SongToolbox AI Song Extender

At a glance

• Editor score
  7.6 / 10
• Pricing
  Free plan
• Best for
  Short, clearly bounded free extensions
• Free plan
  Yes
• Paid from
  $9/mo
• Section inpainting
  No
• Facts checked
  26 Sep 2026

• Where it wins

  • Accepts MP3, WAV, M4A, OGG, and FLAC source audio
  • Offers 30-second, one-minute, and two-minute target lengths
  • Free plan allows two daily extensions without an account

• Where it doesn't

  • Extended tracks are available as MP3, not WAV
  • No stem export or section inpainting
  • The model determines the exact ending length

Our verdict on SongToolbox AI Song Extender

SongToolbox AI Song Extender is a web-based tool for creating a continuation from uploaded audio. It suits solo creators and small teams who want to extend a track with a chosen direction and a bounded target length, rather than edit individual sections or export separated stems. Source files can be MP3, WAV, M4A, OGG, or FLAC, up to 25 MB and eight minutes long. Users can add a text direction, preview the result in an in-page player, and download the extended track as an MP3.

Length controls make the tool’s scope clear: the available targets are 30 seconds, one minute, or two minutes. The two-minute choice is a target, not a guaranteed duration; the model determines the exact ending length. That distinction matters when an extension needs to meet a precise runtime. SongToolbox focuses on continuing an uploaded track, with a style reference indicated among its category capabilities, rather than section inpainting or stem-level work. It is a better fit for a straightforward continuation than for detailed arrangement or export workflows.

The Free plan provides two extensions per day without requiring an account. Pro costs $9 per month and adds unlimited extensions, priority processing, early access to new AI tools, and cancellation anytime. The feature page specifies MP3 for the generated result, so buyers needing WAV export or stems should look elsewhere. Choose SongToolbox for occasional guided extensions, or Pro when the daily cap is too restrictive; skip it if exact duration or more advanced audio deliverables are central to the job.

Your product? Our editors can test SongToolbox AI Song Extender in depth and publish a review, labelled as paid · from $149/mo →

SongToolbox AI Song Extender pricing

All 2 SongToolbox AI Song Extender plans and prices →

SongToolbox AI Song Extender fact sheet

Alternatives to SongToolbox AI Song Extender

• SunoA song-generation and editing suite with extension tools, stems, and a browser-based studio.9.4
• MusicWave.aiA broad web-based AI music toolkit with free access and paid commercial-use tiers.9.1
• UdioA flexible AI song editor with Sessions timeline tools, but short tracks and disabled downloads.9.0

See all SongToolbox AI Song Extender alternatives →

Featured on iTechGuides

SongToolbox AI Song Extender is listed in our AI Song Extenders directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update