Song Key Finder-Best Song Key and BPM Finder Tool Online

If you are new to music, finding the key and bpm of your song can help you learn a lot more about it.

Key and BPM have crucial importance when it comes to harmonic mixing, DJing, and making remixes of a song. Also, they help you learn more about music. We have developed an efficient tool that helps you find the key of a song in settings.

All you have to do is upload an mp3 file to our webpage and we will analyze it to the key checker music. Our integrated bpm analyzer also finds out the bpm of the song for you.

How to Use Key Finder Tool?

Using our tool is very simple. You just need to upload the audio files you want us to analyze and we will do the rest. Here’s what you have to do:

1. Upload Audio File

Select the audio file you want to analyze for finding the key and bpm. You can drag and drop the file in our tool or manually browse and select it. Files having MP3, WAV, FLAC, AAC, OGG, or M4A extension are compatible.

2. Wait for the Analysis

The file will be uploaded in an instant and the analysis will start in seconds. If you are uploading a large audio file or if the internet connection is slow, it might take longer than a few seconds.

3. Get Results

As soon as the analysis completes, the results will appear in front of you. You will be able to see the key and bpm of your audio file. If you have uploaded multiple files, the results will appear in form of a table.

How Bpm Finder Works

The tool is programmed to analyze the music notes of the audio file to find the key and bpm. Any experienced or passionate musician can tell the key finder song just by listening to it. We decided to digitize this ability in form of a tool that will help beginners learn more about a song. Here’s how it works:

Upload to Cloud Database

First of all, files are uploaded to a cloud database from your web browser. These files are transferred temporarily and the main file remains in your browser.

Analytical Algorithms

Experts in our organization have developed advanced algorithms that will analyze the audio file and detect key and beats per minute. These algorithms are tested against millions of simulations to achieve the highest accuracy.


After the algorithm has analyzed the file several times, the results will be shown to you. The accuracy of the results depends on the quality of the audio file. Our tool guarantees the More accuracy as any commercial song key finder.

You can run the test another time just to be sure of your findings.

Why is Song Key Important for a Musician?

The key of a song has significant importance, especially to someone who is learning about harmonic mixing, remixing, classical music, or DJing.

Have you ever wondered why classical symphonies mentioned the key with the name of the song?  Just think about it, Beethoven Symphony No. 5 in C Minor, to help learners understand the key of the song.

Understanding the song key is beneficial in improving your playing technique. So, whether you are a pianist, guitarist, or DJ who is mixing music, song key has crucial importance for you.

Can a song have more than one key?

Yes, it is very common for a song to have more than one music key finder. Most popular songs have two keys, and a shift occurs between both keys throughout the song.
An experienced musician can train his ears to listen to the change in shift and identify it. If you cannot identify the change in the key, then you can use our tool to find out the keys of the song.

A song can have more than two keys, but singers and composers try to keep it in as few keys as possible. The more keys a song has, the more chaotic and less harmonic it will sound.
Improv and jazz songs are known for having multiple keys. Chaotic jazz has an amazing shift of keys throughout the song, but it doesn’t sound pleasant to many people.

What is the relationship between BPM and Song Key?

There is no specific rule as to the relationship between beats per minute and the key of a song. BPM refers to the rhythm or tempo of a song and the key refers to the combination of tones and notes.

Although they are not required to go together, musicians often correlate major keys with high BPM and minor keys with low BPM.

As a general concept, major keys are perceived as happy keys and minor keys are termed as sad keys, which isn’t correct either. A song with minor keys, but a few positive lyrics and a high BPM cannot be called a sad song, and vice versa.
If you are not able to identify the BPM and key of a song, our tool can find it for you in an instant. From the results, you will be able to see whether the BPM and song key is following traditional norms or going against them.

Does the first cord define the key of a song?

Mostly, yes The first and final notes of a song define the music key of a song.

There are a few exceptions in which a song starts with a different key and then takes a major shift, but most of the time, the first note will define the key of a song.

Sometimes, the last note of a song will be different from the first note. In that case, you can follow the main notes of the song and see which is the most common note in the song. That note will define the key of your song. Mostly, it will be the first note.

Can you write a song without a key?

Your song key defines a scale on which you will compose your whole song. However, a
musician doesn’t need to follow a key to write a song.
Theoretically, you can write a song without a key. Mixing notes isn’t necessary. But the song will not be perfect, far from it. Writing won’t be an issue, but while performing the song, it will sound just too chaotic.

Why Choose Our Tool?

Here are some of the reasons you should select our tool:

High Accuracy

The results are obtained by various algorithms that are operated on the audio sample. We claim to provide an accuracy of 70-95% in our results. The accuracy will depend on the quality of your audio file.

Your File Remains Safe

The files you upload will remain in your web browser and will not be transferred to any other system. We assure you Security: Hence, if you are checking the key or tempo of a private music file, you don’t have anything to worry about.

Free Tool

Our tool is completely free to use. You might have to see some ads to support our website, but other than that, you can analyze as many audio files as you want. You can also upload multiple audio files at once and remember it is unlimited.

Dedicated Support Team

We have a highly dedicated team of experts who are constantly improving the tool by fixing user-reported issues and bringing improvements to the algorithm. If you face any error either in working or Interface you can always report it back to us.

Frequently Asked Questions

How many song keys are there?

There are 12 major and 12 minor keys in music. Each music composition is based on one or more of these keys. The song key is a very important part of music, which helps a learner know more about the music and what it offers.

How can I find the song key quickly?

You can use our online song key finder online tool to instantly analyze and find the key of a song. Simply upload the audio file to our tool and it will do the rest. You will have your results in seconds including the key and bpm of the music file.

Can song key finder also calculate BPM?

Yes, our tool has an integrated BPM calculator feature that also calculates the BPM of the audio file you upload. The BPM of a song is also important and helps in learning more about the music.

How accurate is the song bpm finder?

The accuracy of our tool is similar, if not superior, to any other commercial key finder tool. We incorporate advanced algorithms and AI technology to ensure accuracy of up to 95%. However, the accuracy may vary depending on the quality of the audio file.

Is there an app to identify a song key?

With Auto-Key, a few seconds of audio are captured and the most likely musical key is returned. The diatonic key is also returned. Audio from a speaker, acoustic instrument or voice can be processed with Auto-Key mobile. You can find the key by tapping the Auto-Key logo on the app’s home screen