Do I need to download software to merge videos?

No. This tool runs entirely in your browser — no downloads needed. All video processing happens locally, files are never uploaded to a server, and your privacy is fully protected.

Online Video Merger

Merge multiple video clips online for free — no software download needed, reorder freely, powered by WebCodecs for fast processing

Drag-and-Drop Ordering

Reorder videos freely

WebCodecs Acceleration

Lightning-fast processing with hardware acceleration

Local Processing

Files are never uploaded to any server

Flexible Formats

Export to MP4 or WebM

Select videos to merge

Click or drag multiple video files here to merge them into one in order

Select Video Files

Supports MP4, WebM, MOV, and more. For best results, use videos with consistent dimensions

How to Use

Select Videos

Upload 2 or more video files

Adjust Order

Drag videos to arrange playback order

Choose Format

Select MP4 or WebM as the output format

Start Merging

Merge and download the full video in one click

Use Cases

Vlog Creation
Combine multiple clips into a complete vlog to capture life's best moments
Educational Videos
Merge multiple lesson segments into a complete course
Event Recordings
Join clips shot at different times to cover an entire event
Short-Form Video
Join multiple short clips to create engaging short videos

Technical Features

WebCodecs API

Built on the latest WebCodecs technology, using your browser's native codecs for processing 5-10x faster than traditional solutions

Hardware Acceleration

Automatically leverages GPU hardware acceleration for video encoding, significantly lowering CPU usage and keeping things smooth even with large files

Smart Adaptation

Automatically handles videos of different sizes with smart center alignment, keeping the aspect ratio intact

💡 Tips

Keep sizes consistent

We recommend merging videos of the same resolution for the best results. Videos of different sizes will be automatically center-aligned

Format Recommendations

Choose MP4 for broad device compatibility; choose WebM for smaller files on the web

Browser Requirements

A modern browser with WebCodecs support is required — Chrome 94+, Edge 94+, or Opera 80+ recommended

Reorder

Drag to reorder, or use the up/down arrow buttons to fine-tune each video's position

Frequently Asked Questions

How many videos can I join?

In theory there's no limit, but we recommend merging no more than 20 videos at a time. More videos mean longer processing time. For large batches, process in groups and merge again.

Can I merge videos of different formats?

Yes. The tool automatically decodes different formats (MP4, WebM, MOV, etc.) and re-encodes them into your chosen output format. Note that mixing formats may take more processing time.

What if videos have different dimensions?

The tool uses the first video's dimensions as the output size. Videos of different sizes are centered with their original aspect ratio preserved, and any extra space is filled with black. For the best results, unify video sizes before uploading.

How long does merging take?

Processing speed depends on total duration, resolution, and your device's performance. As a rule of thumb, merging three 1-minute 1080p videos takes about 1-2 minutes. WebCodecs makes this 5-10x faster than traditional solutions.

Why does a specific browser matter?

The tool uses the latest WebCodecs API technology, which is currently only supported in modern browsers like Chrome 94+, Edge 94+, and Opera 80+. WebCodecs provides hardware acceleration and high-performance video processing.

Will merging reduce video quality?

By default, the tool encodes at a high bitrate (2 Mbps video + 128 Kbps audio) to preserve good quality. Since re-encoding is needed, there's a slight quality loss compared to the original, but it's barely noticeable in most cases.