Convert video files from any format to MP4 using FFmpeg with H.264 video and AAC audio, creating a universally compatible file that plays on every device, browser, and platform
Our free video converter to MP4 turns any video file into a clean, universally compatible MP4 in a couple of steps, so it plays smoothly wherever you need it. Upload your clip, let the tool do the work, and download an MP4 that opens on phones, tablets, laptops, smart TVs, and every major browser. It runs on the professional FFmpeg engine and rebuilds your video with H.264 video and AAC audio, the exact combination that plays everywhere. Whether you need to convert MKV to MP4, change a MOV from your phone, or fix an old AVI that refuses to open, this tool handles it. It is completely free, with no watermark on your video.
Converting a video to MP4 with File Tools Online takes a few quick steps, and you do not need VLC, HandBrake, or any desktop software. Everything runs online in your browser.
Drag and drop your video into the box above, or click to browse and pick the file from your device. MKV, MOV, AVI, WMV, FLV, WebM, and more are all accepted.
Start the conversion and the tool rebuilds your video as an MP4 with H.264 video and AAC audio, the format that plays on every device and platform.
Download the finished MP4 and use it anywhere. Your file is processed securely and deleted automatically within 30 minutes.
The converted MP4 keeps your original picture and sound, it is simply repackaged into a format that phones, browsers, editors, and social platforms all understand. That makes it easy to share, upload, or drop into a project without playback errors or missing audio.
Plenty of "convert to MP4" sites bury you in ads, add a watermark, or hand back a low-quality file. Ours uses FFmpeg, the same professional engine trusted inside major video software, to produce a proper MP4 with clean H.264 video and AAC audio, so your clip looks right and plays everywhere.
The MP4 output uses H.264 and AAC, the standard combination supported by phones, tablets, computers, smart TVs, and every browser.
Powered by FFmpeg, the professional-grade tool behind countless media apps, so your conversion is accurate and reliable across formats.
Convert MKV, MOV, AVI, WMV, FLV, WebM, and many more input formats into one MP4 that just works, no codec hunting required.
Convert video to MP4 free online with no trial, no watermark stamped on your footage.
Files are processed securely over an encrypted connection and automatically deleted within 30 minutes of upload.
Runs online on Windows, Mac, Linux, Chromebook, Android, and iPhone. Nothing to download and nothing to install.
MP4 is not really one thing, it is a container, a wrapper that holds a video stream and an audio stream together. What makes an MP4 play smoothly on almost anything is what goes inside that container. When you change a video format to MP4 here, the tool encodes the video stream as H.264 (also known as AVC) and the audio stream as AAC. That pairing is the closest thing the video world has to a universal standard.
The reason matters. Formats like MKV, AVI, and WMV can hold all sorts of codecs, some of which a given phone, browser, or editor simply cannot decode. That is why a file plays fine on one device and shows a black screen or "unsupported format" error on another. By rebuilding your clip as H.264 video with AAC audio inside an MP4 container, this converter removes that guesswork. The result is a file that Safari, Chrome, Firefox, and Edge play natively, that iPhone and Android open without an extra app, that uploads cleanly to YouTube, Instagram, TikTok, and Facebook, and that drops straight into editors like Premiere, DaVinci Resolve, and iMovie. One MP4 converter pass, and your video stops being picky about where it will play.
Almost every common video format can be turned into an MP4, and each conversion solves a familiar headache. Here are the ones people reach for most often.
File Tools Online offers more than 100 free tools to convert, edit, and manage your files. These are the ones people use most alongside the video converter.
This is a general video file to MP4 converter, so it accepts a wide range of common input formats and rebuilds each one into a single, standard MP4. If your file is a video, there is a good chance you can convert it here. Supported inputs include:
Whatever you upload, the output is always the same dependable MP4 with H.264 video and AAC audio, ready to play on any device.
Because this is an online video converter, it works the same on every device. There is no program to install on Windows, no app to download on Mac, and nothing to add to your phone, you use the exact same page whether you are on a laptop, a Chromebook, an Android device, or an iPhone.
That makes it easy to convert a video to MP4 on Mac, on a work computer where you cannot install software, or on your phone before posting a clip. The conversion runs on our servers with FFmpeg, so even a large video is processed reliably no matter how powerful your own device is. All you need is a browser and an internet connection, and you can change a video to MP4 from anywhere.
Yes. The videos people convert are often personal recordings, work projects, and clips they have not published yet, so security is built in. Files are uploaded over an encrypted HTTPS connection, processed on a secure server, and automatically deleted within 30 minutes. We never share, sell, or reuse your videos.
Upload your video to the tool above and start the conversion. The tool rebuilds it as an MP4 with H.264 video and AAC audio, then lets you download the file. The whole process runs online in your browser, with nothing to install.
The File Tools Online converter is free to use, with no watermark added to your footage. Just upload the video, convert it, and download the MP4.
MP4 is a container that, when paired with H.264 video and AAC audio, plays on almost every device and browser. Formats like MKV, AVI, and WMV can use codecs that many devices cannot decode, which is why converting to MP4 fixes so many playback problems.
Yes. MKV to MP4 is one of the most common conversions. Upload your MKV and the tool produces an MP4 that plays where the MKV would not. You can also use our dedicated MKV to MP4 tool.
Yes. This is a general converter that accepts MOV, AVI, WMV, FLV, WebM, and many other formats, and turns each of them into a standard MP4 with H.264 video and AAC audio.
The tool aims to preserve your original picture and sound while repackaging the file as a compatible MP4. For most videos there is no visible difference in quality, you simply get a file that plays everywhere.
Yes. Because the output uses H.264 video and AAC audio, the MP4 opens natively on both iPhone and Android, as well as on Windows, Mac, smart TVs, and every major browser.
No. This is a free online alternative to desktop converters. It runs the FFmpeg engine on our servers, so you get a proper MP4 with no paid software and nothing to install.
Exactly the same way as on any other device: open this page in your browser on your Mac, upload the video, convert it, and download the MP4. There is no separate Mac app to install.
Everyday videos convert without any hassle. Very large files may take a little longer to process, but the tool is built to handle the clips most people need to convert.
Yes. MP4 with H.264 and AAC is the recommended upload format for YouTube, Instagram, TikTok, and Facebook, so a converted file uploads cleanly and processes quickly.
Yes. Files are transferred over an encrypted connection, processed securely, and automatically deleted within 30 minutes. We never share or sell your videos.
Video comes in dozens of formats, and that variety is exactly what causes trouble. A clip recorded as MOV, downloaded as WebM, or saved as MKV may play perfectly on the device it came from and then fail everywhere else. MP4 solved that problem by becoming the format the whole industry agreed on, which is why converting a video to MP4 is one of the most common things people need to do with their footage.
A good MP4 converter does more than rename the file, it rebuilds the video and audio into codecs that every device understands. This free online tool does exactly that using FFmpeg: it converts video files from any format to MP4 with H.264 video and AAC audio, creating a universally compatible file that plays on every device, browser, and platform. It is free to use, with no watermark and no software to install. Upload your video, convert it to MP4, and download a file that is ready to play, share, upload, or edit anywhere.