Original16:9
0:00 / 0:00
Lip-Synced16:9
0:00 / 0:00
UGC Ad Variation
Dubbing text: Good morning! Look at this face cream I've been using lately, it's really great.
Add new voice to an existing video
AI Lip Sync
Upload a video and add your own audio—or enter a script and choose an AI voice. WebDubbing synchronizes the speaker's visible lip movements to the new dialogue.
Keep the visual performance you want and add the final voice without generating the shot again.
- Secure uploads with account-based task tracking
- Generated media expires automatically after 7 days
- Failed tasks refunded automatically
Create Your Lip-Synced Video
Preview
16:9Preview
Example workflows
Add New Voice to Existing Videos
Use a finished voice track or a new script to give an existing performance accurate, synchronized dialogue.
Original16:9
0:00 / 0:00
Lip-Synced16:9
0:00 / 0:00
Live Stream Message
Dubbing text: To be honest, I'm very satisfied with today's live stream, and I thank everyone for watching and supporting me. Let's keep going!
Original3:4
0:00 / 0:00
Lip-Synced3:4
0:00 / 0:00
Animated Character Dialogue
Dubbing text: We leave at sunrise. Keep the map close.
When lip sync is useful
Keep the Performance. Replace the Speech.
Use AI lip sync when the shot is worth keeping but the final dialogue comes from a different recording, script, or production stage.
Campaign variation workflow
One Restaurant Visit, Three Ad Hooks
Turn one finished restaurant visit into multiple ad versions without changing the location footage or filming the experience again.
Original9:16
0:00 / 0:00
Hook 19:16
0:00 / 0:00
Hook 29:16
0:00 / 0:00
Hook 39:16
0:00 / 0:00
What changes: Only the opening advertising hook and voiceover change. The restaurant footage, presenter performance, and visit sequence remain the same.
AI video
Add Final Dialogue to an AI-Generated Video
Keep a generated shot you like and add accurate speech after the character, action, and camera movement are already approved.
- Start with
- Generated video plus final audio or script
- Create
- The same source shot with synchronized dialogue
Voice track
Sync a Separately Recorded Voice
Use a cleaner voice take, actor delivery, or externally generated voice track without rebuilding the visual performance.
- Start with
- Existing video plus uploaded or recorded audio
- Create
- Visible mouth movement matched to the final voice
Correction
Replace a Line Without Reshooting
Correct a date, name, offer, or spoken mistake while keeping the original framing and on-camera performance as the source.
- Start with
- Recorded take plus corrected dialogue
- Create
- An updated clip ready for review
New version
Reuse One Visual Take With a New Script
Create another approved message, character line, or campaign version from an existing performance.
- Start with
- Reusable video take plus new text or audio
- Create
- A new dialogue version of the source video
Choose the right source
Which Videos Produce the Best Lip Sync Results?
A clear speaker, visible mouth, stable shot, and well-matched dialogue give the model the strongest starting point.
Recommended Input
Clear face, visible mouth, stable shot
- One main person speaking
- Face is large and in focus
- Front-facing or slight side angle
- Mouth remains unobstructed
- Stable camera and lighting
- Few camera cuts
- Speaker stays inside the frame
- Speech length is close to the clip
Difficult Input
Small face, covered mouth, rapid movement
- Several people speaking together
- Mouth covered by a hand or object
- Extreme side profile
- Small or out-of-focus face
- Fast head turns
- Strong motion blur
- Frequent camera cuts
- Highly stylized or non-human mouth
Three steps
From Existing Video to Final Dialogue
Bring the visual performance and final speech together in one browser workflow.
- 01
Upload a Video
Choose an MP4 or MOV with one clearly visible main speaker.
- 02
Add the Final Speech
Upload your finished audio, record a voice take, or enter text and choose an AI voice.
- 03
Generate and Review
Create the lip-synced result, review it in My Creations, and download it within seven days.
Simple per-second pricing
Know Your Maximum Cost Before You Generate
The generate button shows the credits reserved from the source video length. Your final charge is settled after the output duration is measured.
Upload Audio
3/s
Text to Speech
4/s
Try up to 15 seconds
Free accounts can generate source videos up to 15 seconds.
Unlock up to 10 minutes
Accounts with purchased credits or an active plan can generate source videos up to 600 seconds.
Failed tasks are refunded
If generation is confirmed as failed, the reserved credits are automatically returned.
Choose how you want to create
Start with one-time credits, or save more with monthly and annual plans.
Get the lowest credit cost with a full-year plan.
Save 65%
Starter
$7/ month
$19.90 / month
Billed $84 annually | Save $34.80 a year
Pay once for the year and get all credits upfront.
Includes
- 600 credits / month equivalent
- 7,200 credits upfront
- Up to 17m 8s with 1.0 or 8m 34s with 2.0
- WebDubbing 2.0
- Watermark-free exports
- Credits valid for 365 days
- Cancel anytime
Save 67%
Creator
Best Value$27/ month
$81.67 / month
Billed $324 annually | Save $144 a year
The strongest annual value for regular creators.
Includes
- 2,500 credits / month equivalent
- 30,000 credits upfront
- Up to 1h 11m with 1.0 or 35m 42s with 2.0
- WebDubbing 2.0
- Watermark-free exports
- Credits valid for 365 days
- Cancel anytime
Save 69%
Pro
$75/ month
$245 / month
Billed $900 annually | Save $288 a year
Maximum annual capacity for production teams.
Includes
- 7,500 credits / month equivalent
- 90,000 credits upfront
- Up to 3h 34m with 1.0 or 1h 47m with 2.0
- WebDubbing 2.0
- Watermark-free exports
- Credits valid for 365 days
- Cancel anytime
Free
Free$0
Create with WebDubbing 1.0 before choosing a paid plan.
- WebDubbing 1.0
- Daily free credits
- Watermarked exports
- Free credits expire after 3 days
New-user and check-in rewards may vary.
Frequently asked questions
AI Lip Sync FAQ
Practical answers about audio input, source quality, duration limits, credits, and the difference between lip sync and video dubbing.
Can I lip sync a video to my own audio?
Yes. Upload an MP3, WAV, M4A, AAC, or OGG file, or record a voice take in your browser. WebDubbing uses that audio as the replacement speech for the generated video.
Can I create a lip sync video from text?
Yes. Enter the dialogue, choose and preview an available AI voice, then adjust speaking speed and volume before generating.
What videos produce the best lip sync results?
Use a stable video with one clearly visible main speaker, a face large enough to see, an unobstructed mouth, and speech that is reasonably close to the clip length. Multiple speakers, extreme side views, fast movement, and covered mouths can reduce quality.
How long can an AI lip sync video be?
Source videos can be between 1 and 600 seconds and up to 100 MB. Free accounts can generate videos up to 15 seconds. Accounts with purchased credits or an active plan can generate videos up to 10 minutes.
How are credits calculated and refunded?
Uploaded or recorded audio costs 3 credits per second. Text to Speech costs 4 credits per second. The amount shown before generation is reserved from the source video length. If the completed output is shorter, WebDubbing measures the result and automatically returns the unused difference. Confirmed failed tasks are refunded.
What is the difference between AI lip sync and video dubbing?
AI lip sync matches an existing video to the new audio or text you provide. Video dubbing translates the original speech into another language and handles the translated voice workflow. Need translation instead? Try Web Dubbing.
Bring the final voice to the shot
Add New Dialogue Without Recreating the Video
Upload your source video, add a finished audio track or new script, and create a synchronized version online.
Create AI Lip Sync VideoNo editing timeline required · free accounts up to 15 seconds · paid accounts up to 10 minutes