WebM to MP4 converter
A fast, private way to change WebM to MP4. Drag, drop, download – your files never sit on our servers longer than they have to.
Convert WebM to MP4
Drop your files to try StandardsPDF. This tool is available in the full workspace.
Keeps the video stream and audio track in sync
Lets you pick a quality preset to balance size and clarity
Free to try with no account and no watermark
Batch several WebM files in a single conversion
How it works
Convert WebM to MP4 in 3 steps
Select the WebM you want to convert
Start the conversion – most finish in seconds
Grab your new MP4, ready to use
Private by default
Files are encrypted in transit and deleted within 60 minutes.
Fast
Most jobs finish in under 10 seconds. No queueing.
No signup on free tier
5 documents per day, no credit card required.
FAQ
Frequently asked questions
How do I convert WebM to MP4?+
Upload your WebM file (or drag it onto the box above), wait a few seconds while StandardsPDF converts it in your browser, then download the MP4. There is nothing to install and no account required.
Is converting WebM to MP4 free?+
Yes. WebM to MP4 conversion is free on the StandardsPDF free tier – no watermark, no signup, and no credit card. A Pro tier lifts the file-size and daily limits if you need more.
Will the MP4 keep the quality of my WebM?+
StandardsPDF aims for the highest fidelity the MP4 format allows, so your video comes through looking as close to the original as possible. Some format-specific details may adapt where MP4 works differently to WebM.
Will the audio from my WebM stay in sync in the MP4?+
Yes – when converting WebM to MP4 the audio track is muxed back with the video so playback stays perfectly in sync.
How long does a WebM to MP4 conversion take?+
Most WebM files convert to MP4 in a few seconds. Larger or higher-resolution files take a little longer, but there is never a queue on the free tier.
Is my WebM file kept private during WebM to MP4 conversion?+
Yes. Your WebM is processed in an isolated worker, never shared, and permanently deleted from our servers within 60 minutes. Most WebM to MP4 conversions happen right in your browser.
Do I need to install anything to convert WebM to MP4?+
No. Converting WebM to MP4 runs entirely in the browser – no desktop software, no extensions and no account for the free tier.
What is the maximum WebM file size I can convert to MP4?+
Up to 100 MB per WebM on the free tier and 2 GB on Pro. If your WebM is larger, split it first or upgrade for the higher limit.