Is this MOV to WEBM converter really free?

Yes. Up to 5 files at a time, no signup, no catch. The free tier adds a small watermark to image output — Pro ($9.99/mo or $49/yr) removes it, raises the file size limit to 500 MB, and unlocks unlimited batch conversion.

Are my files uploaded to a server?

No — and you can verify it yourself. Open DevTools → Network tab, then convert a file. You'll see zero upload requests. Everything runs right in your browser. We never see your files.

How long does conversion take?

Usually 1–3 seconds for a typical file. The very first conversion on a fresh page load may take 5–20 seconds while the converter engine loads — after that it's instant. Your CPU does all the work locally.

What is the file size limit?

Free: up to 10 MB per file, 5 files per batch. Pro: up to 500 MB per file, unlimited batch. If you're working with large videos or RAW photos, Pro is built for that.

Can I batch convert multiple MOV files at once?

Yes — drop multiple files at once (or Ctrl/Cmd+click to select them) and they all convert in parallel. Free accounts handle up to 5 files per batch; Pro has no limit.

How large can my video files be?

Free accounts support files up to 10 MB — enough for short clips and GIFs. Pro raises that to 500 MB, which covers most 1080p videos. For files over 1 GB, a native app like HandBrake will be faster.

Will the video lose quality during conversion?

When only the container changes (e.g., MKV → MP4 where both use H.264), there's zero quality loss — it's a lossless rewrap. When the codec changes, we encode at CRF 23, which is near-transparent for most content.

Why is WebM better than MOV for embedding on websites?

Browsers don't support MOV natively in HTML5 elements — it requires QuickTime, which Apple discontinued on Windows. WebM is a royalty-free format natively supported by Chrome, Firefox, and Edge.

Does Safari support WebM?

Safari added WebM support in macOS Big Sur and iOS 14.5. For older Safari versions, provide a MOV or MP4 fallback alongside the WebM in your element.

How private is this converter?

Completely private — by design, not policy. There is no upload endpoint. Files are processed right inside your browser tab and disappear the moment you close it. We collect only anonymous page-view counts; your file content is never seen or stored.

MOV to WebM Converter — Free, Online, No Upload

How to convert MOV to WEBM online

1
Drop your MOV file
Drag and drop your QuickTime Movie file onto the converter, or click to browse your files. You can select up to 5 at once. Nothing leaves your device — conversion happens right here in the browser.
2
Hit Convert — it happens locally
Click Convert and watch it go. There's no upload, no server queue, no waiting. The converter runs QuickTime Movie → WebM Video Format entirely in your browser tab. Most files finish in 1–3 seconds.
3
Download your WEBM
Your WebM Video Format file is ready. Click Download, or grab a ZIP if you converted a batch. Close the tab and everything disappears — no copies kept anywhere.

MOV vs WEBM: format overview

MOV

QuickTime Movie

Apple · 1991

Compression: lossy
Transparency: No

✓ High quality, preferred by Apple ecosystem
✓ Supports ProRes codec for editing
✗ Poor Windows/Android compatibility without QuickTime

WEBM

WebM Video Format

Google (On2 Technologies) · 2010

Compression: lossy
Transparency: No

✓ Royalty-free codec (VP8/VP9/AV1)
✓ Excellent web streaming support

MOV magic bytes: 00 00 00 xx 66 74 79 70 71 74

WEBM magic bytes: 1A 45 DF A3

Why convert MOV to WEBM?

You have a video from your iPhone, QuickTime screen recording, or iMovie export in MOV format, and you need to embed it on a website. The HTML5 <video> element does not support MOV — browsers have no native MOV decoder. Users who click play will see nothing. QuickTime plugin support was dropped years ago. WebM is the web's open video format: royalty-free, natively supported in Chrome, Firefox, and Edge, and increasingly supported in Safari.

WebM uses VP9 (or AV1 in newer encodings) for video and Opus for audio — both open, patent-free codecs. Web developers choose WebM for self-hosted video because it loads efficiently in browsers, works well with the HTML5 <video> tag, and doesn't require a CDN or video host. For landing page background videos, tutorial embeds, and any video that needs to play directly in a webpage, WebM is the correct format.

Converting MOV to WebM requires full transcoding — the H.264/H.265 inside the MOV is re-encoded to VP9, and the AAC audio is re-encoded to Opus. This introduces some quality loss; use the highest quality preset your file size budget allows. Note that Safari support for WebM was added in macOS Big Sur and iOS 14.5 — older Safari versions require a MOV or MP4 fallback source in the <video> element alongside the WebM.

Quality & file size: MOV to WEBM

Typical file sizes: MOV 150–500 MB → WEBM 50–200 MB.

Both MOV and WEBM use lossy compression. We transcode at high quality settings (equivalent to WEBM's recommended web quality) to minimize generational loss.

Color depth: MOV supports standard color, WEBM supports standard color.

Transparency: MOV does not support transparency. WEBM does not support transparency — transparent areas become solid white.

Frequently asked questions

Privacy: how FormatDrop handles your files

Your MOVfiles are converted 100% inside your browser. They are never uploaded to our servers, never stored, and never seen by anyone other than you. This isn't a privacy policy claim — it's an architectural guarantee: our server has no endpoint that receives file bytes.