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▣ AUDIO PROCESSING · FILE CONVERSION

MP3 to WAV Converter API

Hosted on ApyHub

What it does

The MP3 to WAV Converter API turns MP3 audio into WAV, the uncompressed format most editing tools, speech recognition systems, and audio analysis libraries expect. Upload an MP3 file (up to 100 MB) or send the URL of one hosted elsewhere, and choose how you want the result: the WAV file itself, returned directly in the response, or a signed link you can store or share.

Use it to prepare recordings for transcription, feed audio into analysis or machine learning pipelines, or deliver files to systems that only accept WAV. Pair it with the Speech to Text API to transcribe the result, or use the WAV to MP3 API to compress audio the other way.

Pick the endpoint that fits your setup: upload endpoints when the file is already in your app, URL endpoints when it lives in cloud storage or on another server. You can start on ApyHub's free tier with no card required.

▣ ENDPOINT 01 / 04
POST
MP3 to WAV Conversion
https://api.eu.apyhub.com/apyhub/mp3-to-wav-conversion/multi-part/download

QUICKSTART

GUIDE

Quickstart

Upload an MP3 file and get the converted WAV file back.

curl -X POST "https://api.eu.apyhub.com/apyhub/mp3-to-wav-conversion/multi-part/download?output=output" \
  -H "apy-token: $APY_TOKEN" \
  -F "file=@/path/to/audio.mp3"

What you'll get back

Returns a binary file response (string with format: binary), which is the converted WAV audio.

TRY ITLIVE · 100 ATOMS
Loading your default key…
The full key is used to call the gateway and stays in this tab — never sent to orbit or saved.
Max 100MB total per request (all files combined). Larger? Use this API's URL-based endpoint instead, if it has one.
body*
MP3 audio file (max 100 MB).

About this endpoint

What it does

Converts an uploaded MP3 file to WAV format and returns the converted file as a binary download.

Query Parameter(s)

AttributeTypeMandatoryDescription
outputStringNoQuery parameter with example value output.

Request Body

ParameterTypeMandatoryDescription
fileStringYesMP3 audio file (max 100 MB). Binary upload.

Response

Returns a binary file response containing the converted WAV output. The success response is a single binary payload, with no JSON wrapper or named fields in the output schema.

Query parameters

Name
Type
Description
outputOPTIONAL
string
—

Body

Name
Type
Description
bodyREQUIRED
object
—

Max 100MB total per request (all files combined). Larger? Use this API's URL-based endpoint instead, if it has one.

▣ ENDPOINT 02 / 04
POST
MP3 to WAV Conversion
https://api.eu.apyhub.com/apyhub/mp3-to-wav-conversion/multi-part/link

QUICKSTART

GUIDE

Quickstart

Upload an MP3 file and get back a WAV download URL.

curl -X POST "https://api.eu.apyhub.com/apyhub/mp3-to-wav-conversion/multi-part/link" \
  -H "apy-token: $APY_TOKEN" \
  -F "file=@/path/to/audio.mp3"

What you'll get back

Returns a JSON object with a data string field containing a URI for the converted WAV file.

{
  "data": "https://example.com/output.wav"
}
TRY ITLIVE · 100 ATOMS
Loading your default key…
The full key is used to call the gateway and stays in this tab — never sent to orbit or saved.
Max 100MB total per request (all files combined). Larger? Use this API's URL-based endpoint instead, if it has one.
body*
MP3 audio file (max 100 MB).

About this endpoint

What it does

Converts an uploaded MP3 audio file to WAV format using a multipart request. The response returns a JSON object with a data field containing a URI to the converted file.

Query Parameter(s)

AttributeTypeMandatoryDescription
outputStringNoOutput location or name for the generated result.

Request Body

ParameterTypeMandatoryDescription
fileStringYesMP3 audio file to convert. Binary upload. Max 100 MB.

Response

Returns a JSON object with a data string field formatted as a URI. This data value points to the converted WAV file.

ParameterTypeMandatoryDescription
dataStringNoURI of the converted file.

Query parameters

Name
Type
Description
outputOPTIONAL
string
—

Body

Name
Type
Description
bodyREQUIRED
object
—

Max 100MB total per request (all files combined). Larger? Use this API's URL-based endpoint instead, if it has one.

▣ ENDPOINT 03 / 04
POST
MP3 to WAV Conversion
https://api.eu.apyhub.com/apyhub/mp3-to-wav-conversion/url/download

QUICKSTART

GUIDE

Quickstart

Convert an MP3 from a public URL into WAV and download the resulting file.

curl -X POST "https://api.eu.apyhub.com/apyhub/mp3-to-wav-conversion/url/download?output=output" \
  -H "apy-token: $APY_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"url":"https://assets.apyhub.com/samples/sample.mp3"}'

What you'll get back

Returns binary file content (string with format: binary) — the converted WAV audio itself.

TRY ITLIVE · 100 ATOMS
Loading your default key…
The full key is used to call the gateway and stays in this tab — never sent to orbit or saved.
body*
Publicly accessible URL of the source audio file.

About this endpoint

What it does

Converts an audio file from a publicly accessible URL into WAV format and returns the generated file as binary output. The request body provides the source file URL, and the response is the converted WAV file.

Query Parameter(s)

AttributeTypeMandatoryDescription
outputStringNoOutput destination or mode.

Request Body

ParameterTypeMandatoryDescription
urlStringYesPublicly accessible URL of the source audio file. Must be a URI.

Response

Returns a binary response containing the converted WAV file.

Query parameters

Name
Type
Description
outputOPTIONAL
string
—

Body

Name
Type
Description
bodyREQUIRED
object
—
▣ ENDPOINT 04 / 04
POST
MP3 to WAV Conversion
https://api.eu.apyhub.com/apyhub/mp3-to-wav-conversion/url/link

QUICKSTART

GUIDE

Quickstart

Convert an MP3 from a public URL to WAV by sending the source file URL in the request body.

curl -X POST "https://api.eu.apyhub.com/apyhub/mp3-to-wav-conversion/url/link?output=output" \
  -H "apy-token: $APY_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"url":"https://assets.apyhub.com/samples/sample.mp3"}'

What you'll get back

Returns a JSON object with a data string field containing the URI of the converted WAV file.

{
  "data": "https://..."
}
TRY ITLIVE · 100 ATOMS
Loading your default key…
The full key is used to call the gateway and stays in this tab — never sent to orbit or saved.
body*
Publicly accessible URL of the source audio file.

About this endpoint

What it does

Converts an audio file available at a URL into a WAV file. You send the source file URL in the request body, and the response returns a JSON object with a data field containing a URI.

Query Parameter(s)

AttributeTypeMandatoryDescription
outputStringNoOutput name/path for the converted file.

Request Body

ParameterTypeMandatoryDescription
urlStringYesPublicly accessible URL of the source audio file. Must be a URI.

Response

Returns a JSON object with a data string field formatted as a URI.

ParameterTypeMandatoryDescription
dataStringNoURI of the converted WAV file.

Query parameters

Name
Type
Description
outputOPTIONAL
string
—

Body

Name
Type
Description
bodyREQUIRED
object
—
▣ COMMON ERRORS

Errors any endpoint can return

400bad_request

Required parameter missing or malformed body.

401unauthorized

API key missing, revoked, or not authorized for this service.

429rate_limited

Your plan's per-second rate exceeded. Retry with exponential backoff.

503upstream_busy

Backend temporarily unavailable. Try again in a few seconds.

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