BYTETOOLS

Video Fade In and Out

Fade a video in from black at the start and out at the end, with matching audio fades. The out point is worked out from the clip length for you, with no upload.

Drop a video here or click to browseThe fade is rendered on your own device and never uploaded.

What is the Video Fade In and Out?

The ByteTools Video Fade In and Out tool adds the two transitions almost every clip needs: a gentle fade up from black at the beginning and a fade down at the end.

  • Fade-out start point calculated automatically from the clip length
  • Matching audio fades so the sound does not cut off abruptly
  • Fade to black or to white
  • Warns clearly when the two fades are longer than the clip
  • Works on clips with or without a soundtrack
  • 100% local processing — your video is never uploaded

How to use the Video Fade In and Out

  1. 1

    Drop a video onto the box or click to browse for one.

  2. 2

    Enter the fade-in and fade-out lengths in seconds; use 0 to skip either one.

  3. 3

    Choose black or white as the fade colour and decide whether the sound should fade too.

  4. 4

    Check the clip length and the calculated fade-out start point shown below.

  5. 5

    Click Add fades, then preview the result and download the MP4.

About the Video Fade In and Out

The ByteTools Video Fade In and Out tool adds the two transitions almost every clip needs: a gentle fade up from black at the beginning and a fade down at the end. You give it the two durations in seconds and it reads the clip's length from your browser to work out exactly where the closing fade has to start.

The sound is faded with the picture by default, so a clip does not cut off mid-note, and you can choose white instead of black for the fade colour when you are cutting into a light-coloured presentation. If your two fades add up to more than the clip's length, the tool says so instead of producing a video that fades out before it has finished fading in.

Everything runs 100% locally in your browser through a WebAssembly build of ffmpeg. Your video is never uploaded to a server. Adding a fade means re-encoding the picture, so a long or high-resolution clip takes real time on your own hardware — the progress bar is honest about how far along it is.

Frequently asked questions

How long should a video fade in and out be?

One to two seconds suits most videos. Half a second reads as a quick, modern cut, while three seconds or more feels deliberately cinematic and is best saved for the very end of a longer piece.

Does this fade the audio as well as the picture?

Yes, by default. The Fade the sound in and out option applies matching audio fades over the same durations, so music and speech ramp up and down with the image instead of stopping dead. Untick it if you want the sound to stay at full level.

Why does the tool say it cannot read my clip's length?

The closing fade needs to know where the video ends, and that comes from your browser's own video decoder. A few codecs and containers cannot be decoded in the browser even though ffmpeg can read them — converting the file to MP4 first solves it.

Can I fade to white instead of black?

Yes, the Fade colour setting offers both. White fades work well when the video is being cut into a light presentation or a website with a pale background, where a black fade would look like a hole in the page.

Will adding a fade re-encode my whole video?

It has to, because the fade changes actual pixel values in every frame at the start and end. The tool encodes with H.264 at a high quality setting, and the rest of the clip looks essentially identical to the source.

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