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

Online convert to PDF
Online Music to 432Hz converter
Online Music Pitch and Speed Changer
Online Song BPM Finder
Online MIDI to audio converter
Online convert to MP3 audio format

Recent updates

Online convert to PDF

This tool converts different input formats to Adobe Acrobat pdf documents. This tool can also be used to convert a website screenshot to a pdf (e.g. for documentation purposes). 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.

Email notifications

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How to convert a file to pdf?

  1. Choose the document file which you want to convert to pdf.
  2. Click on "Start conversion" to convert the file to pdf.
  3. Download your pdf file.



Advanced options

The advanced document options allow modification of output format specific parameters.


If you want to convert only a subset of pages then enter the page range here. Invalid or empty values will be ignored. Setting the page range does not work for all formats and can lead to corrupt converted files.


We support a wide range of input formats including: doc, docx, pdf, xls, ppt, xlsx, pptx, odt, odp, ods, html, txt, jpg, png, and many more.

Online Music to 432Hz converter

Use this tool to convert music to 432hz (Hertz). 432hz 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 432 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 432hz.
  5. Download your 432hz file.

Options

Target frequency: 432hz


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 Pitch and Speed Changer

Use this tool to change the pitch (audio key) and speed (tempo) of music independently. 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 independently change the audio speed and frequency of a MP3 file?

  1. Choose the MP3 file for which you want to change the pitch and frequency.
  2. Select the pitch in semitones.
  3. Select the speed change in percent.
  4. Select the audio format (MP3, WAV, M4A) and audio quality (optional).
  5. Click on "Start conversion" to change the pitch and speed.
  6. 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 Song BPM Finder

Use the BMP detector tool for estimating the BPM (beats per minute) of music.

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 detect the BPM of a song?

  1. Select a MP3 file.
  2. Click the "Detect BPM" button.
  3. The song's beats per minute is shown.

Advanced options

We offer two different methods (algorithms) for detecting a song's BPM. If you think that the BPM has not been correctly detected then you can try Algorithm 2.


Online MIDI to audio converter

Use this tool to convert MIDI files to high quality MP3, M4A, and lossless WAV audio. It is also possible to change MIDI effects, speed, pitch, and soundbanks. We support the following sound fonts: EAW Patches, Fluid3R (GM), Freepads, Merlin Vienna, Merlin Gold, and Airfont. 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.

Email notifications

Please login to display email notification settings.

How to convert a MIDI to a MP3 file?

  1. Choose the MIDI file you want to convert.
  2. Change the soundfont (optional).
  3. Change the tempo (speed) and pitch (optional).
  4. Add chorus, delay, and reverb (optional).
  5. Select the audio format (MP3, WAV, M4A) and audio quality (optional).
  6. Click on "Start conversion" to convert your file from MIDI to MP3.
  7. Download your MP3 file.

Advanced MIDI options

Here you can modify MIDI effects, transpose the song (pitch), change the soundbank (the soundbank defines how sounds/instruments are generated), and other properties. We support the following sound fonts: EAW Patches, Fluid3R (GM), Freepads, Merlin Vienna, Merlin Gold, and Airfont.

Advanced audio options

The advanced audio options allow modification of audio quality, trimming, and other audio conversion parameters.


Set the start and end time of the media file. Invalid or empty values will be ignored. In some cases trimming the audio can lead to corrupt output files. The input format is HH:MM:SS (HH: hours, MM: minutes, SS: seconds).


Online convert to MP3 audio format

Use this tool to convert video and audio files from many different formats to MP3. You can either select a local file or input a remote file location for conversion. 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 MP3?

  1. Choose the audio file you want to convert to MP3.
  2. Select the audio quality for the MP3 (optional).
  3. Click on "Start conversion" to convert your file to MP3.
  4. Download your MP3 file.

Advanced options

The advanced audio options allow modification of audio quality, trimming, and other audio conversion parameters.


Set the start and end time of the media file. Invalid or empty values will be ignored. In some cases trimming the audio can lead to corrupt output files. The input format is HH:MM:SS (HH: hours, MM: minutes, SS: seconds).


We support a wide range of audio and video input formats for media conversion including: 3gpp, amr, aiff, asf, adp, afc, ast, avr, avs, swf, flv, avi, Matroksa (mkv, mka), mp2, mp3, mjpeg, mp4, ogg/vorbis, Real Media/Real Audio/Real Video (ra), wav, Windows Media Audio/Video (wma, wmv), h264, h263, QickTime (mov), VP8, VP9, webm, aac, m4a (AAC), ac-3, PCM audio, flac, alac (Apple Lossless Audio Codec), DV-audio, gsm, opus, dv, mpeg, and many more.