Convert to MP4

Use this page when the goal is simple: make a video play everywhere. Turn many source formats into an MP4 that is easier to upload, share, edit, and archive.

Drag & Drop Your Video

or click to browse — any video format

Output Format
Quality (CRF)
Trim (optional)

Convert to MP4 is the broad standardization page. It is not about one source format; it is for mixed folders and unknown files. MOV from phones, AVI from old cameras, MKV from archives, WebM from screen recorders, FLV from older web captures, and WMV from Windows systems can all end up needing the same destination: a reliable MP4.

The converter decodes the source and exports H.264 video with AAC audio in an MP4 container, the safest baseline for phones, browsers, smart TVs, learning platforms, help desks, and social networks. If your upload form rejects a file, your client cannot play it, or your media library has too many formats, MP4 is usually the first format to try.

Use trimming to convert only the useful part of a long file. Keep quality higher for videos with text, gameplay, or fast motion; lower it for simple talking-head clips or quick previews. This page is best for standardizing, while pages like MOV to MP4, MKV to MP4, and WebM to MP4 give more source-specific guidance.

Why Convert to MP4

Universal Playback Guaranteed

MP4 (H.264) plays on literally every device with a screen: smartphones, tablets, computers, smart TVs, game consoles, streaming boxes, car entertainment systems, and web browsers.

Social Media Ready

Instagram, TikTok, YouTube, Twitter/X, Facebook, LinkedIn, Pinterest. Every social platform accepts MP4. Convert any video to MP4 and it's ready to post anywhere.

Any Input Format Accepted

MOV, AVI, MKV, WebM, FLV, WMV, 3GP, MPEG, MTS. Whatever format your video is in, this tool accepts it and converts it to clean, standardized MP4.

Reduce File Size

Converting old or inefficient formats to H.264 MP4 often reduces file size by 50–70% while maintaining visual quality. Old AVI or MJPEG files benefit the most.

Future-Proof Your Videos

MP4 has been the standard for over 15 years and will remain so for the foreseeable future. Converting to MP4 ensures your videos will be playable for decades to come.

100% Private Conversion

Your video is processed entirely on your device via WebAssembly — No uploads, no cloud processing, no servers ever see your content. Complete privacy for every conversion.

Features

  • Accept any video format as input: MOV, AVI, MKV, WebM, FLV, WMV, 3GP, MPEG, MTS, and more. Output is universally compatible H.264 MP4 with AAC audio
  • Smart quality preservation analyzes your source and selects optimal encoding parameters. High-quality sources stay high quality, and file sizes are optimized automatically
  • Multi-format input support handles every common container and codec combination. The tool decodes DivX, Xvid, VP8, VP9, HEVC, MJPEG, and all FFmpeg-supported formats
  • Output MP4 plays natively on all devices: iPhone, iPad, Android, Windows, Mac, Linux, smart TVs (Samsung, LG, Sony), gaming consoles (PS5, Xbox, Switch), and web browsers
  • Optional time range trimming with HH:MM:SS timecode input. Convert just the segment you need without processing the entire file
  • Browser-based WebAssembly processing. No file uploads, no accounts required, no daily limits, complete privacy and security for all your videos

How It Works

  1. 1

    Select your video file

    Click or drag and drop any video file. MOV, AVI, MKV, WebM, FLV, WMV, 3GP, and more. If it's a video format, this tool can process it. The tool detects codecs automatically.

  2. 2

    Optional: trim the video

    If you only need a specific portion, enable trimming and set start/end timecodes. Convert just the segment you need from a longer video file.

  3. 3

    Convert to MP4 in your browser

    Click Convert. WebAssembly decodes your source and re-encodes to H.264 MP4 entirely on your device — No upload, no waiting. Progress is shown in real time.

  4. 4

    Download your MP4

    Your universal MP4 downloads automatically. Play it anywhere, upload to any platform, share with anyone. MP4 just works on everything.

Who Should Use This Tool

iPhone and Mac users converting MOV recordings to MP4 for universal sharing
Anyone with old AVI, WMV, or FLV files that won't play on modern devices
Video editors standardizing mixed-format source footage to MP4 for editing
Content creators preparing videos in any format for social media upload
Gamers converting WebM clips and MKV recordings to MP4 for sharing
Anyone with a video that 'won't play'. Converting to MP4 solves 99% of format issues

Frequently Asked Questions

What video formats can I convert to MP4?

Virtually any video format: MOV, AVI, MKV, WebM, FLV, WMV, 3GP, MPEG, MTS, M2TS, VOB, and many more. The tool uses FFmpeg's comprehensive format library. If FFmpeg can read it, this tool can convert it to MP4.

Why should I convert everything to MP4?

MP4 (H.264) is the highest-compatibility video format in existence. It plays on every device, uploads to every platform, and embeds in every website. Converting your videos to MP4 guarantees they'll work anywhere, now and in the future.

Will converting to MP4 reduce quality?

Any format conversion involves re-encoding, but at the default quality settings the visual difference is imperceptible for most content. The tool uses H.264 with standard quality parameters that balance excellent output quality with reasonable file sizes.

How much will my file size change?

It depends on the source. Old formats like MJPEG AVI or FLV often shrink by 60–80%. Files already in modern codecs (H.264, HEVC) typically stay similar in size or decrease slightly. The tool optimizes for balanced quality and size.

Can I convert iPhone MOV files to MP4?

Yes. IPhone records in MOV (sometimes with HEVC/H.265 codec). This tool converts iPhone MOV files to universally compatible H.264 MP4. Perfect for sharing with Android users, uploading to websites, or archiving.

Is there a limit on video length or file size?

No server-enforced limits since processing is entirely local. Your browser's available RAM determines the practical limit. Most modern browsers handle files up to 2–4 GB without issues. Very large files may process more slowly but will complete successfully.

Can I convert multiple files at once?

The tool processes one file at a time. However, unlike cloud converters, there's no waiting in queues. You can start the next conversion immediately after the current one finishes. For bulk conversions, convert files sequentially in the same browser session.

What makes MP4 better than other formats?

It's not necessarily technically superior. MKV is more flexible, WebM is more open, and MOV supports more pro features. MP4's advantage is universal compatibility. It's supported by every device, platform, app, and service. For sharing and playback, nothing beats MP4.

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