Free online conversion tools

The conversion-tool.com online tool offers a wide range of free online online conversion utilities such as audio converters, document converters, eBook converters, hash generators, and other tools.

Popular converters

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Online Song Key finder

Use this tool for finding the key of a song.

Source file


You can either enter a remote URL (e.g. a location where the source file is located) or a local file from your device. If both, an URL and a local file are selected then one of them is ignored.

How to find the key of a song?

  1. Select a MP3 file.
  2. Click the "Find song key" button.
  3. The song's key is shown.

Online Music Speed Changer

Use this tool to change the speed (tempo) of music without changing the pitch. This tool is useful for music training, transcription, instrument learning (piano, guitar, flute, etc.), or just for music slow down or speed up. If you are logged in you can opt-in to get notified by email once the conversion is finished.

Source file


You can either enter a remote URL (e.g. a location where the source file is located) or a local file from your device. If both, an URL and a local file are selected then one of them is ignored.


Only check this if the link points to a video portal and not directly to an audio or video file. Note: YouTube is not supported.
We support import from many video portals including Vimeo, Dailymotion, SoundCloud, BlipTV, Arte, Ard, 3Sat, Orf.at, Flickr, Instagram, Facebook, Metacafe, MTV, Myspace, MyVideo.de, NBA, NBC, NHL, Rottentomatoes, Sina, Slideshare, Space, Spiegel, Tumblr, Vice, ustream, Vevo, Weibo, Yahoo, ZDF, and others.

Email notifications

Please login to display email notification settings.

How to change the audio speed of a MP3 file?

  1. Choose the MP3 file for which you want to change the speed.
  2. Select the playback speed.
  3. Select the audio format (MP3, WAV, M4A) and audio quality (optional).
  4. Click on "Start conversion" to change the speed.
  5. Download your converted file.

Options

The speed change is given in percent (%). This means, a value of "-50" plays back the audio at half the speed. A value of 100 means that the music playback speed is doubled.

Two different algorithms are provided - a time-based and a frequency-based (FFT). Generally Algorithm 1 yields better results, but depending on the input music also Algorithm 2 can sound better.


Online Music Frequency Changer

Use this tool to change frequency of music without changing the playback speed. This tool is useful for music training, transcription, instrument learning (piano, guitar, flute, etc.), or just for fun. If you are logged in you can opt-in to get notified by email once the conversion is finished.

Source file


You can either enter a remote URL (e.g. a location where the source file is located) or a local file from your device. If both, an URL and a local file are selected then one of them is ignored.


Only check this if the link points to a video portal and not directly to an audio or video file. Note: YouTube is not supported.
We support import from many video portals including Vimeo, Dailymotion, SoundCloud, BlipTV, Arte, Ard, 3Sat, Orf.at, Flickr, Instagram, Facebook, Metacafe, MTV, Myspace, MyVideo.de, NBA, NBC, NHL, Rottentomatoes, Sina, Slideshare, Space, Spiegel, Tumblr, Vice, ustream, Vevo, Weibo, Yahoo, ZDF, and others.

Email notifications

Please login to display email notification settings.

How to change the audio frequency of a MP3 file?

  1. Choose the MP3 file for which you want to change the frequency.
  2. Select the frequency.
  3. Select the audio format (MP3, WAV, M4A) and audio quality (optional).
  4. Click on "Start conversion" to change the frequency.
  5. Download your converted file.

Options

The source and target frequency are both with respect to the standard A (usually 440 Hertz). Please use the Audio Frequency Converter app for non-standard frequencies.

Two different algorithms are provided - a time-based and a frequency-based (FFT). Generally Algorithm 1 yields better results, but depending on the input music also Algorithm 2 can sound better.


Online Music to 936Hz converter

Use this tool to convert music to 936hz (Hertz). 936hz music is well known to increase well-being, is often said to sound better, be more harmonic, and have transcendental powers.
Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies. If you are logged in you can opt-in to get notified by email once the conversion is finished.

Source file


You can either enter a remote URL (e.g. a location where the source file is located) or a local file from your device. If both, an URL and a local file are selected then one of them is ignored.


Only check this if the link points to a video portal and not directly to an audio or video file. Note: YouTube is not supported.
We support import from many video portals including Vimeo, Dailymotion, SoundCloud, BlipTV, Arte, Ard, 3Sat, Orf.at, Flickr, Instagram, Facebook, Metacafe, MTV, Myspace, MyVideo.de, NBA, NBC, NHL, Rottentomatoes, Sina, Slideshare, Space, Spiegel, Tumblr, Vice, ustream, Vevo, Weibo, Yahoo, ZDF, and others.

Email notifications

Please login to display email notification settings.

How to convert music to 936 Hertz?

  1. Choose the MP3 file you want to convert.
  2. Change the source frequency (Optional).
  3. Select the audio format (MP3, WAV, M4A) and audio quality (optional).
  4. Click on "Start conversion" to change the frequency to 936hz.
  5. Download your 936hz file.

Options

Target frequency: 936hz


The source and target frequency are both with respect to the standard A4 (usually 440 Hertz). Please use the Audio Frequency Converter app for non-standard frequencies.

Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies.

Two different algorithms are provided - a time-based and a frequency-based (FFT). Generally Algorithm 1 yields better results, but depending on the input music also Algorithm 2 can sound better.


Online Music to 852Hz converter

Use this tool to convert music to 852hz (Hertz). 852hz music is well known to increase well-being, is often said to sound better, be more harmonic, and have transcendental powers.
Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies. If you are logged in you can opt-in to get notified by email once the conversion is finished.

Source file


You can either enter a remote URL (e.g. a location where the source file is located) or a local file from your device. If both, an URL and a local file are selected then one of them is ignored.


Only check this if the link points to a video portal and not directly to an audio or video file. Note: YouTube is not supported.
We support import from many video portals including Vimeo, Dailymotion, SoundCloud, BlipTV, Arte, Ard, 3Sat, Orf.at, Flickr, Instagram, Facebook, Metacafe, MTV, Myspace, MyVideo.de, NBA, NBC, NHL, Rottentomatoes, Sina, Slideshare, Space, Spiegel, Tumblr, Vice, ustream, Vevo, Weibo, Yahoo, ZDF, and others.

Email notifications

Please login to display email notification settings.

How to convert music to 852 Hertz?

  1. Choose the MP3 file you want to convert.
  2. Change the source frequency (Optional).
  3. Select the audio format (MP3, WAV, M4A) and audio quality (optional).
  4. Click on "Start conversion" to change the frequency to 852hz.
  5. Download your 852hz file.

Options

Target frequency: 852hz


The source and target frequency are both with respect to the standard A4 (usually 440 Hertz). Please use the Audio Frequency Converter app for non-standard frequencies.

Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies.

Two different algorithms are provided - a time-based and a frequency-based (FFT). Generally Algorithm 1 yields better results, but depending on the input music also Algorithm 2 can sound better.


Online Music to 741Hz converter

Use this tool to convert music to 741hz (Hertz). 741hz music is well known to increase well-being, is often said to sound better, be more harmonic, and have transcendental powers.
Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies. If you are logged in you can opt-in to get notified by email once the conversion is finished.

Source file


You can either enter a remote URL (e.g. a location where the source file is located) or a local file from your device. If both, an URL and a local file are selected then one of them is ignored.


Only check this if the link points to a video portal and not directly to an audio or video file. Note: YouTube is not supported.
We support import from many video portals including Vimeo, Dailymotion, SoundCloud, BlipTV, Arte, Ard, 3Sat, Orf.at, Flickr, Instagram, Facebook, Metacafe, MTV, Myspace, MyVideo.de, NBA, NBC, NHL, Rottentomatoes, Sina, Slideshare, Space, Spiegel, Tumblr, Vice, ustream, Vevo, Weibo, Yahoo, ZDF, and others.

Email notifications

Please login to display email notification settings.

How to convert music to 741 Hertz?

  1. Choose the MP3 file you want to convert.
  2. Change the source frequency (Optional).
  3. Select the audio format (MP3, WAV, M4A) and audio quality (optional).
  4. Click on "Start conversion" to change the frequency to 741hz.
  5. Download your 741hz file.

Options

Target frequency: 741hz


The source and target frequency are both with respect to the standard A4 (usually 440 Hertz). Please use the Audio Frequency Converter app for non-standard frequencies.

Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies.

Two different algorithms are provided - a time-based and a frequency-based (FFT). Generally Algorithm 1 yields better results, but depending on the input music also Algorithm 2 can sound better.


Online Music to 639Hz converter

Use this tool to convert music to 639hz (Hertz). 639hz music is well known to increase well-being, is often said to sound better, be more harmonic, and have transcendental powers.
Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies. If you are logged in you can opt-in to get notified by email once the conversion is finished.

Source file


You can either enter a remote URL (e.g. a location where the source file is located) or a local file from your device. If both, an URL and a local file are selected then one of them is ignored.


Only check this if the link points to a video portal and not directly to an audio or video file. Note: YouTube is not supported.
We support import from many video portals including Vimeo, Dailymotion, SoundCloud, BlipTV, Arte, Ard, 3Sat, Orf.at, Flickr, Instagram, Facebook, Metacafe, MTV, Myspace, MyVideo.de, NBA, NBC, NHL, Rottentomatoes, Sina, Slideshare, Space, Spiegel, Tumblr, Vice, ustream, Vevo, Weibo, Yahoo, ZDF, and others.

Email notifications

Please login to display email notification settings.

How to convert music to 639 Hertz?

  1. Choose the MP3 file you want to convert.
  2. Change the source frequency (Optional).
  3. Select the audio format (MP3, WAV, M4A) and audio quality (optional).
  4. Click on "Start conversion" to change the frequency to 639hz.
  5. Download your 639hz file.

Options

Target frequency: 639hz


The source and target frequency are both with respect to the standard A4 (usually 440 Hertz). Please use the Audio Frequency Converter app for non-standard frequencies.

Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies.

