100% private — processing happens on your device, nothing is uploaded.
Works best with short clips (Reels, TikTok, Stories). Very large files may be slow on mobile.
By using this tool, you agree to our Terms of Use
Turn MOV, WebM, MKV, or AVI into MP4 (H.264) for Instagram, TikTok, and editing.
Extract audio as MP3 for podcasts, drafts, or offline listening—right in the browser.
No upload to our servers. Your free video converter runs locally with FFmpeg.wasm.
Most “online converters” upload your file to a remote server. That burns bandwidth, risks privacy, and often fails on large clips.
Unvidio converts on your device: pick a file, choose MP4, WebM, or MP3, and download the result. Ideal after you save a Reel or TikTok you own.
Target use cases: convert video to MP4 for social uploads, free convert video to MP4 for clients, and quick format fixes without installing desktop software.
Use only files you own or have permission to process. Processing stays on your device.
Select a local file (MP4, MOV, WebM, MKV, AVI…). Short clips work best on phones.
Choose MP4 for max compatibility, WebM for web, or MP3 to extract audio.
Click Convert, wait for the progress bar, then download your file. Nothing is uploaded.
Keep the original resolution when possible. H.264 + AAC MP4 is the safest for phones and social apps. If the file is still too large after converting, use our video compressor.
Private browser conversion only—use files you own or may lawfully process. Unvidio does not store your videos.
People search for video converter, convert video to MP4, and free video converter because they need a portable file for social, editing, or backups. This page is that tool—plus the checklist below.
MP4 with H.264 video and AAC audio plays on iOS, Android, Windows, and macOS, and uploads cleanly to Instagram, TikTok, Facebook, and YouTube.
If your camera exported MOV or your browser saved WebM, converting to MP4 usually fixes “won’t open / won’t upload” errors.
Desktop tools (HandBrake, Adobe) are great for huge files and batch jobs. For short creator clips, a free online video converter that never uploads is faster and safer for privacy.
Unvidio’s converter is browser-based: no account, no queue quota, no surprise watermarks.
Extract music beds, voiceovers, or draft audio from a video you created. MP3 is small and easy to archive.
Do not extract copyrighted commercial music you do not have rights to redistribute.
If the format is already MP4 but WhatsApp, Discord, or email rejects the size, use the video compressor. Conversion changes container/codec; compression reduces bitrate/size.
FAQ
A good free video converter keeps files private, supports MP4, and does not force signup. Unvidio converts in your browser with no upload.
Open this page, choose your file, select MP4, click Convert, then download. Prefer H.264 MP4 for phones and social apps.
Yes. Select the file, choose MP4 as output, and convert. Short clips work best on mobile browsers.
No. Audio extraction runs locally in your browser. Nothing is sent to Unvidio servers.
The tool is free to use in your browser. Limits are practical (device speed and ~200 MB recommended file size), not a paid quota.
Browsers re-encode with your CPU/GPU. Use Wi‑Fi, keep the screen on, or try a desktop browser for larger files.
Pick MP4 for social and editing. Pick WebM mainly for web embeds that already expect WebM.
This page converts local files. To get an MP4 from a public link you own, use the Unvidio downloader first, then convert if needed.