An AI song generator from lyrics takes words you wrote (a poem, a toast, a song that never had music) and sings them to a melody it composes in the style you describe. Any AI music generator that works from lyrics needs two inputs: the lyric sheet and a separate line about the sound. In Toybox AI, that's Music Generator, which has a Lyrics box for your words and returns two versions per run. Below is how to format lyrics so they get sung the way you hear them.
What you can make from your own lyrics
These are the jobs where starting from your own words matters most:
- A poem set to music. A poem you wrote for a partner or a parent, turned into a slow acoustic song. Most poems need a repeating chorus added first (see the section on making lines fit).
- A song you wrote years ago. Lyrics in a notebook with no melody. Try the same words in two genres to hear which one fits.
- A songwriting demo. Hear a draft sung before you take it to a band or a producer, and fix the lines that don't land.
- A learning song for kids. Times tables, the planets or the steps of handwashing, in a bouncy tune a class can repeat.
- A toast or speech as a song. The best lines from a wedding or retirement toast, trimmed into verses. For occasion ideas, see custom AI songs about someone.
- A theme with words for a show or channel. A four-line sung intro for a podcast or a YouTube series.
When you make a song with AI from your own lyrics, the generator decides the melody, and your line lengths and repeats decide how singable it is.
How to format lyrics for an AI song generator
Write the lyrics as a plain lyric sheet: section labels in square brackets, one sung line per line of text, and a blank line between sections. Google's tips for the Gemini app describe the same kind of markup, with lyrics you've written labeled by tags like [Verse 1], and Music Generator's Lyrics box shows [Verse 1] and [Chorus] in its example text.
- Label every part. [Intro], [Verse 1], [Pre-Chorus], [Chorus], [Verse 2], [Bridge], [Outro]. The labels tell the singer where the song changes.
- Write the chorus out in full every time. Don't write "(repeat chorus)". Paste all four lines again where it comes back.
- Keep verses to four lines, or six at most, and give every verse the same number of lines so they fit the same stretch of melody.
- Keep only words you want sung. Put notes such as "slow down here" or "guitar solo" in the style description, not in the lyric sheet.
- Spell out numbers and abbreviations. Write "twenty-five" and "Doctor Lee", so there's no doubt how they should be sung.
A complete lyric sheet in this format, ready for the Lyrics box:
[Verse 1]
The porch light's on at Maple Street
The screen door still sticks in June
Dad's radio plays the ballgame low
Mom hums along out of tune
[Pre-Chorus]
I've been gone a long, long time
But the road still knows the way
[Chorus]
Leave the porch light on
I'm coming home tonight
Past the grain mill and the water tower
Leave the porch light on
[Verse 2]
The oak we climbed has lost a limb
The creek is lower than before
But Mom still keeps my name in chalk
On the frame of the kitchen door
[Chorus]
Leave the porch light on
I'm coming home tonight
Past the grain mill and the water tower
Leave the porch light on
[Bridge]
Every city light I've seen
Couldn't hold a candle to this one
[Chorus]
Leave the porch light on
I'm coming home tonight
Past the grain mill and the water tower
Leave the porch light onMake your lines fit a tune
A line fits a tune when it can be sung in one breath, at the same pace as the lines around it. The quickest check is to count syllables and clap them.
| Part | Lines | Syllables per line | Why |
|---|---|---|---|
| Verse | 4 | 7 to 10 | Room for the story without rushing |
| Pre-chorus | 2 | 6 to 9 | Builds toward the chorus |
| Chorus | 4 | 5 to 8 | Short lines are easier to sing along to and remember |
| Bridge | 2 to 4 | Any, but different from the verse | A change of pace before the last chorus |
Match the lines in each pair. If line 1 has 8 syllables, keep line 2 near 8 too. A 6-syllable line next to a 14-syllable one forces the singer to cram.
Rewrite long lines, don't just trim them. "I remember all the times that we would drive down to the lake in your old car" has 19 syllables. "Your old car, the lake road, summer's end" says the same thing in 9.
Rhyme the ends of lines 2 and 4. In a four-line verse, that gives the ear a pattern without forcing a rhyme into every line, the way the porch light verse pairs "June" with "tune".
Put the title in the chorus. The phrase the song is named after should be the first or last line of the chorus, so the song and its name match.
Read it out loud at walking pace. Anywhere you stumble, the singer will too. Swap a hard word for a plain one.
