AI Song Extender — Lengthen Any Track Online
Use the AI song extender to lengthen any audio track with seamless transitions. Choose where your music continues, write new lyrics if needed, and let the model match the original key and voice in minutes.
Hot templates
Examples to start from
Nothing here yet. Your generations show up on this side.
Extended Song Preview
Upload a song and choose where to continue it; the longer version appears here
Examples
Harbor Lights1:48 → 3:12
Copper Fox2:05 → 3:40
Night Shift1:30 → 2:45
Hear How the AI Song Extender Works
Compare the original track and its extension: tempo, key, and vocal timbre carry over seamlessly.
Second Verse and Outro Continuation
An indie pop clip continued past its first chorus, adding a full verse and final chorus in the exact same vocal tone and key.
Original Track
Extended
What Is an AI Song Extender?
An AI song extender continues an audio track past any timestamp you choose. It analyzes the tempo, key, instrumentation, and vocals of your source file to generate fresh sections that fit naturally without jarring cuts.
Use this online tool to turn a short idea into a full arrangement or extend an MP3 for background music. You can run an AI song extender with lyrics to add new verses, or leave prompt fields blank for pure instrumental extensions.
Why Use This AI Song Extender?
Seamless Transitions
The continuation preserves your original BPM, musical key, and sound texture so playback stays cohesive.
Custom Continuation Point
Extend from the final second or pick any point on the timeline to rewrite an ending or add a bridge.
Lyrics or Instrumental
Supply custom verses and choruses to guide vocal parts, or keep the generation purely instrumental.
Consistent Vocal Style
Vocal timbre and phrasing carry straight into the new section, preserving the feel of one continuous take.
Two Generated Variations
Every run delivers two distinct extension variations so you can compare and pick the best take.
Instant Audio Export
Download the extended MP3 ready for DAW editing, streaming playlists, or video production.
How to Extend a Song Online
Three simple steps to generate a longer track with AI.
1. 1. Select Your Track
Upload an audio file or select an existing track from your AI Song project library.
2. 2. Set the Extension Point
Select the second where the new section starts, then add custom lyrics or style prompts if needed.
3. 3. Generate and Download
Review both generated takes in minutes, pick your favourite extension, and download the finished file.
Who Uses an AI Music Extender?
Video Creators & Editors
Lengthen background music to match full video edits, social reels, or an AI music video maker timeline.
Songwriters & Producers
Expand a short demo by adding a bridge or extra chorus to test arrangements before studio recording.
AI Music Creators
Transform a quick short generated snippet into a full-length, finished production.
Podcasters & Streamers
Lengthen intro themes and outro stings to cover full episode monologues without hard loops.
Game Developers
Produce evolving background audio for game menus and gameplay scenes without repetitive audio fatigue.
Event Planners
Elongate walk-in cues and ceremony tracks to fit the exact timing of live entrances.
AI Song Extender FAQ
Which audio files work with this AI song extender?
Songs you own or created on AI Song work seamlessly. You can upload MP3, WAV, OGG, or M4A audio files directly into the AI song extender, or select an existing project from your library. The tool preserves your source audio quality across every extension.
Can I set the exact timestamp where the song extends?
Yes. You can set the exact starting second on the track timeline. Your original song plays naturally up to that chosen point, and the AI song extender generates a smooth continuation from there without awkward cuts or sudden tempo changes.
Can I use the AI song extender with lyrics or keep it instrumental?
You can do either. Leave the lyrics field blank to extend instrumental melodies, or paste custom lyrics if you want vocals in the new section. The AI song extender adapts to both approaches, keeping vocal styling consistent with the original track.
How does the AI music extender match the original key and tempo?
The AI song extender analyzes the underlying key, tempo, and instrumentation of your source audio. It builds a natural progression that matches the original groove and sonic palette, ensuring the new passage feels like a deliberate part of the track rather than a repetitive loop.
How long does the AI song extender take to generate audio?
Most extensions are ready in two to four minutes. Each request generates two distinct extended versions so you can compare the continuations, choose the variation that best fits your project, or pair it with our AI music video maker.
What does it cost to extend a song?
The required credit cost is clearly displayed on the Extend button before you begin, matching the standard cost of generating a new song on AI Song. You can review the total before confirming, ensuring transparent pricing with no hidden charges.
Make Any Track Longer with Our AI Song Extender
Upload an audio track, pick your extension point, and generate fresh sections in minutes.