Video editor online: trim and stitch clips — NetRoom
CAPABILITY

Video editing: stitch and trim clips

The editor works with finished clips: you put them in order, cut off the extra seconds and pick the transition for every neighboring pair. What comes out is a single MP4. The timeline takes videos you made in the service earlier and your own video files.

up to 24
clips on the timeline
3
transition types
MP4
a single output file

How it works

  1. Line up the sequence

    Add videos from the library or drag them onto the timeline. You reorder by dragging or with the arrow keys, remove a clip from its own card, and undo or redo any of it.

  2. Cut off the extra

    Each clip gets a start and an end point on the filmstrip. The browser re-encodes nothing: it only remembers the seconds you chose. The trim itself runs on the server from the source file and lands exactly on the boundaries you set.

  3. Pick the transitions

    Every joint has its own treatment: a hard cut, a crossfade with a smooth blend, or a generated bridge when a suitable model is available. The same type and length can be applied to every joint at once.

  4. Collect the finished reel

    During the build you see a progress percentage, and if you leave the screen and come back, tracking resumes. The result arrives as one MP4: you can download it from a direct link and find it in the library.

What it does

Input
Video from the service library and video files you upload
Clips per project
From 2 to 24
Trimming
Start and end points on the filmstrip, a fragment of up to 60 seconds; cut on the server exactly on the chosen seconds
Transition types
Cut, crossfade, and a generated bridge built from the last frame of the previous clip and the first frame of the next
Crossfade
A smooth fade from 0.5 to 2 seconds; audio is blended when both clips have a track
Transition description
For a generated bridge — up to 500 characters on what should happen inside the transition
Mixed clips
Clips with different frame sizes or frame rates are brought to shared parameters before stitching
Output
One MP4 file: a direct download link and a card in the library
Where to find it
A section of the Studio; a video can be sent to the editor straight from its card in the library

What people use it for

One reel out of several generations

Scenes generated separately line up into a single sequence and come out as one file rather than a set of fragments.

Trimming by the second without installing an editor

The filmstrip shows exactly where to cut; on the server the file is cut precisely on the chosen boundaries rather than at the nearest keyframes.

A smooth join between two scenes

A crossfade of 0.5 to 2 seconds removes the hard jump between shots. Set it once and apply it to every joint in the reel with one button.

A link between scenes that was never filmed

When the catalog has a model that works from a first and last frame, a short bridge can be generated instead of a plain cut, with its content described in words.

Models for this task

Full catalog
Video
ByteDance Seedance 2.0 Mini
Compact Seedance 2.0 variant for faster, lighter multimodal video generation — T2V, I2V, V2V, synced audio
5 s clip from $0.44$0.09 / sec
Video
FLUX 3 Video
Black Forest Labs multimodal video model with synced audio: 5-20s clips across text, image and video-to-video
5 s clip from $1.03$0.21 / sec
Video
FLUX Video Upscale
Black Forest Labs video upscaler to 1080p, 2K or 4K: clips up to 20s and 50 MB, 1.5x-3x, precise and creative modes
5 s clip from $0.90$0.18 / sec
Video
Gemini Omni Flash 1.1
Google multimodal video model: 3-10s clips with native audio, up to 4K, scene extension to 30s and image plus video references
6 s clip from $0.72$0.12 / sec
Video
Grok Imagine Video
xAI video model with native synced audio: text, image or video to video, 480p or 720p, up to 15 seconds
6 s clip from $0.36$0.06 / sec
Video
Grok Imagine Video 1.5 Lite
Faster, lower-cost Grok Imagine Video 1.5: text-to-video and image-to-video at 480p/720p/1080p, 1-15s clips with native audio
6 s clip from $0.14$0.02 / sec
Video
HeyGen Avatar IV
Lifelike talking avatars from a single photo, driven by text or your own audio
10 s clip from $1.20$0.12 / sec
Video
Kling VIDEO 3.0 Pro
Pro tier of Kling 3.0: 1080p with audio, motion sync and consistent characters
5 s clip from $0.67$0.13 / sec
Video
Kling VIDEO 3.0 Standard
Affordable tier of Kling 3.0: 1080p with audio and motion sync
5 s clip from $0.50$0.1 / sec
Video
Kling VIDEO O3 Pro
Kling flagship video model: 1080p, first and last frame control, image-to-video
5 s clip from $0.67$0.13 / sec
Video
Kling VIDEO O3 Standard
Standard tier of Kling O3: the balance of quality and price
5 s clip from $0.50$0.1 / sec
Video
MiniMax H3
MiniMax multimodal video model with native synced audio: 5-15s clips up to 1440p from text, images, video and audio
5 s clip from $0.48$0.1 / sec

Frequently asked questions

How many clips can I stitch at once?

From two to twenty-four in one project. The order is set by dragging, and each neighboring pair gets its own transition.

How precise is the trimming?

Precise to the second. You mark the start and the end on the filmstrip, and the file is cut on the server exactly on those boundaries. The fragment you select can be up to 60 seconds long.

How do I make a smooth transition between two videos?

Pick a crossfade at the joint and set a length from 0.5 to 2 seconds — the picture flows across and the audio blends when both clips have it. If you need an insert between scenes rather than a transition, there is the generated bridge: it is built from the last frame of one clip and the first frame of the other.

Which clip sets the format of the finished reel?

The first clip on the timeline: the rest are brought to its frame size and frame rate. To get the geometry you want, put the clip with that format first.

What does editing cost?

Trimming and stitching are not billed. Only generated transitions are paid for: each counts as a normal video generation at the price of the model you picked.

How is the editor different from the storyboard?

The editor works with clips that already exist: it cuts them and joins them. The storyboard builds a reel out of separate frames, animating each one into its own video.

Try it on your own task

A starting balance is already on your account, no card required. You pay only for what you generate.