Video Fade In/Out

About Video Fade In/Out

This online video fade effect tool allows you to add professional fade in and fade out transitions to your videos directly in your browser. Create smooth, cinematic transitions with customizable duration. All processing happens locally for complete privacy.

What video formats are supported?

Input: MP4, WebM, MOV, M4V, AVI, MKV, WMV, FLV, 3GP, OGV, MPEG and other common formats decoded by FFmpeg. Output: keep the same format (re-muxed to a web-safe container) or convert to MP4, WebM, or MOV.

How do I add fade effects to my video?

Upload your video, enable Fade In and/or Fade Out, adjust the duration for each effect (0.1-10 seconds), choose whether to fade video, audio, or both, then click 'Apply Fade Effect'. You can preview the result before downloading.

What is the file size limit?

The maximum file size is 100MB. This ensures smooth processing in your browser. For larger videos, consider using desktop video editing software.

What is the difference between fade types?

Both Video & Audio: Fades both visual and sound. Video Only: Only the picture fades while audio stays constant. Audio Only: Only sound fades while video stays constant. Choose based on your creative needs.

How long should my fade duration be?

Typical fade durations: 0.5-1 second for quick transitions, 2-3 seconds for smooth cinematic fades, 5+ seconds for dramatic slow fades. Adjust based on your video length and style.

Can I use only fade in or only fade out?

Yes! You can enable/disable fade in and fade out independently. Use fade in to smoothly start your video, fade out to smoothly end it, or use both for a polished professional look.

Will video quality be affected?

You control the quality with the Output Quality (CRF) selector. The video is re-encoded with FFmpeg, so quality loss is minimal at lower CRF values. This tool uses FFmpeg for professional-grade video processing.

Which codec and container should I choose (MP4 vs WebM)?

Containers require matching codecs. MP4 and MOV output use H.264 video + AAC audio and add '-movflags +faststart' so the file streams and plays while it is still downloading. WebM output uses VP9 video + Opus audio, since the WebM muxer cannot hold H.264/AAC. Pick MP4 for the widest device and browser compatibility, or WebM for an open, web-optimized format.

How do CRF quality and file size relate?

CRF (Constant Rate Factor) sets the quality target: lower CRF means higher quality and a larger file, higher CRF means smaller files with more compression. Visually Lossless (CRF 18) is great for masters, Balanced (CRF 23) suits most uploads, and Small / Web (CRF 28) makes lightweight proxies. The Encode Speed (preset) trades encoding time for compression efficiency without changing the CRF target.

Is my video file safe?

Absolutely! All video processing happens directly in your browser using FFmpeg.wasm (WebAssembly). Your video file is never uploaded to any server. Everything stays private on your device.

Why does FFmpeg take time to load initially?

FFmpeg.wasm is a powerful video processing library (about 30MB) that runs in your browser. It only needs to load once per session. After loading, all fade effects will be fast and efficient.

How long does processing take?

Processing time depends on your video length, fade settings, and device performance. A typical 1-minute video takes 15-45 seconds. Longer videos or slower devices may take more time.