How Croonify Turns a Song into a Karaoke Video

Croonify creates a synchronized karaoke video from a song you already have. You supply three things in order — a song file that contains vocals, the title and artist, and the full lyrics — and the AI aligns the lyrics to the singing, producing a karaoke video you can use at parties or events. The one hard requirement is that the recording must contain someone singing; without vocals, there is nothing for the lyrics to synchronize to.

The Three Inputs Croonify Asks For

The workflow is built around three steps, shown in order on the site.

1. Select Song File

You upload the audio or video file you want turned into karaoke. Supported formats include .mp3, .m4a, and .mp4, among others. The site labels this field Vocals Required — the recording must have singing in it.

2. Add Title & Artist

You enter the song's title and the artist's name. There is also a search link to AZLyrics, which is useful for pulling up the correct lyrics text.

3. Paste Lyrics

You paste the lyrics into the field. The site warns: Do NOT forget lyrics that repeat. If a chorus appears three times in the song, the repeated lines need to be present in the text you paste, or the synchronization will not line up with what is actually sung.

What Happens After You Submit

Once the song file, title/artist, and lyrics are in place, Croonify's AI uses the vocal track and the lyrics to synchronize the words to the singing, then generates the karaoke video. The site describes the result as a synchronized karaoke video delivered in minutes.

The Most Common Failure: No Vocals in the File

If you upload an instrumental, a backing track, or a recording where nobody is singing, Croonify will detect it and stop you. The site shows this message:

"This recording does not appear to have anyone singing in it. There MUST be singing for the lyrics to synchronize. It will NOT do what you want otherwise."

You are then asked whether you want to choose another recording. This is the single most important condition to check before starting: the source file must contain vocals. A karaoke version of a song — the very thing you are trying to make — will not work as an input, because the vocals have already been removed.

Practical Notes Before You Start

• Get a vocal recording, not an instrumental. The site's own tip points to the iTunes Music store as a good source for downloading DRM-free licensed music, i.e. the original sung track.
• Paste complete lyrics, including every repeated section. Missing repeats are a common reason synchronization looks wrong.
• Have the title and artist ready. You can look them up via the AZLyrics search if you don't have the exact spelling.
• Expect a short turnaround. The site frames the output as arriving in minutes rather than requiring manual editing.

Who This Is For

Croonify fits the case where no karaoke version of a song exists and you want one anyway — the site's own framing is "Can't find the karaoke version of a song? Make one!" It is aimed at parties and events where you need a synchronized lyrics video from a song you already own or have licensed. It is not a tool for separating vocals from an instrumental, and it will not proceed if the input has no singing.