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M4V to WEBM Converter

Convert M4V to WEBM online for free. Fast, secure, and high-quality conversion with no sign-up or software required.

Free to useNo file stored beyond 1 hourEncrypted over TLS 1.2/1.3No watermarks

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How it works

Three steps to your converted file

Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.

01

Upload your file

Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.

02

Choose an output format

Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.

03

Convert & download

Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.

What is an M4V file?

The M4V file format is a video container format developed by Apple Inc., derived directly from the MPEG-4 Part 14 (MP4) specification. It is primarily utilized to encode video files-such as movies, TV episodes, and music videos-distributed through the Apple iTunes Store. Functionally similar to MP4, M4V files frequently employ Apple's FairPlay DRM (Digital Rights Management) protection to prevent unauthorized reproduction, though unprotected files exist. The container typically encapsulates H.264 or H.265 (HEVC) video data alongside AAC or Dolby Digital (AC-3) audio streams.

How to open an M4V file

Files protected by FairPlay DRM can only be decrypted and opened using Apple QuickTime Player or the Apple TV app on authorized devices associated with the purchasing Apple ID. Unprotected M4V files function identically to standard MP4 files and are natively supported on macOS. On Windows and Linux, unprotected M4V files can be opened by renaming the extension to .mp4 or by using cross-platform media players like VLC Media Player and MPC-HC without modification.

M4V Technical Info

Full Name
iTunes Video File
Developed By
Apple Inc.
Initial Release
2003
MIME Type
video/x-m4v

What is a WebM file?

WebM is an open, royalty-free audiovisual media file format sponsored by Google, derived from the Matroska (MKV) container. Designed specifically for the HTML5 video element, it restricts streams to specific codecs: video is compressed using VP8, VP9, or AV1, while audio utilizes Vorbis or Opus. The format structure is defined by a subset of the Matroska specifications, prioritizing efficiency for web streaming and low computational overhead for decoding in browser environments.

How to open a WebM file

As a native HTML5 format, WebM files open directly in modern web browsers including Google Chrome, Mozilla Firefox, Microsoft Edge, and Opera without plugins. For offline playback, cross-platform media players like VLC media player, MPV, and FFmpeg-based tools provide full support. Windows Media Player may require the installation of WebM Media Foundation Components to render these files.

WebM Technical Info

Full Name
Web Media
Developed By
Google
Initial Release
2010
MIME Type
video/webm

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Why RunConvert

The fastest way to convert any file

Purpose-built for speed, privacy, and breadth of format support.

Convert M4V to WEBM in seconds

Every M4V to WEBM conversion runs on our servers, so your device stays fast and the output quality stays intact.

Fast, cloud-powered

No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.

Secure & private

Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.

Free - no account needed

Convert without creating an account - no credit card, no trial clock. Sign in only if you want history and higher daily limits.

Developer API

Convert M4V to WEBM via API

Automate M4V to WEBM conversions in three steps: create a job, upload your file, then poll for the result.

# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tag": "m4v-to-webm",
    "tasks": {
      "upload-file": {
        "operation": "import/upload"
      },
      "convert": {
        "operation": "convert",
        "input": "upload-file",
        "output_format": "webm"
      },
      "export-result": {
        "operation": "export/url",
        "input": "convert"
      }
    }
  }'

# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.m4v

# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
  -H "Authorization: Bearer YOUR_API_KEY"

Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.