Tools
addfile.app

Video Editor

Cut, join, add transitions, text, music and watermarks

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Nothing is uploaded — every step runs in your browser.

A full video editor that runs in your browser. Play videos frame by frame, split them anywhere, delete or reorder the parts and add transitions such as crossfade, slide, wipe and zoom between clips. Place text and images on any range and set their opacity, font and entrance animation; add background music and adjust its volume, bass and treble tone and fades. Hide an existing watermark or logo by filling it from its surroundings, blurring or pixelating it, and add your own watermark. Your files are never uploaded.

How it works

  1. 1Choose your videos, images and music; they are added to the timeline in order.
  2. 2Step through frames in the player and press “Split” to cut; delete parts, trim their edges and add transitions. Add text, images, watermarks and music and adjust them in the side panel.
  3. 3Pick the resolution and frame rate and press “Export”; the video is created on your device and downloaded.

Frequently asked questions

Are my videos uploaded to a server?

No. Preview, editing and export all run in your browser (WebCodecs); your files never leave your device.

How do I remove a watermark?

Add a box with “Hide watermark” and drag it over the logo in the preview. “Fill from surroundings” covers the logo with the nearby colors; blur and pixelate are also available. It works best on logos that do not move.

Can I change the tone of the music?

Yes. The bass and treble sliders adjust the tone by ±12 dB, and you can set the volume, start point, fades and looping.

Which browser works best?

Recent Chrome and Edge have the widest support. Output is MP4 (H.264/AAC), or WebM where that is not available.

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