If you've ever tried to make your own karaoke track, you already know the hard part isn't the video—it’s the timing. A good karaoke track needs lyrics that appear at the right time, line by line (and ideally word by word), so the singer can follow naturally without thinking about it.

Croonify includes a lyrics synchronization system that automatically aligns your lyrics to a normal song recording. It then provides an easy timing editor so you can correct edge cases and make the timing feel “human.”

This is not a lyric “template” or a hand-timed project from scratch. The goal is to get you extremely close automatically, and then give you practical tools to finish the last few percent quickly.

Croonify uses your provided lyrics and a vocal-focused analysis of the audio to estimate where each phrase is sung. In other words: it listens for speech-like and syllable-like structure in the recorded vocals and maps that structure onto your lyric text.

That mapping is why Croonify requires a normal version of the song that includes vocals. A karaoke/instrumental track usually cannot be synchronized because it does not contain the vocal content that anchors the lyrics in time.

The better the lyrics match what is actually sung, the easier the job becomes. When the lyric text differs from the vocal performance (ad-libs, extra “oh” sounds, repeated refrains that the lyrics omit, etc.), the sync can drift and you may need to adjust it using the editor.

Croonify’s timing editor is designed to be fast and forgiving. The intent is that you should be able to:

• Fix a line that comes in a little early or late
• Split or merge lines where the phrasing is different than expected
• Correct repeated refrains that a lyrics provider only listed once
• Adjust tricky parts like choral sections, harmonies, and spoken phrases

You’re not locked into a single “perfect” attempt either. Croonify grants limited regenerations of the video after lyric edits, which is useful for fine tuning the timing and presentation.

Most karaoke tools focus on one thing (often just vocal removal). Croonify is built around the full end result: an on-screen karaoke video that is easy to generate and easy to refine.

• No subscriptions and no ongoing commitments
• Regular free access with no feature restrictions
• Easy to use lyric timing editor for corrections
• Supports multiple voices simultaneously in customizable screen layouts
• Independent main and background vocal separation
• 1080p rendering
• Small file sizes (typically under 10MB)
• Tools to add a background image or video

Use a song file that contains vocals

Croonify synchronizes lyrics by analyzing the recorded voice. If you upload a karaoke track that already removed the singing, Croonify won’t have the information it needs to place lyrics correctly.

Provide lyrics exactly as you want them to appear

Remove annotations, ads, and section labels. If the singer repeats a refrain multiple times, the refrain should appear multiple times in your lyric text. Croonify will attempt to align every word, so missing or extra words can shift the timing.

Expect harder songs to need minor edits

Choral songs, dense harmonies, heavy reverb, and loud background vocals can confuse any synchronization system. Croonify can handle a lot, but the timing editor exists because there will always be edge cases.

Higher quality audio helps

Lower bitrates and aggressive compression can smear or mask the vocal information that synchronization relies on. Most commercially available audio files are fine, but if you have options, choose higher bitrate sources.

Do I have to time the lyrics manually?

No. Croonify generates timing automatically. The editor is for corrections and fine tuning, not for starting from scratch.

Why do you need the version with vocals?

Because Croonify uses the recorded singing to locate where syllables occur in time. Instrumental-only files usually cannot be synchronized reliably.

My lyrics drift out of sync later in the song—why?

Usually this happens when the lyric text differs from the performance (missing repeats, extra words, or ad-lib phrases). Fixing the lyric text and regenerating often resolves the drift.

Does Croonify support languages other than English?

Yes, Croonify works with many languages and character sets. However, languages differ in how well generic phonetic mapping captures sung pronunciation. If a language performs poorly, use the Support link and I’ll look into improving it.

What does Croonify output?

Croonify outputs a karaoke video file with lyrics on screen. It is designed to be a small, practical file size for sharing, while still supporting 1080p rendering.

If you already have a song file and lyrics, you can generate a synchronized karaoke video in minutes.

Make a karaoke video with Croonify

If you’re searching for something more specific, these pages might help:

For an overview of everything Croonify provides, see the full Croonify tools list.

AI Karaoke Maker

A focused overview of Croonify as an AI-driven karaoke creation tool.

Karaoke Maker

The general “karaoke maker” page if you’re comparing tools.

Online Karaoke Maker

Use Croonify directly in your browser with no subscription or setup.

Karaoke Video Generator

Details on generating video output (not just instrumental audio).

Lyrics Sync

How lyric synchronization works and why accurate lyrics matter.

Make Karaoke from Any Song

A practical workflow-focused page for turning a normal recording into karaoke.

Karaoke Lyrics Editor

More detail on refining timing and editing lyrics after generation.

Multiple Voices Karaoke

Multi-voice support and customizable layouts.

Duet Karaoke

A duet-focused page if you’re creating two-part karaoke videos.

Karaoke Background Video

How to add a background image or video.

Remove Vocals Online

Vocal removal explained (and why karaoke tracks don’t work as inputs).

Vocal Remover for Karaoke

Remove vocals specifically for karaoke-style lyric videos.

Lyrics Video Maker

Create lyric videos with timing and karaoke-style display.

Karaoke App

Why Croonify works well on desktop and mobile as a web app.