How to convert MP4 to F4V
To convert MP4 to F4V, upload your MP4 file, choose F4V as the output format and press Convert. The finished F4V file is ready to save to your phone or computer in seconds, free, with no watermark and no sign-up. Your file is deleted from our server about 30 minutes after the conversion.
This free online converter turns MP4 videos into F4V files in your browser, with no software to install and no watermark. When the video and audio inside your MP4 file can be placed in F4V as they are, the streams are copied without re-encoding, which is faster and keeps the original quality. Otherwise the video is re-encoded as H.264 video with AAC audio.
What you get with MP4 to F4V
- H.264 quality inside a Flash-era container
- Plays in many legacy Adobe tools
- Efficient compared with classic FLV
- Plays on: VLC, Adobe tools and many media players
What to expect from this conversion
- Expect a file of similar size to the MP4 original.
- Flash is discontinued, so F4V files play in desktop players and legacy tools rather than in browsers.
- F4V is a legacy format. Convert to it only when an older player or device requires it, since MP4 is better for everyday use.
- The first audio track is kept. Subtitle tracks, extra audio tracks and chapters are not included in the converted file.
MP4 vs F4V
| Property | MP4 | F4V |
|---|---|---|
| Full name | MPEG-4 Part 14 | Flash MP4 Video |
| Released | 2001, ISO/IEC (MPEG) | 2007, Adobe |
| Generation | Modern | Legacy |
| Typical file size | Small | Small |
| Plays on | Windows, macOS, Android, iOS, smart TVs, game consoles and every major browser | VLC, Adobe tools and many media players |
| Best for | uploading to YouTube, Instagram, TikTok and WhatsApp; sharing a video that has to play everywhere | older Adobe Media Server setups; legacy Flash archives |
Steps to convert MP4 to F4V
- Drop your MP4 video file onto the converter, or click to choose it.
- Check that F4V is selected as the target and adjust the options if you want.
- Press Convert, then download your new F4V file when it finishes.
Tips for the best result
- Leave Fast mode on to keep the original quality whenever the streams can be copied.
- Pick a lower resolution if the file is for a phone or messaging app.
- Use Mute if you only need the picture.
Frequently asked questions
How do I convert MP4 to F4V?
Upload your MP4 file, make sure F4V is the selected target and press Convert. When the progress bar finishes, download the F4V file. No account or software is needed.
Is the MP4 to F4V converter free?
Yes. It is free, with no watermark, no sign-up and no daily limit on how many files you convert. The site is supported by ads.
Will I lose quality when converting MP4 to F4V?
Not necessarily. If the video and audio streams already fit inside F4V, they are copied without re-encoding, so quality stays identical. If the file has to be re-encoded, the High setting keeps almost all visible detail, while Small trades some detail for a smaller file.
Will the F4V file be a similar size to my MP4?
Expect a file of similar size to the MP4 original. Choosing a lower quality or resolution reduces the size further.
Which devices can play F4V files?
F4V files play on VLC, Adobe tools and many media players.
How large a file can I upload?
You can upload videos up to 500 MB. Files are deleted from the server about 30 minutes after conversion.