai, 15 Oct 2026
- Catalog scope
- The public catalog contains 11 active tools, 20 image models and five voice sources. · openspeaker.ai, 15 Oct 2026
- Company headquarters
- The public pages opened do not state a headquarters location. · openspeaker.ai, 15 Oct 2026
- Connected integration
- The voice changer identifies ElevenLabs as its connected service. · openspeaker.ai, 15 Oct 2026
- Connected service
- The voice-changing workflow identifies ElevenLabs as its connected service. · openspeaker.ai, 30 Sept 2026
- Controls
- Users can adjust stability, similarity, style, speaker boost, noise removal and transcript options. · openspeaker.ai, 30 Sept 2026
- Conversion models
- The available conversion models are Eleven Multilingual v2 and English v2. · openspeaker.ai, 15 Oct 2026
- Core function
- Voice Changer transforms recorded speech into another voice with ElevenLabs speech-to-speech while retaining the original performance and pacing. · openspeaker.ai, 30 Sept 2026
- Credit estimate
- The maker estimates that 1,000,000 credits provide about 1,700 minutes at its low-cost TTS tier, with actual use varying by settings. · openspeaker.ai, 15 Oct 2026
- Data processing
- The AI Data Use Policy says minimum necessary inputs may be transmitted to the connected provider selected by the tool or routing logic. · openspeaker.ai, 30 Sept 2026
- Data sharing
- OpenSpeaker may send task content and settings to the connected provider needed to complete a selected workflow, including providers outside Vietnam. · openspeaker.ai, 15 Oct 2026
- Duration limit
- Each uploaded file can be up to five hours long. · openspeaker.ai, 15 Oct 2026
- Export formats
- MP3 · openspeaker.ai, 20 Sept 2026
- File-size limit
- The effective direct-request upload cap is 200 MB. · openspeaker.ai, 15 Oct 2026
- Founded year
- The public pages opened do not state a founding year. · openspeaker.ai, 15 Oct 2026
- Free plan
- No · openspeaker.ai, 20 Sept 2026
- Independent operator
- OpenSpeaker describes itself as an independent multi-provider AI workspace rather than a single proprietary voice or image model. · openspeaker.ai, 30 Sept 2026
Where OpenSpeaker Voice Changer stands on Freedom251
- Text-to-Speech Software#204 of 223
- AI Voice Conversion Software#27 of 29
- Text-to-speech tools#223 of 232