Free online video converter for MP4, MOV, GIF and more
A useful video converter should make a technical media task straightforward. This free online video converter helps you change a video format, prepare a recording for another device, reduce compatibility problems, create an animated GIF, or extract audio without installing unfamiliar desktop software. Select a file, choose an output format and allow the browser to create a separate converted copy. Your original video is not overwritten.
The tool supports familiar formats such as MP4, MOV, AVI, MKV and WebM as well as camera, television, broadcast and older web formats. It is designed for ordinary personal, office, educational and website media. Processing happens in your browser using a locally supplied WebAssembly version of FFmpeg. This means the selected video is not intentionally uploaded to this website or a remote conversion service.
How to convert a video online
Press Choose video or drag a file into the selection area. Once the file name and size appear, select the format you want to create. MP4 is the best general-purpose option. GIF is suitable for a short silent animation. MOV can be useful in Apple and editing workflows, while WebM is designed for modern web delivery. MKV and AVI are available for compatible desktop applications, and MP3 extracts the audio track.
Choose Balanced quality for most tasks. High quality keeps more detail but creates a larger file and requires more processing time. Smaller file applies stronger compression for easier uploading and messaging. You can keep the source resolution or limit the output to 1080p, 720p, 480p or 360p. Reducing resolution is often the most effective way to make a video smaller.
Press Convert video and keep the browser tab open. The first conversion takes additional time while the local media engine starts. Progress then reflects the work reported by the encoder. When processing finishes, use the download button to save the new file. Watch the downloaded result before removing your original because every source, codec and browser environment can behave differently.
Why MP4 is the most practical output
MP4 is widely supported by browsers, mobile phones, tablets, smart televisions, presentation software, learning systems and social platforms. A compatibility-focused MP4 normally combines H.264 video with AAC audio. This combination gives good picture quality, manageable file size and reliable playback across current devices. Converting an uncommon container to MP4 often resolves upload or playback errors.
An MP4 converter is helpful when a camera records MTS or M2TS, an editor exports MOV, a screen recorder creates WebM, or an archive contains AVI or MKV. Converting does not improve a poor source. A blurry or heavily compressed original remains limited by the visual information it contains. For the best result, begin with the highest-quality original available and avoid repeatedly converting the same lossy file.
How MOV to MP4 conversion helps
MOV is strongly associated with Apple QuickTime, iPhones, cameras and professional editing applications. It is a flexible container that may contain several different codecs. A particular MOV file can work on one device but fail on another if the second device does not recognise its internal video or audio stream. MOV to MP4 conversion creates a more broadly accepted delivery copy.
Select your MOV, choose MP4, and use Balanced or High quality. Keep the original resolution for an ordinary phone clip. If a 4K recording is intended only for a website or presentation, limiting it to 1080p or 720p can save considerable space. Preserve the original MOV as a master when you might edit the footage later. Browser conversion is intended for convenient delivery copies rather than professional mastering.
Creating an animated GIF from video
A video-to-GIF converter stores a sequence of frames as a looping animated image. GIFs are useful for reactions, short demonstrations, product actions, help articles and moments that should play without a conventional video player. GIF does not support sound and has a limited colour palette, so it works best with a short source and relatively simple motion.
Long or high-resolution GIFs become very large because GIF compression is much less efficient than modern video compression. Trim the source to the important moment before conversion. A clip of three to eight seconds is normally more useful than a minute-long animation. If the result is too large, lower the resolution or use a looping MP4 or WebM instead. Those video formats preserve more colours and can be dramatically smaller.
Understanding supported video formats
A filename extension often identifies a container, not the exact codec stored inside it. MP4, MOV, AVI, MKV and WebM can each carry different video, audio, subtitles and metadata. Two files with the same extension may therefore behave differently. The converter inspects media through FFmpeg instead of trusting only the extension, but encrypted, damaged or proprietary streams may still be unsupported.
| Format family | Typical source | Suggested output |
|---|---|---|
| MTS, M2TS, MOD | Camcorders and cameras | MP4 |
| MOV, QT, M4V | Apple devices and editors | MP4 or WebM |
| MKV, AVI, DIVX, XVID | Desktop media and archives | MP4 |
| VOB, MPEG, MPG | DVD and MPEG streams | MP4 |
| WMV, ASF, DVR-MS, WTV | Windows Media and television | MP4 |
| 3GP, 3G2, 3GPP | Older mobile devices | MP4 |
Supported inputs include M2TS, MTS, MPEG, SWF, MOD, M4V, QT, RM, MPG, 3GPP, DIVX, VOB, DVR-MS, RMVB, ASF, 3G2, TS, MPV, WTV, XVID, MXF, M1V, F4P, F4V, MOV, FLV, WMV, MKV, WebM, 3GP, AVI, MP4 and OGV. An SWF containing interactive animation rather than a normal embedded video cannot be treated like an ordinary movie. Rare legacy codecs may require specialist desktop software.
