Three Free Online Video Mergers: Clipchamp, Kapwing, MyTools

You have three clips you want stitched into a single video. Maybe it's a weekend trip filmed in chunks on your phone. Maybe it's a screen recording you broke into three takes. Maybe it's a wedding-day pile of clips from five different cameras. The job is simple. The tools that solve it are not all simple — some want you to sign in, some watermark the output, some are full editors when all you need is glue.

This is a comparison of three free, browser-based video mergers — Clipchamp, Kapwing, and MyTools — focused on the one job they all do: combining two or more clips into one video. No paid tiers, no desktop apps. Just what each one gives you in a browser tab.

When You Actually Need to Merge Videos

The category looks small from the outside — "I just want to put two clips together" — but the friction lives in the details. The clips were filmed on different devices, so they have different resolutions and codecs. The total runtime might be twelve minutes and 800 MB. Half the readily-available tools want a sign-up before you even see the upload button. The other half stamp a watermark across the corner of the export.

There are three recurring jobs that send people looking for an online merger:

• Personal footage — combining phone clips from a trip or family event into something one person can share without overwhelming a group chat.
• Screen recordings — joining tutorial or demo takes into a single file before sending it to a client, a team, or a YouTube upload.
• Multi-source clips — stitching together footage from several phones or cameras (weddings, interviews, school events) into a keepsake.

People use a browser tool because the alternative is opening DaVinci Resolve or iMovie for a job that should take ninety seconds, on a laptop that may not even have a desktop editor installed. The best merger gets out of the way fast.

Clipchamp

Microsoft's browser-based editor, bundled into Windows 11 and accessible at clipchamp.com. Clipchamp is a full timeline editor, not a single-purpose merger, so the merge workflow is "add clips to the timeline, line them up, export." Free with a Microsoft account.

What it gets right

• Real editing capability: timeline, transitions, trim, text overlays, audio mixing — far more than a merger, all in one tab.
• 1080p export with no watermark on the free tier.
• Processes media locally on your machine rather than uploading to the cloud; only project metadata syncs to your Microsoft account.
• Tightly integrated with OneDrive, Stock libraries, and Windows 11 — opens fast if you already live in that ecosystem.

Where it falls short

• Requires a Microsoft account to use. There is no anonymous mode.
• 2 GB per-file import cap, which can bite when you're working with a single long screen recording or a 4K clip.
• The UI is heavier than the job needs if all you want is to glue three files end-to-end — the timeline metaphor adds steps a merger could skip.
• Best on Microsoft Edge and Chrome; the experience on other browsers is noticeably less reliable.

Kapwing

A popular browser editor positioned around collaboration and AI features (auto-subtitles, AI voice, templates). The dedicated merge tool at kapwing.com/tools/merge is one of several entry points into the same underlying editor.

What it gets right

• Polished drag-and-drop interface with a clean upload-to-export flow.
• A full editor sits behind the merger, so if mid-job you decide you also want to trim, add captions or a title card, you don't change tools.
• Cross-device project sync if you do sign in — start on a laptop, finish on a different one.
• Strong format coverage and a fast preview pipeline.

Where it falls short

• Free-tier exports are subject to length limits — reports of the cap range from one minute to seven minutes depending on the workspace, which makes the free plan hard to rely on for anything beyond a short clip.
• 250 MB per upload on the free tier, which excludes most longer phone recordings and almost all desktop screen captures.
• Files are uploaded to Kapwing's servers for processing — the workflow is genuinely cloud-based, with the privacy implications that come with that.
• Projects on the free plan auto-delete after three days, and each folder is limited to three concurrent projects.
• Account is required (Google or email) before you can export.

MyTools

A single-purpose merger that runs entirely inside the browser tab. No account, no upload, no watermark, no extra editor wrapped around it. Capability is intentionally narrow — drop clips, reorder them, pick a resolution, merge.

What it gets right

• Genuinely local: clips are processed in the browser using WebAssembly, so files never leave your device — there is no upload step at all.
• No sign-up, no email, no payment prompt at any point. Open the page, merge, close the tab.
• Mixed-format inputs (MP4, MOV, WebM, AVI, MKV) all converge to a clean MP4 (H.264 + AAC) without a separate conversion step.
• When clips have different resolutions, mismatched ones are letterboxed rather than stretched — quality stays honest.

Where it falls short

• Capped at 10 clips per merge, 500 MB total across the batch, and 200 MB per individual clip. A long 4K screen recording can hit that ceiling on its own.
• No timeline editing inside the tool — no trim, no transitions, no audio replacement. Clips join with hard cuts in the order you set, full stop. If you need to trim a clip first, that's a separate trip through a different tool.
• Output codec is fixed at H.264 + AAC; you don't get a choice of container or codec.
• Long, high-resolution merges run up against browser memory limits well before you'd hit them in a desktop editor.

At a Glance

	Clipchamp	Kapwing	MyTools
Account required	Yes — Microsoft sign-in	Yes — Google or email	No
Watermark on free	No	Varies by free-plan limits	No
File size cap	2 GB per import	250 MB per upload	200 MB per clip, 500 MB total
Where it processes	Locally, project synced to cloud	Uploaded to Kapwing's servers	Locally in the browser tab
Beyond merging	Full timeline editor	Full editor + AI tools + collaboration	Merge only
Best for	Edits that need transitions/captions	Polished output with extra effects	A fast, anonymous join of a few clips

Which One Should You Pick?

If the job is actually editing — transitions between scenes, on-screen captions, a music bed, a voice-over — pick Clipchamp. It's a real editor, free at 1080p, and the local-processing model is a respectable balance between cloud features and privacy. The Microsoft sign-in is the price of entry, and worth paying if you'll use even half of the timeline.

If you want a slick interface, plan to add captions or AI-generated voiceover, and don't mind uploading to a server and signing in, Kapwing is the place. Just understand the free tier's shape: short export length, modest upload size, and three-day project retention. It's a free trial of a paid tool more than a free tool in its own right.

If the job is plainly "stick these few clips together, give me an MP4, don't waste my time," MyTools fits. No sign-in, nothing uploaded, no watermark, and the limits — 10 clips, 500 MB total — cover most personal merges in one pass. For anything bigger, longer, or needing real cuts, one of the other two is the right answer.

The three tools aren't really competing for the same job; they're competing for different jobs that all start with the same question. Pick by what the job actually is, not by which marketing page looks shiniest.

If your merge is the simple kind — short clips, no editing, files you'd rather not upload — open the MyTools video merger in your browser → and try it. It loads in a second and merges in under a minute.