For best results and widest format support, use Chrome or Edge on a desktop computer. Other browsers use a different engine with limited codec support.
Bulk Video Converter
VidShift is a free batch video converter that lets you convert multiple videos at once directly in your browser. Select or drop a set of clips, pick a single output format, and every file is re-encoded locally using WebAssembly and WebCodecs - no uploads, no accounts, no watermarks. Because bulk video conversion runs on your own device, your footage never touches a server, which keeps it private and removes the upload wait you get with cloud tools. The batch queue accepts MP4, WebM, MOV, MKV, M4V, MPEG, OGV, MP3, AAC, WAV, FLAC and OGG as input, so you can standardise mixed recordings from phones, cameras and screen captures into one clean format. It works on desktop and mobile, runs offline after the first visit, and has no daily caps or file limits. For single-file jobs, use the main video converter.
Drop multiple files here
or click to select files
🔒 Your files never leave your device - 100% private & secure
Have older WebM files? Use the dedicated WebM to MP4 converter for the best results.
Why Batch Convert Videos in Your Browser?
Browser-based batch conversion removes the trade-offs of traditional online tools. There is no upload, no account and no paid tier - and because the encoder runs locally, the experience scales with your hardware rather than a shared server.
Your files stay private
Every file in the batch is read, decoded and re-encoded entirely on your device. Nothing is sent to a remote server, and nothing is stored after the tab closes. That means sensitive footage - family videos, client work, internal recordings - never leaves your computer or phone.
No upload wait, no server queue
Cloud converters need to upload each file, queue it behind other users, process it on a shared server, then deliver the result back to you. VidShift skips every step of that loop. Added clips stay pending until you click Convert All, and the batch then processes locally with hardware acceleration through WebCodecs where your browser supports it.
Works offline after the first visit
VidShift installs a service worker on first load, so the batch converter keeps working without a network connection. You can queue up files on a plane, in a cafe with patchy Wi-Fi, or on a locked-down corporate network and still convert everything locally.
No file limits, no watermarks
There are no daily caps, no size caps beyond your device's memory, and no watermarks added to the output. Convert two files or two hundred - the behaviour is the same, and every resulting file is clean.
How to Batch Convert Videos Online
Add your files
Drag multiple video or audio files onto the page, or click Select Files to browse. You can add more files at any time with the Add More Files button.
Choose output settings
Select a target format - MP4, WebM, MOV, MKV and others for video, or MP3, AAC, WAV, FLAC, OGG for audio. Optionally adjust the resolution and quality level. All files in the batch use the same settings.
Convert all files
Click Convert All. VidShift processes each file sequentially in your browser using WebAssembly - nothing is uploaded to a server. A progress indicator shows the status of each file.
Download the results
When all conversions are complete, click Download All to save every file at once, or download individual files from the queue.
When to Use Batch Conversion
Batch conversion saves time when you need to standardise a collection of clips - for example, converting phone recordings from different devices into a single format for editing, preparing a folder of videos for upload to a platform that requires a specific format, or archiving old footage into a modern, space-efficient container. Instead of converting files one by one, you can queue them all up and let VidShift handle the rest.
Batch Converter FAQ
How does the batch video converter work?
Select or drag multiple video and audio files, choose your output format, resolution and quality, then click Convert All. VidShift processes each file sequentially using WebAssembly and WebCodecs - entirely in your browser. Nothing is uploaded to a server.
How many files can I batch convert at once?
There is no hard limit on the number of files. The practical limit depends on your device's available memory. Each file is converted one at a time, so even large batches will complete - they just run sequentially. You can add more files to the queue at any time. To compress files individually with more control, try the video compressor.
Can I convert different file types in the same batch?
Yes. You can mix video and audio files of any supported input format in a single batch. All files will be converted to the same output format you select. Supported inputs include MP4, MOV, MKV, WebM, OGG, MP3, WAV, AAC, FLAC, and MPEG-TS.
Are my files uploaded when using the batch converter?
No. Just like the single-file converter, the batch converter runs entirely in your browser. Your files never leave your device. There is no server involved - all processing uses your computer's local resources.
Does the batch converter add watermarks to my videos?
No. VidShift never adds watermarks, logos, or overlays to any of your converted files - whether you convert one file or a hundred. Many online batch converters watermark output unless you pay. VidShift is completely free with no watermarks on any file.
Can I download all converted files at once?
Yes. Once all files have been converted, a Download All button appears which downloads every converted file. You can also download individual files as they complete by clicking the download icon next to each file in the queue.
What happens if one file fails during a batch conversion?
If a file fails, VidShift marks it as failed and moves on to the next file in the queue. The rest of the batch continues processing normally. You can still download the files that converted successfully.
What formats does the batch converter support?
Input: MP4, MOV, MKV, WebM, M4V, MPEG, MPG, OGV, MP3, AAC, WAV, FLAC, OGG and MPEG-TS. Output: MP4, WebM, MOV, MKV, M4V, MPEG-TS (.ts container) and OGV for video, plus MP3, AAC, WAV, FLAC and OGG for audio-only. You can mix input formats in the same batch and convert them all to a single output format.
Is there a file size limit for batch conversion?
VidShift does not enforce a file size limit. The practical per-file limit is set by your browser's memory - most desktops handle files of several gigabytes, while mobile browsers typically handle a few hundred megabytes per file. Files are converted one at a time, which keeps peak processing memory low, but each completed output is held in memory until you download it or reset the batch. For very large outputs or long queues, download files as they finish or run smaller batches. Lowering the output resolution also reduces memory use during encoding.
Does the batch converter work offline?
Yes. After the first visit, VidShift is cached by a service worker and the batch converter keeps working with no network connection. The conversion code, WebAssembly decoder and UI all run locally, so you can queue and convert files on a plane, in the field, or on an isolated network.
Can I batch convert videos on mobile?
Yes. The batch converter runs in any modern mobile browser, including Safari on iOS and Chrome on Android. Phone hardware is less powerful than a desktop, so very large or 4K clips may convert more slowly or hit memory limits - lowering the output resolution usually solves it. For a folder of typical phone recordings, batch conversion on mobile works without issue.
How do I bulk convert MOV files to MP4?
Drag your MOV files onto the page or click Select Files and choose them from your device. In the format dropdown, pick MP4. Leave resolution and quality on Original to match the source, then click Convert All. VidShift re-encodes each MOV to MP4 sequentially in your browser and offers a Download All button when every file is ready. For a single-file conversion, the WebM to MP4 converter follows the same process.
VidShift Batch Converter lets you convert multiple video and audio files at once, entirely in your browser. Unlike traditional online converters that upload your files to remote servers, VidShift processes everything locally using WebAssembly and WebCodecs. Add as many files as you need, pick a format, and convert them all with a single click. Your files never leave your device - making it the most private way to batch convert media files online. No watermarks, no signups, no file limits. Supports MP4, WebM, MKV, MOV, MP3, FLAC, WAV and more.