Quality, resolution and file size
Resolution describes the number of pixels in each frame, but resolution alone does not determine quality. Bit rate, frame rate, codec efficiency, movement and source detail also matter. Enlarging a 480p source to 1080p increases its dimensions without creating real detail. Keep original resolution unless you deliberately want to reduce the output. For typical web playback, 720p often provides an effective balance.
High quality uses less aggressive compression and preserves more texture. Balanced quality is appropriate for most sharing. Smaller file can help meet an upload or attachment limit, although fast movement may show additional softness or blocks. Watch the final result at normal size. Text, screen recordings and animation sometimes need a higher-quality setting than ordinary camera footage because sharp edges make compression artefacts more noticeable.
Private browser-based conversion
Traditional online converters upload the selected file to a processing server. This tool runs its converter inside the browser. The FFmpeg JavaScript and WebAssembly files are delivered with the installed tool, and the selected video is read locally. The generated download is assembled locally. Closing or refreshing the page releases temporary in-memory media; the converter does not provide permanent cloud storage.
Local conversion improves privacy but transfers the computing work to your device. A modern desktop will normally outperform an older phone. Video processing can use substantial memory and battery power. Close other demanding tabs, connect a laptop to power and prevent the device from sleeping during a long job. Very large professional or 4K files remain better suited to desktop editing software.
Preparing videos for websites and mobile devices
Website video should balance clarity with fast delivery. A visitor may watch on a phone using mobile data, so uploading the largest camera original is rarely ideal. Convert a suitable copy to MP4, reduce unnecessary 4K footage to 1080p or 720p, and test playback on both desktop and mobile screens. Keep the original recording separately. The web copy can then be replaced later without losing the master. When publishing directly through a content management system, also confirm its maximum upload size before starting a long conversion.
Mobile compatibility depends on more than the words “iPhone” or “Android” in a filename. Current phones normally record MP4 or MOV using efficient codecs, but an older tablet, messaging service or editing application may not support every codec. Creating a standard MP4 delivery copy is often the simplest solution. Vertical videos retain their orientation when the resolution is kept or reduced proportionally. Avoid forcing a landscape size onto portrait footage, because that can stretch the picture or introduce unnecessary borders.
Tips for reliable conversion
Test the converter with a short file before processing an important long recording. This confirms that the local engine files were installed correctly and that the browser supports the selected input. If a conversion stops, refresh the page, close other memory-intensive tabs and try MP4 with Balanced quality. Lowering the resolution reduces both memory and processing demand. Files transferred from cameras should finish copying before selection; an incomplete or damaged source can fail during decoding even when its extension appears supported.
Use a descriptive download name and keep converted copies organised. The tool adds “converted” to distinguish the result from its source, but you can rename the file after downloading. Check the beginning, middle and end of the result, verify that audio remains synchronised, and confirm the dimensions before sharing it. Conversion is successful only when the output works for its intended viewer, website, presentation or device.
Frequently asked questions
What format should I choose?
Choose MP4 for the widest everyday compatibility. Choose GIF only for a short silent animation. Choose WebM for supported modern web workflows, MOV for a specific Apple or editing requirement, and MP3 when you only need audio.
Why can a converted file be larger?
Output size depends on codec, resolution, quality, frame rate and content. High-quality output or an inefficient legacy format may be larger than the source. Use Smaller file or reduce the resolution when size matters.
Can the converter add a watermark?
The tool does not intentionally add a watermark. It creates a converted copy from the selected input without requiring an account.
Why did a very large file fail?
Browsers have memory limits. The converter must hold the source, working data and output, so required memory can be several times the file size. Test with a smaller clip. Use desktop FFmpeg or an editor for long, high-resolution or professional media.
Does GIF contain audio?
No. GIF is an animated image format and cannot contain sound. Use MP4, MOV, WebM or another video output when audio is required.