Best AI Stem Splitters in 2026 (Vocals, Drums, Bass)

The best AI stem splitter for most people is the one that gives you both the simple two-track split and the full multi-stem version from the same upload. VdoBloom does exactly that: vocals plus instrumental for 4 credits, up to 12 stems including drums, bass, guitar and keys for 20 credits, or a karaoke video with the lyrics timed to the singing for 14 credits — all from one file of up to 25 MB and eight minutes. If you want a free, offline, unlimited option, Ultimate Vocal Remover or Demucs run on your own machine.

Updated October 2026.

Disclosure: VdoBloom is our platform.

What a stem splitter actually does

A stem is one instrument or voice group isolated from a finished mix. The classic job is two stems — the vocal on one track and everything else on another — which is what you need for a karaoke backing track or for sampling an a cappella. The harder job is many stems: drums, bass, guitar, keys and the rest, each on its own track so you can remix, replace or mute one part.

Some tools do one of those well and treat the other as an afterthought. The comparison below is about which job each is built for, not which has the cleverest model.

1. VdoBloom — best all-in-one, with karaoke as a bonus

The vocal remover and stem splitter has three modes on one screen, each showing its credit price before you run it:

Vocal remover — 4 credits. Two tracks: the vocals and the instrumental, delivered separately as downloadable files.
All stems — 20 credits. Up to 12 stems, including drums, bass, guitar and keys.
Karaoke video — 14 credits. The two-track split plus a rendered video: a gradient background, the song title shown before the first line, and lyric lines appearing in time with the vocal rather than at a fixed rate.

The upload limit is generous and clear: MP3, WAV, M4A, FLAC or OGG, up to 25 MB and eight minutes. Before it runs you confirm you own the song or have the rights to edit it, which is the right gate to have on a tool built for pulling other people’s music apart. You get each part as a separate download, so the two-track split arrives as two files rather than a zip you have to unpack.

Two details are unusually practical. First, the karaoke render refuses anything longer than six minutes with a clear message rather than truncating silently, so trim the song first. Second, you can paste the lyrics as a hint of up to 800 characters, which improves spelling and line breaks — the timing still comes from the performance, not from the text. Karaoke output is 16:9 or 9:16 on one of five gradient backgrounds.

Honest cons. The full 12-stem split is the most expensive of its three modes at 20 credits, five times the two-track price, so it is worth being sure you need that many parts. Karaoke videos cap at six minutes. Quality depends on the mix you upload — a dense, heavily compressed master is harder to separate than a clean one. And it is a cloud tool: no offline mode, and uploads need a connection. The 4-credit split is the same price as a single 1,000-character voiceover, which is a useful yardstick, but it is still a per-song cost rather than a free utility.

2. Moises — best known for practice tools

Widely known for splitting songs into stems and then letting you use them for practice: tempo and pitch changes, a metronome, chord detection and per-stem volume. If you are a musician learning a part rather than producing a track, the practice layer is the reason to choose it. Free and paid plans; check the vendor’s site for current pricing.

3. LALAL.AI — best known for clean vocal separation

Long established as a dedicated vocal-and-instrumental separator with a reputation for quality on the vocal extraction, and it also offers multi-stem separation. It is a sharp, narrow tool: you come for the separation and you get the separation. Free trials and paid tiers; check the vendor’s site.

4. Ultimate Vocal Remover — best free and offline

An open-source desktop application that runs a range of separation models locally, including several vocal and multi-stem architectures. It is free, unlimited and entirely offline, which makes it the obvious choice if you are processing a lot of songs or cannot upload them. The cost is setup and speed: you manage the models yourself, and it uses your own hardware. Free and open source.

5. Demucs — best open-source engine under the hood

An open-source separation model from Meta that produces four stems by default — vocals, drums, bass and other — and is used inside a number of other tools as the underlying engine. Running it yourself is free; the trade is that it is a command-line workflow rather than an app. Free and open source.

6. Stemroller — best free desktop app around Demucs

A free desktop application that wraps open-source separation in a point-and-click interface, so you get the free offline workflow without the command line. It does one job: split a file into stems, locally. Free.

7. Kits AI — best when you also want voice models

Known for stem splitting alongside AI voice models and voice conversion, aimed at producers building tracks. The separation is one part of a larger music-production toolkit rather than the whole product. Free and paid plans; check the vendor’s site.

