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Smart Video Converter

Convert videos between popular formats with quality controls, device presets, and browser-first privacy. No upload required.

Browser ProcessingMulti Format SupportDevice PresetsNo Upload RequiredHigh Quality Conversion

How to use

1

Drop your video

Drag a video file onto the upload zone, or click to browse. MP4, MOV, AVI, MKV, WEBM, M4V, FLV, and 3GP are all supported — anything your browser can decode.

2

Pick output format

Choose MP4 for universal compatibility, WebM for the smallest web-friendly file, or Audio Only to extract the soundtrack. The tool greys out formats your browser can't produce.

3

Choose device preset

YouTube, Instagram Reel, TikTok, WhatsApp, Telegram, Mobile, Website, or Custom. Each preset applies the right resolution, bitrate, and frame rate automatically.

4

Convert & download

Click Convert. Watch the live progress bar — encoding runs at roughly playback speed. Preview before/after side-by-side, then download the converted file.

When to convert your videos

MOV → MP4

iPhone records videos in MOV; Windows machines, Android phones, and most editors prefer MP4. One-click conversion preserves quality with universal compatibility.

Web embedding

Convert to WebM for ~30% smaller file sizes when embedding in HTML5 <video> tags. Faster page loads, lower hosting bills, same visual quality on screen.

Extract audio

Pull the soundtrack from a podcast recording, music video, or interview. Audio-only output is dramatically smaller and ideal for podcast apps and audio editors.

YouTube prep

Match YouTube's recommended upload bitrate exactly. Faster uploads, no re-encoding penalty on YouTube's end, and the cleanest possible final stream.

Messaging-ready

Squeeze videos under WhatsApp's 16 MB direct-send limit or Telegram's spec. Convert to MP4 and pick the WhatsApp or Telegram preset for one-tap compliance.

Old format archives

Convert legacy FLV, 3GP, or AVI recordings to MP4 so they play on modern devices without codec hunting. Ideal for digitising old camcorder or phone footage.

How it works

Browser-native engine

Built on the MediaRecorder + Canvas APIs in your browser. No 30 MB FFmpeg WASM download, no Cross-Origin-Embedder-Policy headers that would break other site features.

Codec detection

Probes your browser's MediaRecorder support at load time. Formats that aren't available (e.g. MP4 on Firefox) are greyed out with a clear note, so you never hit a 'doesn't work' error.

Audio extraction

When you pick Audio Only, the tool captures only the audio track from the source video stream and encodes to M4A (AAC) or WebM (Opus) based on what your browser supports.

100% browser-side

Everything happens in your tab. No upload to a server, no temporary cloud storage, no third parties involved. Close the tab and every trace of your video is gone.

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Frequently asked questions

Quick answers about this free online tool.

MP4 (H.264) is the safest universal choice — it plays on every phone, TV, browser, and social platform without issues. WebM (VP9) is the modern web-native alternative that produces ~30% smaller files at the same visual quality, ideal for website embedding and YouTube uploads. MOV is essentially the same as MP4 but originated from Apple's QuickTime; modern playback support is identical. Avoid AVI and MKV unless a specific tool requires them — they're container formats from an older era.

Any re-encoding loses some pixel-level fidelity, but at sensible bitrates the loss is invisible to a human watcher. Pick 'Maximum Quality' to keep the result indistinguishable from the original (file is only slightly smaller). 'Balanced' typically delivers 50–70% file size reduction with no noticeable change. 'Smallest Size' trades visible compression artifacts for the smallest possible file — fine for messaging apps and previews.

No. The converter uses the browser's MediaRecorder + Canvas APIs to re-encode your video entirely on your device. Your file is loaded into local memory only, processed locally, and the converted result stays in your browser until you download it. Nothing is sent to a server at any step. The 'Your videos never leave your device' badge is literal, not marketing.

Yes — and it's the most common conversion this tool is asked to perform. Upload your .mov file and select MP4 as the output format. The Smart Estimation panel will show the projected size, and the converter produces a fully compatible H.264 MP4 that plays on every device. If you're using Firefox or Safari, MP4 output may fall back to WebM; switch to Chrome or Edge for direct MP4 output.

MP4 (H.264) — no contest. Every operating system, every browser, every social network, every video player, every connected TV. WebM works almost as widely but is rejected by a handful of older iOS apps and some older smart TVs. If you only need one universal format for sharing, send MP4. If you only need one universal format for the web, WebM saves you bandwidth.

Yes — select 'Audio Only' as the output format. The tool extracts the audio track and encodes it to M4A (AAC) in Chrome and Edge, or WebM-Audio (Opus) in Firefox and Safari. Both formats are widely accepted by music players, podcast apps, and audio editors. True MP3 output isn't possible in the browser without a heavy encoding library — but M4A is functionally equivalent for almost all use cases.

Browser-based video encoding uses the MediaRecorder API, which operates at roughly playback speed — a 5-minute video takes about 5 minutes to convert. This is the trade-off for completely private, server-free conversion. The benefit: nothing is uploaded, you don't pay for cloud processing, and there's no file size limit dictated by upload bandwidth. For large videos (>500 MB) or batch conversions, desktop tools like HandBrake will be dramatically faster.

Those formats are container-level files that need FFmpeg or a similar muxer to produce reliably. Browsers don't include this functionality natively — running FFmpeg in the browser would require a 30 MB WebAssembly download plus complex cross-origin security headers that would affect other parts of the site. For these less-common formats, install HandBrake (free, all platforms) or use Adobe Media Encoder. For everyday use, MP4 and WebM cover 99% of cases — convert to MP4 for compatibility.