Transpose a song into a key that fits you — use it as a key changer mp3, or on WAV, FLAC and M4A alike.
We read the key off your file, shift it by the semitones you pick, and tell you exactly where you land — A minor to B minor, not "+2".
By ShinobiTools Team · Last updated: August 2026
Full-quality stems. No account, no per-track fee. Same model and same 192 kbps (or lossless WAV) as the paid tier — tracks up to 15 minutes.
It's an online song key changer and a key and bpm changer in one pass, if you moved the tempo too. This song key changer free tool is also a song key changer app — up to 15 minutes per track, free on both. A song key changer online free session works the same on free and paid — only the track length and storage window change.
Want to check the key before you commit to a shift? The key finder will find the key of a song online in about two seconds — then come back here and change it by ear.
Whether you want to change a song's key or simply find out what key it's in, upload the track and this reads and shifts the key in the same pass.
Most transposers hand you "+3 semitones" and leave the counting to you. This one measures the key of your upload in the same pass as the shift, so the result says F major → A♭ major. If the audio has no clear tonal centre it says nothing instead of guessing — the same rule as our key finder.
Count from where you are to where you want to be: every semitone is one piano key including the black ones, or one fret on a guitar — a guitar key changer, in effect, without retuning the strings.
Singing along and it just sits wrong? Try one or two semitones at a time; the difference between "nearly" and "comfortable" is usually smaller than people expect. To lower key music a step or two, drag the slider down that far and listen — usually enough to sit comfortably under a voice. To drop a song's pitch by a full tone instead, go further, but small moves are usually the ones that end up sounding right.
To change key of song online without installing anything, drop the file in and drag the slider. You can change key of song by ear or by counting semitones exactly. A change key of song online free run costs nothing, same as every page here. Moving the slider is how you change key on any file, one semitone at a time. To change key of mp3 tracks, upload the file directly with no conversion first. A change key song online result always downloads as a fresh MP3. A major to minor key converter online free pass lands on the relative minor automatically. Looking for key change song help lands you on the same slider. You can change key online without installing anything, straight in the browser. A key transpose online session names the starting and landing key together once you drag the slider and press Change it. A key change online works the same way, upload first, then drag. To change music key online without a separate app, the same upload box and slider apply. If you want to change key music by ear, listen after every semitone step. Producers who music change key mid-project use the same slider each time. To change key of music tracks longer than a few minutes, split it with the audio cutter first. A transpose key online result always shows the starting and landing key together. As a music key converter it reads the starting key before you move the slider at all.
Some also move the tempo here: to change bpm of mp3 files, use the separate speed slider next to the key one. A change bpm online run works the same way, free with no account. To change bpm of song tracks, drag the speed slider before or after shifting the key. The result reads a key bpm pairing above the player once you press Change it. A bpm key reading shows there too, right next to the key. This works as a key detector once you've dragged the slider and pressed Change it, naming the starting key off the audio. Ask what key is this and drag the slider by at least a semitone to get the reading back with your render. Producers checking song bpm key get the number before deciding on a shift. A song key bpm reading appears the same way, right above the slider. A song key detector reading comes back with every render, read straight off your file the same way the key finder does. DJs matching a beat key to a set can read it here before deciding whether to shift it. As a music key analyzer it names the root note and scale, not just a semitone count. A music key identifier pass works the same on a full mix or an instrumental. Converting mp3 to key information takes the same two seconds as any other format here. Reading bpm and key together comes back with the render, right after you shift by at least a semitone. Use it as a key checker to confirm a track before adding it to a set. A key analyser reading works the same as any other detector on this page. A key analyzer reading shows the same root note and scale every time. Looking for a bpm and key detector in one upload? That's exactly what appears above the slider. Ask what key is this song and upload it — the answer beats guessing by ear. A song bpm and key reading appears together, not on two separate pages. A key and bpm detector pass runs the moment you press Change it, not before. Musicians checking the tune key before rehearsal get the same automatic reading.
Shifting the whole mix moves the backing and the vocal together. If you want the backing in a new key with no vocal — the voice removed entirely — split first: the instrumental maker gives you the backing on its own, and the acapella extractor the voice — the same split needed to shift the key karaoke-style, for a singer who wants the track a step lower than the original. Then transpose the one you kept. Only after the key, without changing anything? That's the key finder. Only after speed or pitch in plain semitones? The pitch changer is the same tool with the speed slider up front.
No. The key slider leaves the length alone; speed has its own slider.
We measure it off the audio before the shift, with the same detector as our key finder. On unclear or atonal material it says nothing rather than guessing.
Drop in an MP4 and the audio is taken out of it. You get an MP3 back, not a video.
