Every line,
right on time.

Lyricron's desktop editor mid-annotation, with the Annotate button active for the next line

Play a track, tap along, and export a ready-to-use LRC file. Lyricron times your lyrics to the millisecond while you listen, no account, no upload, nothing ever leaves your device.

Launch app See how it works

Workflow

Four steps, one pass through the song

No re-recording, no separate timing app. You time the lyrics by listening once.

Step 01

Drop a track

Drag an MP3 or video file anywhere on the page, or pick one from disk.

Lyricron's upload screen on mobile, with a dropzone for an audio or video file

Step 02

Add the lyrics

Type them by hand, import an existing .lrc or .txt file, or search LRCLIB for synced or plain lyrics.

The three ways to add lyrics: enter manually, search LRCLIB, or import a file

LRCLIB search results showing a matched track with duration and sync status

Step 03

Tap to annotate

Press play, and hit Annotate the instant each line starts. The button lights up the moment you're allowed to. On desktop or mobile, it works the same way.

Mobile editor mid-annotation, with the Annotate button active for the next line

Step 04

Preview, then export

Watch the finished sync playback with the active line highlighted in real time, then copy or download a ready-to-use .lrc file.

Mobile preview mode showing every line annotated and ready to export

Prefer the keyboard?

Every action has a shortcut

Play/pause, annotate, undo, seek, and nudge timestamps, all without touching the mouse. Open the shortcuts reference any time from the keyboard icon in the nav.

Keyboard shortcuts reference open on mobile

Built for the job

Everything you need to time a song, nothing you don't

Drag-and-drop import

Drop audio or video anywhere on the page, or use the file picker. Video plays as audio only.

Keyboard-first annotating

Play, annotate, undo, redo, and seek without leaving the keyboard, with ±50ms nudging.

LRCLIB search

Look up a track and pull in already-synced lyrics instead of typing from scratch.

Full undo history

Every timestamp edit, shift, and clear is undoable. Experiment freely while you time a song.

Live preview

Watch the active line highlight in real time as playback moves through your timed lyrics.

Copy or export .lrc

Copy plain or timed lyrics to the clipboard, or download a ready-to-use .lrc file.

The editor

One editor, one exported file

Plain lyrics on the left, timed lyrics on the right: this is what produced the file below.

The desktop editor with plain lyrics on the left and fully timed lyrics on the right

right-on-time.lrc

[00:08.00] 불빛 아래 (Under the lights)
[00:23.00] We're chasing the night, chasing the night
[00:38.00] louder than sound, 심장이 뛰어
[00:53.00] every step, 그대로 느껴져

Plain text in, plain text out

Standard LRC, nothing proprietary

Lyricron writes the same .lrc format every karaoke and lyrics app already reads. Open it anywhere, edit it by hand, or drop it straight back in to keep refining the timing.

Millisecond-precision timestamps on every line
Copy to clipboard or download the file directly
Re-import your own .lrc to pick up where you left off

Get started

Run it locally in under a minute

Lyricron is a local web app. Clone it, install, and it opens in your browser.

npm ci
npm run dev

Open the app View on GitHub

Support

Enjoy Lyricron?

Lyricron is free, private, and open source. If it saves you time, buy me a coffee to support ongoing development.

Buy me a coffee

Every line,right on time.