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Audio formats

Use MP3 files (.mp3) of up to 5 MB for audio in Maglr, such as for the Audio element or a page's background audio. The file manager's audio upload accepts only MP3 files and refuses files larger than 5 MB.


  • Format: MP3 (.mp3)
  • Maximum file size: 5 MB
  • Recommended settings: 128 kbps bitrate, 44.1 or 48 kHz sample rate, stereo (mono for voice-only audio)


Maglr does not convert or compress audio. Your MP3 file is published exactly as you upload it, so the settings you export it with decide both its sound and its file size.


Supported audio format


MP3 (.mp3) is the audio format to use in Maglr. When you add audio to the Audio element or a page's background audio, the upload area in the file manager accepts only MP3 files: its upload link reads "Choose a new .mp3". Other audio formats, such as WAV, M4A, AAC or FLAC, are refused there with the message "The selected file type is not allowed". Convert an audio file in another format to MP3 in your audio editor or a conversion tool before you upload it.


Maximum audio file size


The file manager's audio upload accepts MP3 files of up to 5 MB. A larger file is refused with the message "The selected file is too large, maximum 5MB".


How much audio fits in 5 MB depends on the bitrate of the MP3 file:


  • At 192 kbps, about 3.5 minutes fits in 5 MB.
  • At 128 kbps, about 5 minutes fits in 5 MB.
  • At 64 kbps, about 10 minutes fits in 5 MB, which is enough quality for speech.


For longer audio, such as a spoken voice-over, export the MP3 at a lower bitrate or in mono to stay under 5 MB. Exporting at higher settings than you need does not make the audio sound better. It only makes the file larger.



Bitrate is the amount of data stored for each second of audio, measured in kilobits per second (kbps). A higher bitrate gives better sound and a larger file. MP3 files of music commonly use 128 to 320 kbps.


  • Music: export at 128 kbps. Use up to 192 kbps only if the audio is short enough to stay under the 5 MB limit for audio uploads in Maglr.
  • Speech: export at 64 to 96 kbps. Voice-only audio sounds clear at these bitrates and the file stays small.



Sample rate is how many times per second the sound is measured, in kilohertz (kHz). Export MP3 files for Maglr at 44.1 kHz or 48 kHz; both are standard. A higher sample rate does not make the audio sound better when it plays, and it increases the file size.


Mono or stereo channels


The number of channels sets whether an audio file has one sound track (mono) or separate left and right tracks (stereo).


  • Stereo (2 channels) is the standard for music and for audio with left-right effects.
  • Mono (1 channel) is a good choice for voice-only audio, such as narration. It makes the file smaller, so more minutes fit in the 5 MB limit for audio uploads in Maglr.


A mono file plays on stereo speakers and headphones: the same sound comes from both sides.


Naming audio files


Give each audio file a clear, descriptive name before you upload it, such as intro-voiceover-v2.mp3. A structured name tells you what the file contains and where it belongs, so you can find it quickly in the file manager. A randomly generated name makes the file harder to find later.


Frequently asked questions


Can I use WAV or M4A audio files in Maglr?


No. Use audio files in MP3 format (.mp3). The file manager's audio upload accepts only MP3 files and refuses other formats, such as WAV, M4A, AAC or FLAC, with the message "The selected file type is not allowed". Convert the file to MP3 before you upload it.


What is the maximum size for an audio file in Maglr?


The file manager's audio upload accepts MP3 files of up to 5 MB. A larger file is refused with the message "The selected file is too large, maximum 5MB". To make a file smaller, export the MP3 at a lower bitrate or in mono.


How long can an audio file in Maglr be?


The length that fits depends on the bitrate, because the file manager's audio upload accepts MP3 files of up to 5 MB. At 128 kbps, about 5 minutes fits in 5 MB. At 192 kbps, about 3.5 minutes fits. At 64 kbps, which works well for speech, about 10 minutes fits.


Why does my audio upload fail?


An audio upload in the file manager usually fails for one of these reasons:


  • The file is not an MP3: you see "The selected file type is not allowed". Convert the file to MP3 and upload it again.
  • The file is larger than 5 MB: you see "The selected file is too large, maximum 5MB". Export the MP3 at a lower bitrate or in mono, or shorten the audio, and upload it again.
  • Another upload error: you see "Upload failed, try again". Check your connection and upload the file again.

Updated on: 20/10/2026