AIVoiceSeparator

AIVoiceSeparator splits songs into vocal and instrumental stems through a browser interface or REST API. It is a strong fit for creators needing occasional, high-quality exports and developers who want URL or file-based processing without a subscription. The trade-off is a modest free allowance and a single-GPU queue that may not suit sustained batch workloads.

Overview

The service targets backing-track creation, clean-vocal extraction and related stem work. Its Studio engine combines BS-Roformer, Mel-Roformer and MDX23C, with EBU-R128 loudness normalization. The maker reports an SDR of 12.97 dB, approximately 3 dB above the open Demucs baseline. That is an encouraging benchmark, though source material will still affect results.

Privacy handling is unusually explicit. Processing runs on the maker's GPU in Thailand rather than a third-party cloud; uploads and results are deleted within 24 hours, and audio is not used to train AI models. Traffic uses Cloudflare HTTPS, temporary files sit on a private machine behind Cloudflare Tunnel, and audio content is not logged. Signed-in accounts provide Google email and uid, while IP addresses support rate limiting and quota counting and request metadata is retained for debugging. Uploaders are responsible for rights to the material they process.

Key features

The web app accepts MP3, WAV, M4A, FLAC, OGG, WebM, Opus and MP4/MOV video, with a 100 MB and 20-minute ceiling. YouTube and SoundCloud URLs can be submitted directly; TikTok clips must be saved and uploaded first. Exports are MP3 320, WAV and FLAC, giving casual users and downstream editors sensible choices.

Optional Whisper transcription generates SRT, LRC and TXT lyric files and adds roughly 30 seconds to a job. BPM and key detection are included on the Free and Pro plans, extending the service beyond basic stem splitting.

The REST API accepts either a URL or uploaded file, uses X-API-Key authentication and returns vocal and instrumental stems. RapidAPI listing and support for YouTube, SoundCloud, TikTok, Bandcamp and Vimeo links broaden integration options. Dedicated capacity is available by contacting the maker when batch demand exceeds the single-GPU queue.

Pricing

Platforms

AIVoiceSeparator is offered on the web and through an API. It handles audio and video input, supports uploads up to 20 minutes, and provides MP3, WAV and FLAC exports. Developers can authenticate with an API key and send either files or supported URLs.

Who it's for

Choose it for karaoke preparation, backing-track work, vocal cleanup or applications that need a simple separation endpoint. The full-quality free plan favors evaluation and light use, while never-expiring credits are practical for occasional releases. Teams processing large libraries should account for the single-GPU queue and arrange dedicated capacity rather than assume immediate batch throughput.

Pros and cons

Pros

• Full Studio quality is included in the free plan, with three songs monthly and useful lyric, BPM and key tools.
• Prepaid credits never expire, impose no daily limit and charge only successful separations.
• Broad audio, video and URL support, plus API access, serves both manual and automated workflows.
• 24-hour deletion and a no-training policy reduce long-term exposure of uploaded audio.

Cons

• The free allowance is only three songs per month, so frequent users quickly need credits or Pro.
• Web uploads stop at 100 MB and 20 minutes, and TikTok requires a save-and-upload workaround.
• A single-GPU queue can constrain batch throughput unless dedicated capacity is arranged.
• Pro costs $30 a month while still limiting users to six songs per day.

Alternatives

AI Voice Isolators is the broader category guide for comparing separation tools. Pick LALAL.AI instead if you need native coverage across Android, iOS, desktop and web, accepting its free Starter limits and unavailable full downloads. AudioShake is a better match for users wanting a cross-platform service with a 200-credit starting allowance and 10-minute free files. Choose Altered Real-Time Pro for desktop speech-isolation and voice-skin features rather than song-stem separation. VocalDrop suits users who want unlimited, watermark-free separation without an account. Denoise focuses on denoising on Android and iOS, with exporting reserved for Pro. Krisp Voice Isolation targets communication isolation and enterprise batch workflows. Demixr offers a web free tier with 10 minutes monthly but tighter file and export limits. Vocly is an Android option with ads and karaoke-oriented tools.

Verdict

AIVoiceSeparator is a compelling choice for creators and developers who value full-quality processing, flexible inputs and credits that do not expire. Look elsewhere if you need a native desktop or mobile app, unlimited free volume, or dependable high-throughput batch processing without queue planning.