Up to an octave either way. Three semitones or so is inaudible on most material; a full octave you will hear.
No. Your upload is deleted the moment it's processed and the stems are wiped from the server within 45 minutes (24 hours if you bought a month pass — that longer window is part of what the pass is for). Nothing is stored, shared or used to train anything — see privacy.
Just the key — this key changer for songs only moves the pitch; there's a separate speed slider if you also want the song faster or slower.
Both in one: upload the track and the key converter detects the key first — the same way as the key finder — then the slider shifts it to whichever key you land on.
Yes — StemGrab works as an audio key transposer that only touches pitch: the slider shifts the key and the length stays exactly the same, since duration has its own separate speed control.
Drag the key slider down instead of up — each step is a semitone lower. Upload the track, pick how many semitones to drop it, and download the result; the original length doesn't change.
No install needed — StemGrab runs in the browser on desktop or phone. There's nothing to download and no app to keep updated.
Drop your track into StemGrab, drag the Key slider to the semitones you want, press Change it, and download the MP3. The tool reads and names the key before and after the shift.
Yes — song key changer is exactly what this page is. Type it as keychanger, one word, and you land on the same tool. Ask for a music key changer instead and nothing changes either: upload a track, drag the key slider, and download the transposed MP3.
Yes — StemGrab is free with no account needed. It reads the key off your upload, shifts it by the semitones you set, and tells you the key you land in — all in one download.
MP3 works directly, along with WAV, FLAC and M4A — no conversion needed first. Upload the file as it is and the key slider works on it right away.
Yes — this free online key changer needs no sign-up: upload the track, drag the key slider, and download the transposed MP3. No watermark, no daily cap.
Yes — however you name it, it's the same detector, and it runs automatically the moment you upload, before you touch the key slider.
Yes — the key reading sits right above the slider the moment you upload, before you touch anything. Whether you want to find song key info, find key of any song, or reach for a find the key of a song app — this same upload gives you the answer without one.
Yes — however short the search, you land here: upload the track, see the key it's in, and drag the slider to shift it.
Yes — this works as a song key changer online: no install, no sign-up, just upload and drag the slider in your browser. Search for changing a track's key online and you'll find the identical page. Looking for an online music key changer instead? Same tool, same slider — up to an octave either way, and you always get an MP3 back.
MP3 works the same as everything else — this shifts an mp3's key directly, along with WAV, FLAC and M4A, with no separate conversion step.
How to change pitch starts with the same slider every time: drag it, listen, download. How to change the pitch of songs works identically whether it's one track or a whole playlist run through one at a time. How to change the pitch of a song specifically means dragging the Key slider until it sits right, then downloading the result. And how to change the key of a song online, without installing anything, is exactly what this page already does.
Keep the shift under a few semitones and use a full-quality export — StemGrab transposes at the same 192 kbps (or WAV) as the rest of the site, so nothing extra is lost beyond what any pitch shift costs you.
Just the key — a song key changer like this one only moves the pitch; there's a separate speed slider if you also want the song faster or slower.
Upload it and you'll see what key the song is in before you touch the slider — detected off the audio, the same way as the key finder. If you're not sure what key it's in to begin with, transposing from a known starting point beats guessing by ear.
Any semitone target works, including landing on the relative major or minor of the original key — the result names exactly where you land, like A minor to B minor.
Both, but on separate sliders — the key slider shifts pitch and the speed slider changes tempo, so you can move one, the other, or both in the same pass.
Yes — that's a common reason to use it: shift a song's key first, then run the result through the karaoke maker to strip the vocal at the new pitch.
Separate steps — shift the key here first, then make the instrumental on the karaoke maker page from that transposed file.
Yes by default — the key slider only touches pitch; tempo only changes if you also move the separate speed slider.
Two tools that chain together: this page shifts the whole song's key in semitones, and the pitch changer does finer adjustment afterward if a song is only just out of reach.
Yes — upload the track, drag the Key slider, and download the transposed MP3.
Just the key. A song changer in this specific sense only moves pitch in semitones; format stays MP3 in, MP3 out, and tempo needs the separate speed slider on the karaoke maker page instead.
Up to a full octave either way — a few semitones is inaudible on most material, but a song key changer pushed a whole octave is easy to hear, especially on vocals.
Upload the track and the reading appears above the slider before you touch anything, so you already know what is the key of a song before you commit to a change.
Not as a lookup catalogue — there's no database to browse a song by key here. Upload the one track you have and this reads its key off the audio; from there the Camelot code tells you what else would sit well next to it.
The reader names one key — whichever dominates — even on songs with a key change partway through. The slider then shifts the whole file by the same amount throughout, so split the track at the change first if you need a different shift on each half.