Merge Videos Online
Combine compatible video clips in your chosen order and export one H.264 MP4 locally. Reorder, merge and preview without uploading your videos.
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Your video stays on your device — processed locally in your browser, never uploaded.
Quick Facts About Merge Videos Online
Combine compatible video clips in your chosen order and export one H.264 MP4 locally. Reorder, merge and preview without uploading your videos.
- Input
- At least two supported clips with compatible coded dimensions and audio parameters
- Output
- One MP4 with re-encoded H.264 video
- Clip order
- Move clips up or down and remove unwanted items
- Output dimensions
- First clip’s coded width and height, rounded down to even values
- Frame rate
- Source frame timings retained; no single FPS normalization setting
- Audio
- Decoded and re-encoded using AAC or an Opus fallback when supported
- Processing
- Local WebCodecs processing; output is held in browser memory
What Happens When Videos Have Different Resolutions?
TakeVid takes the output width and height from the first clip’s coded dimensions and rounds them down to even numbers. The video source is configured to fit frames proportionally inside that canvas using contain, which preserves aspect ratio and can leave padding instead of stretching or cropping. However, the current processing library checks whether incoming coded dimensions change before applying that transform. Because this tool does not override the library’s default rejection behavior, clips with different coded dimensions can fail rather than being automatically normalized. Use compatible source dimensions for this version; automatic mixed-resolution merging is not a supported promise.
How Are Frame Rate and Audio Handled?
The tool retains each decoded frame’s duration and rebases timestamps onto the combined timeline. It does not choose a single output frame rate or resample all clips to a fixed FPS. Audio is decoded and re-encoded rather than copied. The first available audio track determines the shared audio configuration: the helper attempts source-rate AAC, then 48 kHz AAC, with an Opus fallback and a stereo channel limit. Incoming clips with different sample rates or channel counts can currently fail before resampling. Video and audio each begin from their own first sample, so a source’s intentional offset between the two is not guaranteed to survive. Preview joins and listen to the result before sharing.
Merge Videos vs Video Converter
Merge Videos places two or more clips one after another in your chosen order to produce a single timeline. Video Converter processes one input file to change its container, quality, resolution or frame rate. This merger decodes and re-encodes its source video and audio; it is not a lossless stream-copy joiner. Use conversion to prepare supported clips where appropriate, then merge compatible files. If clips have different aspect ratios or audio configurations, verify compatibility rather than assuming that changing the extension alone will fix it.
| Task | Choose | Result |
|---|---|---|
| Several clips in sequence | Merge Videos | One continuous output file |
| One file needs another container or settings | Video Converter | One converted file |
| The combined file is too large | Video Compressor | A target-size re-encoded MP4 |
| Only one section is needed | Video Trimmer | One selected time range |
A Practical Merging Workflow
Add at least two clips that your browser can decode, check for input errors, and use the arrows to set the order. Compatible dimensions and audio parameters are important in the current version. Start the merge, then preview the exported MP4, especially at every join. The source files stay on your device; encoding takes place in the browser and the complete result is held in memory. There is no fixed supported clip count or size that works on every device. Keep the originals and use shorter batches if memory or encoder errors occur.
How to Merge Videos
- Add at least two supported clips with matching coded dimensions and compatible audio settings.
- Use the arrows to choose the order and remove unwanted clips. Convert mismatched sources to matching settings first.
- Merge locally, then preview every join and check the audio before downloading the MP4.
Why Use TakeVid to Combine Videos
- Join multiple compatible clips in your chosen order
- Reorder or remove clips before encoding
- Export H.264 video in one MP4 file
- Use clips with matching dimensions and compatible audio parameters; mixed sources can fail
- Source frame timing is retained rather than normalized to a selected FPS
- Free, without registration or an added watermark
- Local WebCodecs processing; memory and codec support limit the workable batch size
Supported Formats
Supported MP4, WebM, MOV and MKV files require compatible codecs, matching coded dimensions and compatible audio parameters. The output is H.264 MP4 with AAC audio where available, or an Opus fallback. Some unsupported audio may be omitted; check the result.
Common Use Cases
- Join clips recorded with the same device settings
- Combine compatible screen recordings into one tutorial
- Assemble prepared travel or event highlights in order
- Merge trimmed sections after matching their dimensions and audio settings
Privacy & Browser Processing
This tool runs entirely in your browser using WebCodecs. Your video is decoded, processed and re-encoded on your device — it is never uploaded to a server, and everything is released when you close the tab.
Related Video Tools
- Video Trimmer Online — Trim a video to one selected range with filmstrip handles and 0.1-second time controls. Preview the selection and export a frame-aligned MP4 locally in your browser.
- Video Converter Online — Convert supported videos to MP4, WebM, MKV or MOV locally. Choose quality, resolution and frame rate, with H.264 or VP9 output and no video upload.
- Compress Video to a Target Size — Reduce video file size with a custom MB target. TakeVid selects bitrate, resolution and frame rate locally, checks the result and exports H.264 MP4 without uploads.
- Add Audio to Video Online — Add music or a voice recording, replace original sound, or combine separate video and audio files. Set each volume manually and export an MP4 locally in your browser.
Download Videos with TakeVid
TakeVid is a browser extension that detects supported video and streaming resources on many websites. Save compatible media in your browser, then edit the source clip with these local video tools.
Frequently Asked Questions
Will merging reduce the video quality?
Every clip is decoded and re-encoded as H.264, so quality and file size can change. The result depends on the source and encoder. Keep the originals and review the joins and sound before sharing.
Can videos with different resolutions or frame rates be merged?
The current merger can reject clips with different coded dimensions or incompatible audio sample rates and channel layouts. It does not normalize every source to one frame rate. Use matching recording settings or convert the clips to matching dimensions and audio settings first.
Which input formats are supported? Are there limits on count or size?
Supported MP4, MOV, WebM and MKV files need readable codecs and compatible dimensions and audio settings. Browser memory, codec support and processing time set practical limits; no single safe total size or clip count applies to every device.
Why does it say my browser is not supported?
The browser needs WebCodecs plus the codecs required by your files and the H.264 output. Try a recent desktop Chrome or Edge and a short supported clip; API availability alone does not guarantee every codec works.
What determines the processing speed? Are files uploaded?
Duration, resolution, source codecs and your device determine processing time. Decoding and encoding happen locally without uploading the clips to TakeVid. The complete output uses browser memory; large batches can fail.