When it comes to editing an MP3 file, you may not always have access to professional software on your computer. Therefore, we want to show you some best free online audio editors in this article that provide a user-friendly interface and a range of features to help you quickly edit your MP3 files without the need for complex software installations. 

Part 1. 3 Best Online Audio Editors

1. TwistedWave

TwistedWave is a powerful online audio editor that stands out for its user-friendly interface and extensive editing capabilities. With TwistedWave, you can quickly trim, crop, cut, or fade MP3 files, making it an ideal choice for simple editing tasks. The platform also provides an array of advanced features, such as adding effects, normalizing audio, and adjusting equalizer settings.  Additionally, it supports various audio file formats, including MP3, WAV, AIFF, and more.

Pros:

• Provides many sound effects

• Built-in audio recording

Cons:

• Limited Technical support

• Only can edit mono files for up to 5 minutes

2. Online MP3 Cutter

If you're looking for a straightforward and hassle-free solution to quickly edit MP3 files, Online MP3 Cutter is a fantastic option. As its name suggests, this online tool focuses on providing a simple and intuitive audio editing experience. With Online MP3 Cutter, you can easily trim, fade in or out, and adjust the volume of your MP3 files. The tool also supports various audio formats, including MP3, WAV, FLAC, and more, making it versatile for different audio editing needs.

Pros:

• Supports over 300 file formats

• Fast processing

Cons:

• Limited audio editing features

3. Audio Joiner

AudioJoiner is a convenient online audio editor that specializes in merging multiple MP3 files. While its primary focus is on combining audio files, it also offers basic editing capabilities for individual MP3 files and you can upload multiple MP3 files and arrange them in the desired order before merging. It provides a visual representation of each file's waveform, allowing you to precisely align the audio segments.

Pors:

• Easy-to-Use interface

• Supports various audio formats

Cons:

• Limited storage

• Limited audio editing options

Part 2. Detailed Steps to Edit Your Audio with an Online Audio Editor

If you're familiar with the top 3 online audio editors available, you're already aware of their user-friendly nature. However, in the event that you require assistance, we're here to provide you with a step-by-step guide on how to edit your audio using one of these tools. For demonstration purposes, let's take Online MP3 Cutter as an example.

Step 1. Open the online audio editor with your browser.

Step 2. Press the “Open file” button to import your audio file.

Step 3. Choose a sound effect on the top bar and edit it according to your needs.

Step 4. Click “Save” to download it on your computer.

Bonus Part. How to Edit Your Audio with Kingshiper Audio Editor

If the online tools aren’t your preference and you'd rather utilize a desktop voice changer for modifying your voice, consider trying out Kingshiper Audio Editor. It is an all-in-one tool that is both suitable for novices and pros. Kingshiper Audio Editor not only provides some basic functions that allow you to trim, cut, and copy an audio file but also can remove background noise, add fade-in/out effects, and merge different audio into one track.

Key features of Kingshiper Audio Editor:

• Trim and merge audio files

  
  

• Change audio speed without affecting its pitch

  
  

• Convert audio from one format to another

  
  

• Remove vocals to create a karaoke track

Step 1. Install and open Kingshiper Audio Editor on your computer.

Step 2. Choose one of the effects to add to your audio files. 

Step 3. When you’ve finished, click “Export” at the top right corner. In the pop-up window, you can adjust the output settings. Then, click “Export” to save it on your PC.

The Bottom Line

This is all about the best 3 free online audio editors. With them, you can make quick edits to an MP3 file. However, if you’re a music producer or frequently require audio editing, I strongly recommend you to use Kingshiper Audio Editor which is not only user-friendly but also offers advanced features.  

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