# Video Merger > Combine several video files into one, in the order you choose. Free, no upload, no watermark, and no limit on file size or count. - URL: https://farvixo.com/tools/video/video-merger - Category: Video Tools (https://farvixo.com/tools/video) - Price: Free - Last reviewed: 7 August 2026 - Publisher: Farvixo Technologies ## What is Video Merger? Video Merger is a free browser-based video tool from Farvixo that lets you join multiple videos into one file. It uses an in-browser FFmpeg build compiled to WebAssembly, so even large clips are processed on your own machine and never uploaded. No account, no watermark and no per-file size limit imposed by a server. ## Specifications | Property | Value | | --- | --- | | Tool | Video Merger — Video Tools | | Purpose | Join multiple videos into one file | | Input | One or more files (MP4, WebM, MOV, AVI, MKV) | | Output | Video file in the selected container and codec | | Processing | In your browser — files are never uploaded to a server | | Price | Free, unlimited, no account required | | Limitations | Bounded by your device's memory and CPU rather than a server quota; very large files may be slow on older hardware | ## How to use Video Merger 1. **Load your video** — Select a video file in Video Merger. Conversion happens in your browser using WebAssembly, so even large files never get uploaded anywhere. 2. **Pick format and quality** — Choose the output format, resolution and bitrate — or start from a ready-made preset if you are not sure what to pick. 3. **Convert and save** — Start the conversion and watch the progress bar; longer clips take a little time because the work runs on your own machine. Download when it finishes. ## Use cases - Getting a clip under the size limit for WhatsApp, Gmail, Discord or a course upload - Converting a recording to a format a specific player, editor or platform accepts - Editors who want a quick change without opening a full desktop suite - Handling confidential footage that must not be uploaded to an online converter ## Tips - Processing speed depends on your own CPU, since the work is local. A laptop on battery-saver will be noticeably slower. - H.264 (MP4) is the safest choice for compatibility; VP9 or AV1 give smaller files but decode slowly on older devices. - Leave the tab open and visible — a backgrounded tab gets throttled by the browser and the encode will crawl. ## Common problems - **The encode is very slow** — Everything runs on your device rather than a server farm. Pick a lower resolution or a faster preset, keep the tab in the foreground, and close other heavy tabs. - **The output has no sound** — The chosen container cannot carry the source audio codec — WebM cannot hold AAC, for example. Re-encode the audio instead of copying the stream. - **The browser ran out of memory** — The clip is too large to hold in memory. Trim it into shorter segments and process them one at a time. ## FAQ ### Do the clips need the same resolution? They do not have to be, but mixing them means everything is re-encoded to a common size, which takes longer and costs a little quality. Clips that already match in resolution, frame rate and codec join almost instantly. ### Why is the audio out of sync after merging? Usually a frame-rate mismatch between clips, or a source with variable frame rate — phone recordings often are. Normalising to a constant frame rate during the merge fixes it. ### Can I set the order? Yes. Drag the clips into the order you want before merging; they are joined exactly as listed. ### Is there a limit on how many videos? No. Since processing is local there is no server-imposed cap — only what your device can hold in memory while working. ### Is there a quality loss when merging? None if the clips share codec, resolution and frame rate — the streams are copied. Mismatched clips must be re-encoded to a common format, which costs a little. ## Related tools - [Video Converter](https://farvixo.com/tools/video/video-converter): Convert videos to MP4, WebM, MKV, MOV, GIF or extract MP3/AAC — AI analysis, batch queue, social presets, 100% private FFmpeg in your browser - [Video Compressor](https://farvixo.com/tools/video/video-compressor): Shrink videos to a target file size — hit 16 MB for WhatsApp or 25 MB for email with two-pass encoding, live size prediction and no visible quality loss, 100% private in your browser - [Video Trimmer](https://farvixo.com/tools/video/video-trimmer): Cut and trim video clips precisely - [Video Splitter](https://farvixo.com/tools/video/video-splitter): Split a video into equal parts - [Video Watermark](https://farvixo.com/tools/video/video-watermark): Add text watermarks to videos - [Video to GIF](https://farvixo.com/tools/video/video-to-gif): Turn video clips into animated GIFs --- > Machine-readable index: [llms.txt](https://farvixo.com/llms.txt) · full corpus: [llms-full.txt](https://farvixo.com/llms-full.txt) · agent skill: [skill.md](https://farvixo.com/skill.md). 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