Fade Video In & Out
Processing entirely on your device — large files may take a moment.
Choose the fade length and the tool probes the video's real duration first, so the fade-out always ends exactly at the final frame — no hardcoded guess that fades to black too early or too late.
Fades are the cheapest production value there is: they make compilation intros, product clips and slideshow videos read as finished work. The audio is untouched, so music and voice continue right up to the end.
How to fade video
- 1
Select your files
Drag & drop your MP4 files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to MP4". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted MP4 file individually, or grab everything at once as a ZIP archive.
About the MP4 format
MP4 (MPEG-4 Part 14) is the universal delivery container of digital video. It wraps H.264, HEVC or AV1 video with AAC audio, and its structure — separate metadata (moov) and media atoms — is what makes streaming, seeking and fast-start playback possible. Phones, cameras, TVs, browsers and every social platform assume MP4 first.
Quality is entirely a function of the codec and bitrate chosen at encode time, so an MP4 can be a 10 Mbps HEVC master or a postage stamp. That flexibility plus total playback coverage is why nothing has displaced it in twenty years — conversion between formats almost always ends in MP4.
+Strengths
- ✓Plays on every device and platform in existence
- ✓Streaming-ready structure (fast start, seeking)
- ✓Choice of modern codecs: H.264, HEVC, AV1
!Limitations
- −Quality depends entirely on encode settings
- −HEVC variants hit licensing gaps on some platforms
Frequently asked questions
Does the audio fade too?
No — only the picture fades. If you want the audio to fade as well, extract the track, fade it, and re-merge; keeping voice crisp is usually what you want.
Which length should I choose?
0.5 s reads snappy for short clips, 1 s is the universal default, 2 s suits cinematic intros. Longer than 2 s on a short clip feels sluggish.
Can I fade only the beginning?
This page applies both — for a single-sided fade, fade the whole clip and trim the unwanted end afterwards (the trim tool is stream-copy and lossless).