8. iZotope RX — best for repair and post-production

A professional audio-repair suite known for taking apart a mix with fine control and for fixing problems — noise, hum, clicks, clipped audio — at a level that consumer tools do not attempt. It is the choice when the job is forensic rather than casual. Paid, with trials; check the vendor’s site.

Comparison table

Tool	Best for	Free option?
VdoBloom	Two-track split, 12 stems, or a karaoke video from one upload	Yes
Moises	Practising and learning parts, with tempo and pitch tools	Limited
LALAL.AI	Clean vocal extraction from a finished mix	Limited
Ultimate Vocal Remover	Free, unlimited, offline separation on your own machine	Yes
Demucs	A free open-source four-stem engine for scripted workflows	Yes
Stemroller	A free desktop app for local stem splitting without a terminal	Yes
Kits AI	Stem splitting plus AI voice models for producers	Limited
iZotope RX	Professional repair and fine-grained mix surgery	Check site

The free column is coarse by design: “Yes” for genuinely free or open-source tools, “Limited” for trials and metered free use, “Check site” where the offer moves. No prices are listed because they are each vendor’s to set — check the vendor’s site.

How to choose

You want a karaoke track or a quick vocal: VdoBloom’s two-track mode at 4 credits, or the karaoke video at 14.
You want to remix with individual instruments: the 12-stem mode at 20 credits, or a desktop tool if you have many songs to process.
You process songs constantly and cannot upload them: Ultimate Vocal Remover or Stemroller, locally and free.
You are learning the song: Moises, for the practice features.
The audio is damaged as well as mixed: iZotope RX.

Getting a better split, whatever the tool

Upload the best copy you have. Separation quality tracks source quality closely. A clean lossless file separates better than a low-bitrate rip, and the 25 MB limit is generous enough for a full WAV.
Trim to the section you need. Karaoke video caps at six minutes, and there is no reason to process an eight-minute track to use ninety seconds of it.
Paste the lyrics if you are making karaoke. It improves the spelling and the line breaks, and it costs nothing.
Listen to each stem soloed. Bleed between parts is normal and inaudible in a mix but obvious alone. If a stem is unusable on its own, re-split rather than remix around it.
Keep the original. The separated tracks are derived files — the untouched original is what you go back to if a split disappoints.

Once you have an instrumental, the video side is a natural next step: the music video workflow cuts a video to the beats of a track, and if the separated stem needs a sound added over it, the AI sound effects guide covers generating one from a description. There are fuller walkthroughs on the stem splitter tool page and the karaoke tool page.

What it costs

VdoBloom charges in credits, shown before each run: 4 for the two-track split, 20 for up to 12 stems, 14 for a karaoke video including the split and the render. New accounts start with 10 free credits and no card, which covers a two-track split twice over. The Lite plan is $15 a month for 300 credits, or $10 a month billed yearly; one-time packs start at $10.39 for 200 credits and never expire; India plans start at ₹199 a month. Failed jobs are refunded automatically. See the pricing page.

Frequently asked questions

What is the best AI stem splitter?

VdoBloom is the most complete single option if you want a two-track split, a full multi-stem version and a karaoke video from the same upload, from 4 credits. Ultimate Vocal Remover is the best free choice if you can run it on your own machine and want unlimited offline processing. LALAL.AI and Moises are the best-known dedicated services.

How many stems can I get?

VdoBloom’s two-track mode gives vocals and instrumental for 4 credits, and the all-stems mode gives up to 12 stems including drums, bass, guitar and keys for 20 credits. Four stems is the common ceiling elsewhere — Demucs, for example, produces vocals, drums, bass and other by default.

Can I make a karaoke track from a song I own?

Yes. Choose the karaoke video mode: it splits the song into vocals and instrumental and then renders a video with a gradient background, the song title before the first line and lyrics timed to the performance. It costs 14 credits and the song must be six minutes or shorter.

What file types and sizes are supported?

MP3, WAV, M4A, FLAC and OGG, up to 25 MB and eight minutes. Other formats are rejected with a message naming the supported ones, so you are not left guessing.

Is it legal to split a song into stems?

Only for material you own or are licensed to edit. VdoBloom requires you to confirm you own the song or have the rights to use it before the job runs. Separating a commercial release you have no rights to, or publishing the stems or a karaoke video made from them, is a licensing question rather than a technical one.

Upload a song and split it — choose the two-track, 12-stem or karaoke mode and see the credit price before anything runs.