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

# Convert WAV to MP3 online

Convert WAV audio to a smaller, widely supported MP3 file.

## Try it with your file

Drop a WAV file here

Drop a WAV file here

or choose a file from your device

WAV 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 your WAV

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

### Let Transloadit process it

Run “Convert to MP3” on Transloadit’s distributed processing platform and watch its progress.
3\. Step 3

### Use the finished result

Inspect and download the result (MP3 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)
* [MP3 to WAV](/tools/mp3-to-wav.md)

[View all tools](/tools.md)

Good to know

## Frequently asked questions

How does the WAV to MP3 tool work?

Upload a supported file (WAV), run the tool, and download the result (MP3 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 WAV to MP3 with an API?

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

What other file tools are available?

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

Make audio useful everywhere

## Automate “WAV to MP3” 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

## Serve MP3 audio only when a screen requests it

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…Ready at the edge

* ### 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)