This is a free tool that allows you to remove the vocals from a song to create a karaoke version of it.
How good the results will be depends on how the track is recorded.
If any instruments are centered, they will also get removed. also you can try
Vocal remover, equalizer, instrument remover, karaoke maker, backing tracks,

Split any song into vocals, piano, bass drums and harmonics (guitar/ keyboards)
Save the separate stems in top quality to create DJ remixes and mashups
Isolate vocals and eliminate instruments for a vocals only remix
Eliminate vocals from audio for an instrumental remix
Boost the bass or drums for a boosted remix
but most great tool is :
VOICE REMOVER AND KARAOKE MAKER
vocal remover app for android , you can easily isolate vocals and instrumentals from any sound you want
Instantly isolate voice/instruments + change pitch/tempo from any audio/video.
Remove voice from any mp3 song to make a karaoke version.
Record yourself singing to the karaoke version and share with friends
Perfect your vocal abilities by singing along to the original vocals and remove them only after recording

How is it done?
The vocals are removed by using the OOPS (Out Of Phase Stereo) effect.
The OOPS effect relies on that most songs have the the vocals perfectly centered while the instruments are panned slightly to the left and right channel.
The two channels are then subtracted from each other, and since the vocals are as present on the left channel as the right channel,
they will cancel each other out and dissapear.
you can isolate instruments by:

INSTRUMENT REMOVER
Voice remover - eliminate vocals
Drum remover - eliminate drums
Bass remover - eliminate bass
Piano remover - eliminate piano
Guitar/harmonics remover
gets original tracks from original sound Mp3, flac, wav,m4a, and others what ever file size is .
app to remove vocals from a songs
You can import files from your Smartphone and try it

Audio:
-MP3, AAC3, AAC, WAV, FLAC, AIFF (aif), OGG and WMA
Video:
-MP4, M4A, M4V, M4R, MPEG (MPG), FLV, MOV, MKV, WEBM

app support also :

3D audio:

This tool allows you to create a 3D audio version of any song directly in your browser.
3D versions of songs are popular on YouTube and with this tool you can create that 3D effect

Auto panner:

Controls how fast the audio will alternate from left to right.
(How many times the audio will travel 360 degrees per second)

Bass Booster:

This is a free tool that allows you to boost the bass of a song making it more bass heavy.
With this tool you can create the bass boost effect without having any knowledge in audio engineering.

Equalizer :

This tool allows you to equalize any audio file by changing the intensity of certain frequencies

download it now !