Write the style line separately
The lyrics say what is sung, and "Describe your song" says how it sounds. Keep them apart, so the style doesn't get sung and the lyrics don't get treated as instructions. A useful style line covers four things: genre or era, tempo, a couple of instruments, and the singer.
| If your lyrics are | Try this in "Describe your song" |
|---|---|
| A love poem | Slow acoustic ballad, fingerpicked guitar, soft cello, intimate female vocals |
| A homesick story | Mid-tempo Americana, pedal steel, brushed drums, warm male vocals |
| A kids' learning song | Bouncy kids' pop, ukulele, handclaps, bright and simple melody |
| An angry breakup | Fast pop punk, distorted guitars, driving drums, shouted chorus |
| A worship or reflection piece | Gentle piano ballad, strings, soft choir harmonies, slow |
| A spoken-word piece | Lo-fi hip-hop beat, dusty drums, mellow keys, rhythmic spoken vocals |
Skip real singers' and bands' names. "Raspy male vocals, 70s rock" describes the sound without borrowing anyone's identity.
Draft or polish lyrics with AI Writer
If you have a poem, notes or a half-finished song, AI Writer can reshape it into a lyric sheet before you make the music. AI Writer is a song lyrics generator for the words, and Music Generator adds the melody and vocals. Put the brief in the "What should we write?" box (2,000 characters at most), leave Type on "Anything", set Length to "Medium" or "Long" for a full song with a bridge, and press "Write it". It currently costs 5 credits.
A brief that gives it enough to work with: "Turn my poem below into song lyrics with [Verse 1], [Chorus], [Verse 2], [Chorus], [Bridge] and [Chorus] labels. Keep my images of the porch light and the kitchen door. Make every verse line 7 to 9 syllables and the chorus lines 5 to 7. The chorus should start with 'Leave the porch light on'. Poem: (paste it here)."
AI Writer returns plain text, so check that the square-bracket labels are there and fill in the missing ones before you paste the lyrics into Music Generator.
Who owns a song made from your lyrics
A recorded song is two separate works under US copyright: the musical composition (the melody and the lyrics) and the sound recording (the performance), according to the Copyright Office's Circular 56A. When AI writes the melody and sings it, only your part may be protected. This is general information, not legal advice.
- Your lyrics are protected as your work. Copyright exists automatically once an original work is written down or otherwise fixed, per Circular 1.
- The AI's melody and performance may not be. The Copyright Office's January 2025 report says a person has to decide enough of the expressive content for AI output to be protected, and typing prompts isn't enough. Your lyrics are different: when a human-written work shows up in the output, that part can be protected.
- Registering takes a disclosure. The Office's registration guidance says applicants must disclose AI-generated content and exclude any that is more than a small amount from the claim.
- Check the tool's terms. The ownership line in Toybox's Terms of Service says the outputs you generate are yours, subject to the Terms, and its list reads images, text, video and code. The Terms don't mention songs or the lyrics you type, so read the Terms before a release.
Uploading it to YouTube brings its own checklist, from the AI use setting to Content ID claims, in the guide to posting AI music on YouTube.
Limits to know
- Pro plan only. Each run of Music Generator currently uses 95 credits and requires Pro or higher, which currently comes with 1,000 credits a month for $9.99 (see Toybox's plans).
- You can't give it a melody. Nothing you sing or play can be uploaded, so the tune is always composed for you. If the melody matters, record a rough version yourself and use the AI song as a reference for arrangement ideas.
- No length setting. To shorten a song, cut a verse from the lyric sheet, or shorten the file in an audio editor.
- Words can be changed or dropped. Check every line against your sheet, and write a misread name phonetically for the next run.
- Other languages aren't promised. The site is in English and there's no language setting. If your lyrics are in another language, run a short test verse first.
For a wider look at what AI music tools can and can't do, including ChatGPT and Gemini, read whether AI can make a song for you.
How to turn your lyrics into a song in Music Generator
Have three things ready: a Pro plan, a tagged lyric sheet, and one style line.
- In Music Generator, use the chorus hook as the "Song title" (up to 80 characters).
- Paste your style line into "Describe your song" (up to 1,000 characters).
- Paste the whole lyric sheet, tags included, into "Lyrics", which holds 5,000 characters.
- Under "More options", set the singer with "Voice", move the "How closely to follow your description" slider right to hold the genre, and type unwanted sounds ("autotune, synths") into "Sounds to leave out".
- Hit "Create song". Both versions are ready in a few minutes, and if the run fails, you get the credits back.
- Play both versions with your lyric sheet open, pick the one that sings every line, and download that MP3 or save it to your Toybox gallery.