[Audio tools](/tools.md#audio-tools)

# Convert MP3 to WAV online

Convert MP3 audio to an uncompressed WAV file.

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## Try it with your file

Drop your MP3 audio file here.

Drop your MP3 audio file here.

or choose a file from your device

Accepts MP3 files up to 25 MB.

Demo files are processed temporarily and should not contain sensitive information.

* ## Try the real workflow

  Use your own file and inspect a downloadable result before building anything.
* ## Real media processing

  Uppy sends the upload into a live Transloadit Assembly, not a browser-only mock.
* ## Designed for quick tests

  Files are processed temporarily, so you can evaluate the result before keeping anything.

Three steps, no installation

## How to use this tool

1. Step 1

   ### Upload a file (MP3)

   Choose a supported file (MP3) from your device. Uppy handles the browser upload.
2. Step 2

   ### Let Transloadit process it

   Run “Convert to WAV” on Transloadit’s distributed processing platform and watch its progress.
3. Step 3

   ### Use the finished result

   Inspect and download your files (WAV audio), or connect the workflow to your own storage.

More free media tools

## Keep exploring what your file can become

* [Audio transcription](/tools/audio-transcription.md)
* [WAV to MP3](/tools/wav-to-mp3.md)

[View all tools](/tools.md)

Good to know

## Frequently asked questions

How does the tool “MP3 to WAV” work?

Upload a supported file (MP3), run the tool, and download your files (WAV audio). The page sends your upload through Uppy into a real Transloadit Assembly, so the result demonstrates the same processing platform available through the API.

What is the maximum file size?

Files can be up to 25 MB on this public utility. Production workflows can accept larger files, process batches, import directly from cloud storage, and create several outputs in parallel.

Are uploaded files stored permanently?

The public tool processes files temporarily. Do not upload sensitive material. A production workspace gives you control over authentication, storage destinations, and retention.

Can I automate “MP3 to WAV” with an API?

Yes. The same processing capability is available through reusable Transloadit Templates. Trigger it from Uppy, a backend SDK, or an API request, then send results to storage and services you control.

What other file tools are available?

Browse the category “Audio tools” for related utilities. Each page runs a real upload and produces a downloadable result.

Make audio useful everywhere

## Automate “MP3 to WAV” in your product

A format change is often only the beginning. Normalize playback, create searchable transcripts, generate visual assets, and deliver every result to the systems your product already uses.

* ### Consistent playback

  Normalize incoming audio into formats and settings your product can rely on.
* ### Searchable speech

  Turn speech into text that can power search, captions, summaries, and analysis.
* ### More than one output

  Create waveforms, previews, and alternate outputs alongside the primary track.
* ### Flexible ingestion

  Process uploaded audio or import it directly from storage and remote sources.
* ### Connected workflows

  Send completed files to your storage and notify your application with webhooks.
* ### Parallel processing

  Run independent Steps in parallel instead of waiting for a long serial pipeline.

Add on-demand delivery

## Deliver image previews on demand

Smart CDN combines a reusable Transloadit Template with URL parameters and global caching. The live example below changes to match this kind of media.

Live Smart CDN transformation

Generated on demand, cached at the edge

my-app.tlcdn.com/preview/joakim\_karud-rock\_angel.mp3?w=560\&h=420\&f=jpg\&r=fit\&vs=frame\&v=1

Choose the audio preview

Album artworkUse embedded artwork when the audio includes itFile iconUse a predictable fallback for lists and searchSquare previewFit artwork into a compact square card

What changes at the edge

Generate artwork or a compact file icon from audio on demand, without making listeners download the source first.

Delivered resultReal URL Transform response

![Artwork preview generated from an audio file](https://my-app.tlcdn.com/preview/joakim_karud-rock_angel.mp3?w=560\&h=420\&f=jpg\&r=fit\&vs=frame\&v=1)Fetching this variant…

Loading transformed asset…

* ### A searchable media library

  Create transcripts, summaries, and waveforms from the same recording.
* ### A podcast pipeline

  Normalize creator uploads before they reach every listener and device.
* ### A reusable audio layer

  Extract audio from video and route it into moderation or speech workflows.

[Explore Smart CDN](/services/content-delivery.md)[Talk to a media engineer](mailto:support@transloadit.com)

## Process uploads, batches, and cloud files with one workflow

Move this same capability into your product: process customer uploads and cloud files, then route the results to storage, webhooks, and delivery.

[Start building free](/c/signup/)[Explore the platform](/services.md)