Why does my merged video have no audio?

Quick Join copies streams as-is. If one of your clips has no audio track, the concat demuxer may drop audio for the entire output. Switch to Smart Join, which explicitly maps audio streams and handles missing audio tracks by substituting silence. Also check that each clip plays with audio before joining.

Can I merge iPhone videos (MOV) with Android videos (MP4)?

Yes, but use Smart Join. iPhone MOV files use HEVC (H.265) and Android MP4 files typically use H.264. Quick Join requires matching codecs. Smart Join re-encodes everything to H.264 MP4, so iPhone and Android clips merge seamlessly. Set output resolution to 720p or 1080p for a reasonable file size.

How do I change the order of my clips?

After uploading, you can drag clips in the list to reorder them. The final video will play clips from top to bottom in the order shown. You can also remove individual clips by clicking the × button next to each clip.

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

No hard limit. With Quick Join (copy mode), even 20 clips join in seconds since no re-encoding happens. With Smart Join, each additional clip adds re-encoding time. For reference, joining 5 one-minute clips at 720p Balanced typically takes 30–90 seconds on a modern computer.

Merge Phone Video Clips

Merge phone video clips into one video online. Join MP4, MOV clips from iPhone and Android in your browser — no upload, instant, free.

Drop videos here

or click to add files

MP4, MOV, AVI, MKV, WebM, WMV and more · multiple files supported

Join Settings

Join Method

Merging short phone video clips is one of the most common video editing tasks people need to do without dedicated software. Whether you recorded a birthday in three separate takes, captured several angles of a performance, or split a long recording into shorter clips to save storage, joining them back together into one seamless video is a simple but frequently needed operation. Zolkit's Quick Join mode is ideal for phone clips: it copies the video and audio streams without re-encoding, so a 10-second join of three 500 MB iPhone videos completes in under 10 seconds rather than several minutes. For iPhone users, all videos from the same device share the same codec (HEVC on newer iPhones, H.264 on older ones) and resolution, making Quick Join the perfect choice. For Android users, the same applies as long as all clips are from the same device and app. If you mixed clips from your phone with clips from a friend's device, switch to Smart Join to handle the codec differences automatically.

Related Use Cases

← Video Joiner Combine Video Clips Online Add Music to Video Online

Free Online Video Joiner — Merge Video Clips in Your Browser

Zolkit's Video Joiner uses FFmpeg WebAssembly to combine video clips and merge audio with video entirely in your browser. Upload multiple MP4, MOV, AVI, MKV, or WebM files, arrange them in order, and join them into a single MP4 — without uploading a single byte to a server. Quick Join copies streams without re-encoding for near-instant results with same-format clips. Smart Join re-encodes with H.264 to handle clips from different cameras, resolutions, and codecs. The Add Audio tab lets you replace or mix an audio track into any video file. All processing runs locally on your device.

100% Private

Your videos never leave your device. All processing runs in WebAssembly inside the browser tab — no server, no cloud, no data retention.

Join Any Clips

Quick Join copies streams for near-instant merging of same-format clips. Smart Join re-encodes with H.264 to handle clips from different devices and resolutions.

Drag to Reorder

Arrange clips in any order by dragging. See filenames and sizes at a glance. Remove any clip before processing.

Add Audio to Video

Replace a video's audio track with music or a voiceover, or mix the new audio with the original. Supports MP3, AAC, WAV, FLAC, and OGG.

FFmpeg-Powered

Uses FFmpeg's concat demuxer for copy mode and filter_complex concat for re-encode mode — the industry standard for video joining.

Free, No Account

No subscription, no sign-up, no watermark, no file count limit. Zolkit's Video Joiner is completely free.

How to Merge Video Clips Online

1
Click 'Join Videos' tab, then drop your video files onto the upload zone or click to select multiple files. Files are listed in join order.
2
Drag clips to reorder them. Choose Quick Join (for clips from the same device/camera) or Smart Join (for clips from different sources). Set quality and resolution if using Smart Join.
3
Click 'Join Videos', wait for processing, then download the merged MP4. For adding audio, switch to the 'Add Audio to Video' tab and upload one video plus one audio file.