MouthFL

Stop Motion Lip Sync
Made Easy.

A Mac app that let’s you upload your dialogue, analyze every word, and automatically map mouth shapes to an export ready X-Sheet, perfect for Dragonframe or your animation workflow.

Get MouthFL → See how it works

macOS 12+ · Works fully offline · No subscription

MouthFL app window showing workspace with X-Sheet and mouth shape preview
Up To 4 Characters Simultaneously
100% offline after setup
WAV · MP3 · M4A audio support
No Subscription Required

How it works

Audio in. X-sheet out.

Three steps from raw dialogue to a frame-perfect X-Sheet, eliminating the time and tedium between dialogue recording and animating.

STEP 01
Upload your audio
Drag in a WAV, MP3, or M4A file for each character speaking. Load up to four characters simultaneously.
→
STEP 02
MouthFL analyzes
MouthFL analyzes and transcribes every word. Each phoneme is mapped to one of 13 built-in mouth shapes, frame by frame.
→
STEP 03
Export your X-sheet
Save a CSV X-sheet to be imported into your DragonFrame project or used alongside your existing stop motion animation workflow.

Features

Everything a Lip Sync Requires.. and more

Accurate Transcription
Word for word accuracy with syllable-level timing allows for precise mapping of phonemes. Everything is bundled directly in the app. No cloud connection needed. Your dialogue stays private, on your machine.
100% OFFLINE
Built In Mouth Shapes
13 built-in mouth shapes coded from M_01 to M_13 using standard phonemes so your dialogue looks right.
Everything You Need Included
4-Character Support
Load separate audio files for up to four characters. Analyze them all at once, preview each character's lip sync separately or all together.
MULTI-CHARACTER
Manual Editing Capabilities
Easily edit single frames, frame runs or offset all frames forward or backward to perfect your dialogue scenes before you animate.
FRAME-LEVEL CONTROL
Custom Shape Packs
Import your own mouth shape artwork to get a better idea of how your final animation will look.
YOUR ARTWORK
X-Sheet CSV Export
Export a complete exposure sheet as a CSV. Open in DragonFrame, Excel, or any spreadsheet app or print and you're ready to animate.
CSV EXPORT

Get MouthFL

Pay what it's worth to you.

Pay-what-you-want · one-time · yours forever. Minimum $10.