FormatOwl.
Credits & pricing

Convert audio

Batch convert MP3, WAV, AAC, M4A, FLAC and OGG audio. Choose output format, bitrate, sample rate and channels, then listen and download.

01

Upload

Drop your files here

MP3 · WAV · AAC · M4A · FLAC · OGG

Up to 20 files per batch · 1.0 GB per file

02

Settings

Choose a format to get started. Use advanced conversion to fine-tune the output.

AAC uses ADTS; M4A contains AAC. WAV and FLAC can be larger. Listening previews are separate from your downloads.

Estimated cost: Choose a file to estimateRemaining —
Indicative estimate · Full price unverified

Based on size, duration, pixels, pages and settings. Batches show a total. ≈ is indicative; + means only part of the cost is included. The server quote after analysis takes precedence.

Resource budgets are not verified prices. Confirm a maximum before paid processing; unused reservations are returned.

View credits and billing rules

Private files. Automatically deleted after 24 hours, or delete them whenever you like.

Formats and limits

Input
MP3 · WAV · AAC · M4A · FLAC · OGG
Output
MP3 · WAV · AAC · M4A · FLAC · OGG (Opus)

Up to 1 GiB per file and 20 files per batch. Conversion output is limited to 4 GiB per file.

How to use this tool

  1. Choose up to 20 supported files. Every file in the batch uses the same settings.
  2. Adjust the settings and start processing. Keep the page open until uploading finishes.
  3. Preview the results, download individual files, or create a ZIP of successful results.

Settings and results

MP3 at 192 kbps is the default. WAV and FLAC offer lossless output encoding; OGG output uses Opus. Valid bitrate and sample-rate combinations depend on the selected format.

File storage and deletion

Files are uploaded and processed on the server. Originals and results are stored privately and accessed through their account or browser session; downloads use short-lived links. By default, files expire 24 hours after upload and are removed by the cleanup process. You can delete them earlier in your workspace. The current local default allowance is 20 uploaded files per 24 hours.

Read the usage and data guide

Common questions

Will converting MP3 to FLAC improve the sound?

No. Lossless output does not recover information already lost in the source. Choose it for editing or compatibility, not as an audio restoration method.

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