Choose your song
Upload MP3, WAV, FLAC, or M4A.
Acapella maker
Pick a song, press go, get the acapella. The AI removes every instrument and leaves you with the naked vocal — ready for remixes, mashups, and covers.
Drop an audio file here
MP3, WAV, FLAC, M4A, AAC, or OGG. Free tier supports 30MB and 6 minutes. Paid jobs support 500MB and 20 minutes.
Separation job
Outputs vocals, drums, bass, and other.
Uploads go to R2, processing runs through Replicate Demucs, and downloads unlock after sign-in.
Upload MP3, WAV, FLAC, or M4A.
Instruments are stripped away in about 90 seconds.
Free 30-second preview; full acapella in WAV, FLAC, or MP3 with credits.
These are self-made demo clips from original or royalty-cleared material. User uploads are private and never published.
Pop / 0:30
Original synthesized StemSlice demonstration, released for site playback.
Indie / 0:30
Original synthesized StemSlice demonstration, released for site playback.
Dance / 0:30
Original synthesized StemSlice demonstration, released for site playback.
Hip-hop / 0:30
Original synthesized StemSlice demonstration, released for site playback.
Singer-songwriter / 0:30
Original synthesized StemSlice demonstration, released for site playback.
Rock / 0:30
Original synthesized StemSlice demonstration, released for site playback.
StemSlice keeps the page useful for casual singers and serious producers without turning every visitor into a subscriber.
Pop, hip-hop, rock, EDM — if there's a lead vocal, the AI can find it.
Pair your acapella with the isolated drums and bass from the same job.
One upload, no audio engineering required.
Everything is deleted 24 hours after processing.
Practical details about quality, formats, privacy, credits, and legal use, written for people comparing stem separation tools before processing real music.
StemSlice is designed as a working AI acapella maker, not a thin landing page that sends you somewhere else after the headline. The upload panel, preview player, pricing logic, privacy notice, FAQ, comparison material, and internal tool links all live on the same page because the user intent is practical. People searching this phrase usually have a file ready, a concrete job in mind, and very little patience for account walls. The page therefore starts with the tool, explains the limits in plain language, and keeps the surrounding copy focused on decisions that matter before uploading: supported formats, preview length, file retention, download quality, legal responsibility, and when credits are required.
This workflow is useful for mashup makers, DJs, cover artists, producers, and creators turning existing songs into vocal material. A casual visitor can upload a song, hear whether the separation is good enough, and leave without creating an account. A more serious creator can use the same result to decide whether the stems are worth unlocking. That split is intentional: free preview reduces risk, while paid downloads are reserved for moments where quality matters. StemSlice avoids subscriptions for this reason. Most users do not separate songs every day, so one-time credits that do not expire fit the actual behavior of karaoke makers, remixers, cover singers, DJs, teachers, and short-form video creators better than monthly minutes that reset.
The upload flow is built around a simple promise: make a previewable acapella from a finished song and unlock full-quality stems only when the result is useful. Free users can upload MP3, WAV, FLAC, M4A, AAC, or OGG files up to 30MB and 6 minutes, with 3 free processing attempts per day. Paid jobs support files up to 500MB and 20 minutes. After the browser uploads the file, the separation job runs asynchronously and the page polls for status instead of making the user wait on a frozen screen. Once stems are ready, each track can be auditioned in the browser with a waveform preview. Free preview is limited to 30 seconds, which is enough to judge bleed, artifacts, timing, and usefulness before spending a credit.
Every completed job targets four core stems: vocals, drums, bass, and other. That makes the result more flexible than a two-track vocal remover because the drums and bass can be muted, sampled, studied, or rebuilt separately. Full downloads are gated behind 1 credit per song and are intended to include WAV, FLAC, or 320kbps MP3 output without a watermark. Free users can still use the tool for evaluation and sharing through a low-resolution 128kbps watermarked instrumental path. This keeps the free tier useful without giving away the highest-value files. Failed processing jobs should not consume credits, and unlocked downloads remain tied to the private job rather than being published as public result pages.
StemSlice treats uploaded music as private user content. Source files and generated stems are not added to the public demo wall, not indexed as separate result pages, and not reused as marketing material. The intended storage policy is short-lived: uploads and results expire after 24 hours through object storage lifecycle rules with a cleanup cron as a fallback. The legal rule is also simple: the separation tool can help you hear or prepare stems, but extracted material still belongs to the original rights holders. Personal practice, study, and private experimentation are different from commercial releases, public distribution, or monetized remixes. Users are responsible for getting permission when the source recording requires it.
Typical use cases include mashups, vocal edits, cover practice, sampling, social clips, bootleg remixes, and arrangement study. A singer can make a quick karaoke track and rehearse a difficult section. A producer can lift a vocal hook, check whether a bass line conflicts with a new beat, or study how drums are arranged under a chorus. A DJ can test whether a transition or mashup idea is worth finishing. A teacher can demonstrate how a dense mix is built without asking students to install a DAW. A content creator can preview whether the instrumental is clean enough for a short clip before unlocking the full result. The best source files are studio recordings with clear vocals and reasonable bitrate; live recordings, heavy reverb, crowd noise, and very compressed files can produce more artifacts.
1 credit unlocks one full 4-stem download. Previewing, listening, and failed processing jobs do not consume credits.
$4.9
5 credits / one-time
Buy Credits$9.9
30 credits / one-time
Buy Credits$19.9
60 credits / one-time
Buy CreditsAnswers for free limits, formats, privacy, copyright, and download quality.
Upload the song here. The AI separates the vocal from the instruments and gives you the acapella as a downloadable file.
Making and previewing acapellas is free (3 songs a day). Downloading the full-quality version costs 1 credit, from $4.9 for 5.
Remixes, mashups, DJ tools, vocal practice, and covers are the common ones. Commercial releases need permission from the rights holder.
It works best on studio recordings with a clear lead vocal. Very lo-fi or live recordings can produce artifacts.
Two names for the same job: getting the vocal out of a finished song.
Up to 6 minutes free, 20 minutes for paid users.
No. Files are encrypted and permanently deleted after 24 hours.
Extracted stems remain the property of the original rights holders. Commercial use requires their permission.