MP4 to WebM Converter
Convert MP4 video files to WebM video online. Free, fast and private. No signup required.
How to convert MP4 to WebM
- Upload your MP4 file, or drag it into the box above.
- WebM is already selected as the output format. Change it if you need something else.
- Click Convert, then download your WebM file.
Why convert MP4 to WebM?
- Your app, website or device may not open MP4 files, but WebM is an open web video format that works widely.
- WebM is best for websites, browser playback.
What to expect
The video is re-encoded with widely supported codecs. Resolution and audio are kept; very long files take a little longer.
About MP4 and WebM
MP4 video (MP4)
MP4 (H.264 video with AAC audio) is the most compatible video format. It plays on phones, computers, TVs and every website.
Strengths- Plays almost everywhere
- Good quality at small sizes
- Ideal for uploading and sharing
- Lossy compression
WebM video (WebM)
WebM is an open, web-friendly video format from Google. It streams well in browsers at small file sizes.
Strengths- Small files
- Made for the web
- Royalty free
- Not supported by some Apple apps and older TVs
MP4 vs WebM
| MP4 | WebM | |
|---|---|---|
| Full name | MP4 video | WebM video |
| What it is | The most compatible video format | An open web video format |
| Compression | Lossy (smaller files) | Lossy (smaller files) |
| Best for | sharing, YouTube and social uploads, email | websites, browser playback |
Frequently asked questions
How do I convert MP4 to WebM?
Upload your MP4 file, make sure WebM is selected as the output format, and click Convert. Your WebM file downloads in seconds. No account or software is needed.
Is this MP4 to WebM converter free?
Yes. It is completely free, with no signup, no watermark and no limit on how many files you convert.
Will I lose quality converting MP4 to WebM?
The file is re-encoded at high quality, so the result looks and sounds nearly identical. Lossy formats always discard a little data, so keep the original if you need a perfect master.
Are my files safe?
Your file is processed once, in memory, to make the converted copy. It is not stored on our server or shared with anyone.
Can I convert several MP4 files at once?
Yes. Drop several MP4 files together and they are converted in one go. You can download them individually or as a ZIP.
What is the maximum file size?
Files up to 100 MB are supported. Larger videos and very large images may take a little longer to process.
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Why QuickFix Beats the Rest
Built for speed, precision, and privacy — every time.
Instant Conversion
Files convert server-side with optimized pipelines. Most conversions complete in under 10 seconds, even for large files.
Batch Convert
Drop 50 files at once. Convert all to the same format and download individually or as a single ZIP package — one click.
Preview Before Download
View your converted file right in the browser before saving. Supports image preview, audio/video playback, and text preview.
Smart Format Detection
Upload a file and we instantly detect its type. Only compatible output formats are shown — no guessing, no errors.
Cloudflare Protected
Every upload is protected by Cloudflare WAF, rate limiting, and DDoS mitigation. Your files are safe from malicious actors.
Zero Storage
Files are processed in memory and deleted immediately. We never store your data permanently — not even temporarily.
How It Works
Four steps. Under a minute. Every time.
Upload Your Files
Drag and drop or click to browse. You can upload multiple files at once — up to 100MB each. We support every major format with zero setup required.
Choose Your Output Format
Smart detection shows only the formats compatible with your files. Search by name, browse by category, or click a popular conversion shortcut.
Adjust Quality Settings (Optional)
Fine-tune image quality, audio bitrate, video resolution, and more. Or leave defaults for the best automatic settings.
Preview & Download
When conversion is complete, preview your file in the browser first. Then download individually or as a ZIP — no auto-download, you're always in control.
Supported Formats
200+ formats across every major category
Frequently Asked Questions
Images (output): JPG, PNG, GIF, BMP, WebP, TIFF, ICO, PDF, SVG
Documents: TXT, Markdown (MD), HTML, Word (DOCX) and PDF — headings, lists, tables and pictures are kept where the target format allows
PDF to images: every page becomes a JPG or PNG (several pages arrive as a ZIP)
Spreadsheets: CSV, TSV, Excel (XLSX) and JSON — convert between them, or to HTML and PDF
Audio and video converting is available when the server supports it. Old .doc/.xls files, PowerPoint (PPTX), archives and e-books are not supported yet.