LOCAL VIDEO REPAIR FOR WINDOWS

A conversation.
Back in sync.

Fix audio drift with two sync points. Preview the correction. Keep your video on your PC.

DownloadSee the sample ↗
SyncMend Windows application with a local video drop area and five-step repair workflow
Actual application UI · Pre-release build
Your files stay yours.Video processing happens on your computer.
Two points. One correction.Fix a constant offset and steady drift.
Keep the picture intact.Supported H.264 video is copied, not re-encoded.

You find the sync.
SyncMend does the math.

No AI guesses. No editing timeline to learn. Just listen, adjust and check.

  1. Choose your video

    Open a supported MP4 or MOV. SyncMend reads the duration and audio track locally.

  2. Align near the beginning

    Loop a short clip and shift the sound until it matches. Fine-tune in 10 ms steps.

  3. Align near the end

    Set a second sync point. The app calculates the fixed offset and audio stretch needed.

  4. Listen, then export

    Check the beginning, middle and end. Export a free five-minute sample, or unlock the full video.

HEAR WHAT CHANGES

A signal you can check.

This synthetic test pairs a visual flash with a beep. In the original, the audio drifts from early to late. Compare it with the corrected file.

ORIGINALSteady drift
Sound is intentionally out of sync.
CORRECTEDProcessed with SyncMend
Same video, corrected audio timing.

30-second generated test, not a customer recording. Play one sample at a time with sound on. This demonstrates linear drift correction, not automatic lip-sync detection.

A long video.
Not a long upload.

Your source video, previews and repaired file stay on your PC. SyncMend only contacts the licensing service for activation and paid export checks.

Read the draft privacy policy ↗

No media uploadsNo footage, file paths or filenames are sent to the licensing API.

No video re-encodingFor supported inputs, the picture is copied and the audio is processed into AAC.

No account dashboardActivate inside the app with a license key. Paid exports currently need an internet connection.

SIMPLE, ONE-TIME PRICING

Start with a preview.

Free previews, a single full export, or Personal 1.x. Prices are in USD. PayPal purchases are not open yet.

FREE

Find your sync.

$0 / to try

  • Two-point manual calibration
  • Beginning, middle and end previews
  • Export the first 5 minutes
  • Save and reopen projects
Download

SINGLE EXPORT

Just this video.

$0.50 / successful export

  • One full export credit
  • Videos up to 2 hours
  • No subscription
  • Online authorization required
View purchase options

PERSONAL

Keep things in sync.

$9.99 / one-time

  • Unlimited full exports in SyncMend 1.x
  • Up to 2 activated devices
  • No recurring subscription
  • Online authorization required
View purchase options

A failed or cancelled export normally releases its reserved credit. Interrupted exports may need recovery review. Personal covers version 1.x, not every future major version. How licensing works.

Right file.
Better result.

SyncMend is built for steady timing drift. It is not a general-purpose video repair app.

Computer
Windows 10 / 11, 64-bit. 8 GB RAM suggested; export speed depends on your PC.
Video
MP4 or MOV with H.264 video and one existing audio track.
Timing
Up to 2 hours. Each calibration offset within ±5 seconds. Drift must be linear.
Output
MP4 with AAC audio. Keep enough free space for the output and temporary previews.

Before the first fix.

Will it automatically match the voice to the lips?

No. You set two sync points by listening and watching. SyncMend computes the timing correction from those points.

What if the sound jumps out of sync halfway through?

That is not steady drift. This version does not support sudden jumps, edited timing discontinuities or piecewise corrections.

Does Personal mean lifetime access?

It means unlimited full exports for SyncMend 1.x, with no subscription. It does not include all future major versions. The current licensing design requires online verification for full exports.

Can I buy it now?

Not yet. PayPal is the planned payment method, but checkout is not open. No payment or order is created on this website.

Where do I enter an activation key?

Open the license panel in the app, paste your key, then select Activate license. Read the activation guide.

A clearer path to sync.

Practical reading before your next repair.

Browse the blog

Your next conversation.
In time.

The public release is being prepared. Downloads will open after the installer, licensing service and release checks are ready.

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Pre-release · No mailing list or payment details collected here

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