Free Video Merger

Merge Video

Combine multiple videos into one.
Join clips seamlessly.

How to Merge Video - Join Videos Online

Merge videos online. Combine MP4, WebM clips into a single file.

Upload

Select or drag and drop your file to start merge video online. No account or software install required.

Arrange

Arrange clips in the order you want before merging—perfect for merge video projects.

Download

Download your result instantly. Your merge video output is ready to share, email, or publish.

Why Use FormatWiz for Merge Videos?

Free, secure Merge Videos with client-side processing—no signup required.

Any Format

Merge different video formats.

Seamless

Smooth transitions.

Secure

Client-side merging.

100% Secure

Your Merge Videos runs locally in the browser—files never upload to our servers.

Lightning Fast

No upload queues—get instant results from our free Merge Videos online.

Why matching formats merge best

Joining clips is seamless when they agree on resolution, frame rate and codec — the encoder just continues. Mix a 30 fps phone clip with a 24 fps camera file and something has to give, usually as stretching or creeping audio desync. Convert to a common format first and the join disappears.

Fact	Detail
Combined size limit	500 MB total
Clip order	Yours to arrange
Same-format clips	Join cleanly
Mixed frame rates	Risk of audio drift — normalise first
Mixed resolutions	Risk of stretching — convert first

Typical jobs people use this for

Stitching three phone clips of one event into a single video
Joining intro + screen recording + outro for a tutorial
Combining dashcam segments into one continuous file

When this is the wrong tool

If the clips need anything between them — a crossfade, a title card — that is editing, not merging. And merging cannot fix clips that already differ in quality; it faithfully preserves the mismatch.

Frequently Asked Questions

Do the clips need to be the same format?

Results are far more reliable when they are. Clips that share a resolution, frame rate and codec join cleanly; mixing a phone recording with a screen capture can produce stretching or audio drift. Converting everything to a common format first is worth the extra step.

What is the size limit?

Up to 500 MB in total. Since merging combines files, keep the combined size in mind rather than checking each clip individually.

Can I control the order clips appear in?

Yes — clips are joined in the order you arrange them before merging, so you can sequence them however you need.

Will the audio stay in sync?

It will when the source clips have consistent frame rates. Drift almost always traces back to mixing footage recorded at different frame rates, such as 30 fps phone video with 24 fps camera footage, so normalising them first prevents the problem.

Is my footage uploaded?

No. The merge runs entirely in your browser and nothing leaves your device.

Guides & Tutorials

Step-by-step guides for every FormatWiz tool — free, private, and browser-based.

View all guides

Video3 min read

How to Merge Videos Online Free and Combine Clips Into One File

Learn how to merge videos online free, combine clips, and join MP4 files into one video in your browser — no signup, with client-side processing.

Read guide

Video4 min read

How to Convert Video Online Free Between MP4, AVI, and MOV

Learn how to convert video online free with no signup — change MP4, AVI, MOV, and WebM formats in your browser using fast client-side processing.

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Video3 min read

How to Trim, Crop, and Rotate Video Online for Free

Learn how to edit video online free — trim clips, crop the frame, and rotate footage in your browser with no registration and client-side processing.

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