Two different algorithms are provided - a time-based and a frequency-based (FFT). Generally Algorithm 1 yields better results, but depending on the input music also Algorithm 2 can sound better.


Online Music to 528Hz converter

Use this tool to convert music to 528hz (Hertz). 528hz music is well known to increase well-being, is often said to sound better, be more harmonic, and have transcendental powers.
Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies. If you are logged in you can opt-in to get notified by email once the conversion is finished.

Source file


You can either enter a remote URL (e.g. a location where the source file is located) or a local file from your device. If both, an URL and a local file are selected then one of them is ignored.


Only check this if the link points to a video portal and not directly to an audio or video file. Note: YouTube is not supported.
We support import from many video portals including Vimeo, Dailymotion, SoundCloud, BlipTV, Arte, Ard, 3Sat, Orf.at, Flickr, Instagram, Facebook, Metacafe, MTV, Myspace, MyVideo.de, NBA, NBC, NHL, Rottentomatoes, Sina, Slideshare, Space, Spiegel, Tumblr, Vice, ustream, Vevo, Weibo, Yahoo, ZDF, and others.

Email notifications

Please login to display email notification settings.

How to convert music to 528 Hertz?

  1. Choose the MP3 file you want to convert.
  2. Change the source frequency (Optional).
  3. Select the audio format (MP3, WAV, M4A) and audio quality (optional).
  4. Click on "Start conversion" to change the frequency to 528hz.
  5. Download your 528hz file.

Options

Target frequency: 528hz


The source and target frequency are both with respect to the standard A4 (usually 440 Hertz). Please use the Audio Frequency Converter app for non-standard frequencies.

Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies.

Two different algorithms are provided - a time-based and a frequency-based (FFT). Generally Algorithm 1 yields better results, but depending on the input music also Algorithm 2 can sound better.


Online Music to 440Hz converter

Use this tool to convert music to 440hz (Hertz). 440hz music is well known to increase well-being, is often said to sound better, be more harmonic, and have transcendental powers.
Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies. If you are logged in you can opt-in to get notified by email once the conversion is finished.

Source file


You can either enter a remote URL (e.g. a location where the source file is located) or a local file from your device. If both, an URL and a local file are selected then one of them is ignored.


Only check this if the link points to a video portal and not directly to an audio or video file. Note: YouTube is not supported.
We support import from many video portals including Vimeo, Dailymotion, SoundCloud, BlipTV, Arte, Ard, 3Sat, Orf.at, Flickr, Instagram, Facebook, Metacafe, MTV, Myspace, MyVideo.de, NBA, NBC, NHL, Rottentomatoes, Sina, Slideshare, Space, Spiegel, Tumblr, Vice, ustream, Vevo, Weibo, Yahoo, ZDF, and others.

Email notifications

Please login to display email notification settings.

How to convert music to 440 Hertz?

  1. Choose the MP3 file you want to convert.
  2. Change the source frequency (Optional).
  3. Select the audio format (MP3, WAV, M4A) and audio quality (optional).
  4. Click on "Start conversion" to change the frequency to 440hz.
  5. Download your 440hz file.

Options

Target frequency: 440hz


The source and target frequency are both with respect to the standard A4 (usually 440 Hertz). Please use the Audio Frequency Converter app for non-standard frequencies.

Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies.

Two different algorithms are provided - a time-based and a frequency-based (FFT). Generally Algorithm 1 yields better results, but depending on the input music also Algorithm 2 can sound better.


Online Music to 417Hz converter

Use this tool to convert music to 417hz (Hertz). 417hz music is well known to increase well-being, is often said to sound better, be more harmonic, and have transcendental powers.
Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies. If you are logged in you can opt-in to get notified by email once the conversion is finished.

Source file


You can either enter a remote URL (e.g. a location where the source file is located) or a local file from your device. If both, an URL and a local file are selected then one of them is ignored.


Only check this if the link points to a video portal and not directly to an audio or video file. Note: YouTube is not supported.
We support import from many video portals including Vimeo, Dailymotion, SoundCloud, BlipTV, Arte, Ard, 3Sat, Orf.at, Flickr, Instagram, Facebook, Metacafe, MTV, Myspace, MyVideo.de, NBA, NBC, NHL, Rottentomatoes, Sina, Slideshare, Space, Spiegel, Tumblr, Vice, ustream, Vevo, Weibo, Yahoo, ZDF, and others.

Email notifications

Please login to display email notification settings.

How to convert music to 417 Hertz?

  1. Choose the MP3 file you want to convert.
  2. Change the source frequency (Optional).
  3. Select the audio format (MP3, WAV, M4A) and audio quality (optional).
  4. Click on "Start conversion" to change the frequency to 417hz.
  5. Download your 417hz file.

Options

Target frequency: 417hz


The source and target frequency are both with respect to the standard A4 (usually 440 Hertz). Please use the Audio Frequency Converter app for non-standard frequencies.

Note: You can use the free online Music Frequency Changer if you want to convert your music to non-standard frequencies.

Two different algorithms are provided - a time-based and a frequency-based (FFT). Generally Algorithm 1 yields better results, but depending on the input music also Algorithm 2 can sound better.