Will merging reduce the quality?

If your clips share the same format and size, Sondra joins them without re-encoding, so quality is unchanged. If they differ, it re-encodes to a single consistent video.

Are my videos uploaded to a server?

Never. Everything runs locally in your browser. Your files never leave your device.

Can I merge clips of different sizes or formats?

Yes. Sondra automatically matches different resolutions and formats so they join into one smooth video.

What order will the videos play in?

They play from top to bottom in the list. Use the up and down arrows to set the order before merging.

How many videos can I merge?

As many as you like, as long as the total size stays under the limit, which is 500MB on desktop and 100MB on mobile.

Yes. Merging videos on Sondra is free, with no signup and no watermark.

Can I merge videos on my phone?

Yes. Sondra works in mobile browsers, with a 100MB total limit on mobile.

Is there a limit on how many clips I can join?

There is no fixed limit on the number of clips. The only limit is the combined file size: up to 500MB on desktop and 100MB on mobile.

Does it work without internet?

After the page has loaded once, the merging itself runs offline in your browser. You only need a connection to open the page the first time.

Merge Videos Online and Join Clips

Combine several clips into one video. Drag them into order, then merge. Free, private, and right in your browser.

Drop videos here or click to upload

MP4, MOV, MKV, WEBM, AVI

Up to 500MB total on desktop, 100MB on mobile

Fast 100% private Free

How to merge videos

Add your videos

Drop in or pick the clips you want to join. They stay on your device.

Put them in order

Use the arrows to arrange the clips in the order you want them to play.

Merge and download

Join them into one video and save the result.

Why merge videos?

Stitch separate clips into one continuous video for YouTube, a reel, a slideshow, or a highlight. Sondra joins them back to back in the order you choose.

When your clips already match, Sondra joins them instantly without re-encoding. When they differ in size or format, it matches them automatically so the result plays smoothly. Everything happens in your browser, so your videos are never uploaded.

Sondra works with MP4, MOV, MKV, WEBM and AVI, joins your clips in the exact order you set, and never adds a watermark. Open the page, add your files, arrange them, and download one combined video in seconds.

What you can do by merging videos

Joining clips into a single file is useful in more situations than you might think. Here are the most common ones.

Build one long video

Combine separate recordings into a single continuous clip for YouTube or a class.

Make a highlight reel

Stitch your best moments together into one reel for Instagram or TikTok.

Join screen recordings

Merge several screen captures into one walkthrough or tutorial.

Combine phone clips

Put short phone videos back to back into one shareable memory.

Merge video for any platform

A merged MP4 plays everywhere. A few notes for the most popular places people share.

YouTube

Join your intro, main clip and outro into one upload instead of editing three separate files.

Instagram and TikTok

Combine short clips into a single reel that fits the in-app length limit.

iPhone and Android

The merged file plays in any gallery or messaging app, with no extra app needed.

Presentations

Merge demo clips into one video you can drop into a slide or a website.

Private by design

Most online mergers upload every clip to a server before joining them. Sondra does not. All the work happens inside your browser on your own device, so your videos are never sent anywhere and nobody else can see them.

That also means there is no waiting for a long upload, no account to create, and no limit on how many videos you join. Close the tab and nothing is left behind.