Video Side-by-Side Comparison

Free

Play 2 videos in sync — side-by-side or stacked. Export combined MP4.

Video 1 (left / top)Video 2 (right / bottom)

Export records the canvas in real time, then converts WebM → MP4 with ffmpeg.wasm. Allow ~1.5–2× clip duration.

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What is Video Side-by-Side Comparison?

Updated July 25, 2026

Play two videos in perfect sync, side by side or stacked on top of each other. Independent audio mixing, draggable split-bar, optional time offset for delay alignment, and a synchronized scrubbing timeline. Export a combined comparison video as MP4 — perfect for tutorial vs. attempt videos, original vs. edited footage, sport technique comparisons, A/B encoding tests, before/after VFX, and music covers.

video comparisonside by sidesplit screensync

Why choose Video Side-by-Side Comparison?

Video Side-by-Side Comparison enables users to play two videos in synchronized alignment with independent audio mixing, a draggable split-bar, and optional time offsets. It provides a straightforward way to evaluate visual differences without installing desktop software, and allows direct export of the combined result as an MP4 file.

Best for

comparing original versus edited footage
analyzing athletic or musical technique
performing A/B encoding tests
evaluating before-and-after visual effects

Good to know: Very large video files or advanced multi-track editing workflows may require dedicated desktop video editing software.

How to Use Video Side-by-Side Comparison

Synchronize and compare two videos side-by-side or stacked to export a combined MP4 comparison.

1
Upload your two video files
Select and upload the two video files you wish to compare from your local device.
2
Choose your preferred layout mode
Select between a side-by-side or stacked vertical layout and adjust the draggable split-bar for the best view.
3
Synchronize playback and set offsets
Use the synchronized scrubbing timeline and optional time offset to align specific moments in both videos perfectly.
4
Adjust audio mixing levels
Use the independent audio mixing controls to balance the sound from both video sources as needed.
5
Export the combined comparison video
Click the export button to generate and download your final synchronized comparison as a single MP4 file.

Estimated time: PT3M

Frequently Asked Questions

What is the Video Side-by-Side Comparison tool used for?

This tool allows you to play two videos in perfect synchronization for visual comparison. It is ideal for analyzing tutorial versus attempt footage, comparing original and edited clips, or reviewing A/B encoding tests and VFX work.

How do I sync two videos that have different starting points?

You can use the optional time offset feature to manually align the timing of both clips. Once the offset is set, the synchronized scrubbing timeline ensures both videos stay in lockstep as you move through the footage.

Can I export the side-by-side comparison as a single file?

Yes, once you have aligned and reviewed your videos, you can export the combined comparison directly as an MP4 file. This makes it easy to share your side-by-side or stacked results with others.

Is this video comparison tool free to use?

This is a free tool with a credit cost of zero. Anonymous users can perform up to 50 operations, while authenticated users receive an increased rate limit of 200 operations.

What layout options are available for the video display?

The tool provides flexible viewing options including side-by-side or stacked vertical arrangements. It also features a draggable split-bar, allowing you to manually adjust the focus between the two video sources.

How does the tool handle audio from two different videos?

The tool includes independent audio mixing capabilities for both video sources. This allows you to balance the volume levels or mute one track entirely to focus on the audio of the other while maintaining visual sync.

Where is my video data processed and is it private?

Your videos are processed directly in your web browser to ensure privacy and speed. Since the tool operates as a web-based utility, you do not need to install local software to compare or export your MP4 files.