Sync Audio and Video

Key Features

• Precise Offset: Shift audio forward or backward by fractions of a second (e.g., +0.5s or -0.2s).
• Fix Lip Sync: Correct common issues where the voice is heard before or after the lips move.
• Client-Side Privacy: Your personal vlogs and files stay on your device. We process them in your browser.
• Instant Preview: Watch the original video directly in the uploader to spot the delay.
• Format Friendly: Supports popular video formats (MP4, MOV, MKV) and audio formats (MP3, WAV, AAC).
• No Watermark: 100% free for personal and commercial use.

How do I use it?

It's simple: Step 1: Upload your Video. Step 2: Use the +/- buttons to set the delay (e.g., +0.5s if audio is too early). Step 3: Click "Sync Now" to fix the video.

How do I download?

Once the audio is synced and merged, the preview will update. Simply click the large Download Video button to save the corrected file.

Is this tool free?

Yes, this tool is 100% Free. Perfect for TikTok creators, YouTubers, and Vloggers who need to fix recording lag or sync issues.

What files can I upload?

You can upload standard video files like MP4, MKV, and WebM along with your favorite background music files (MP3, M4A, WAV).

Privacy & Security

Your privacy is our priority. Since this tool runs Client-Side (in your browser), your media files are never uploaded to our servers.