Getting Started · 7 min read
How to Edit a Video in Your Browser (No Software Needed)
A complete beginner's guide to editing video online without installing anything. Covers importing, trimming, effects, and exporting.
Why browser-based video editing has arrived
For most of the history of digital video, editing meant installing a large desktop application - Final Cut Pro, Premiere, or DaVinci Resolve - each requiring a capable machine, significant disk space, and often a subscription or upfront cost. That model worked for professionals but locked out the vast majority of people who just want to trim a clip or add a title.
Modern web browsers have changed this. The HTML5 Canvas API, the MediaRecorder API, and OffscreenCanvas compositing bring the core primitives of video editing directly into the browser tab. A well-built browser editor today can handle multi-track timelines, real-time filters, keyframe animation, and export to MP4 or WebM - entirely in the client, with no server involved.
For casual editors, content creators, teachers, and small businesses, this means you can edit video on any computer - even a school Chromebook or a borrowed laptop - without installing a thing and without your footage ever leaving your device.
What you'll need to get started
Browser video editing has modest requirements. You need a modern Chromium-based browser - Google Chrome or Microsoft Edge are ideal. Firefox works for editing but has limited export codec support. Safari on macOS is usable for editing but its MediaRecorder implementation is incomplete, so exporting can be unreliable.
Your computer should have at least 4 GB of RAM. Video editing is memory-intensive even in the browser, because each video track is backed by a hidden video element that the browser decodes in real time. 8 GB or more will give you noticeably smoother playback on multi-track projects.
You do not need an internet connection after the page has loaded. LuxOpus stores your project state locally in IndexedDB, so you can work offline and come back to your project later.
Importing your footage
Open the editor and you'll see an empty timeline with two default tracks - one video, one audio. To import footage, click the Import button in the toolbar at the top, or simply drag your video or audio files directly into the media pool on the left side of the screen.
LuxOpus supports any format your browser can natively decode. In practice, this means MP4 (H.264 or H.265), WebM (VP8 or VP9), and MOV files work reliably. You can also import still images - JPEG, PNG, GIF, and WebP - which appear as 5-second clips that you can trim to any length.
Once imported, your files appear in the media pool. From there, drag a clip down to any track on the timeline to place it. You can also double-click a media pool item to preview it before placing it. Clips on the timeline are non-destructive - trimming or deleting them never touches your original file.
Understanding the timeline
The timeline is the horizontal workspace at the bottom of the screen where you arrange clips in sequence. Each row is a track. Tracks stacked above one another are composited - the topmost video track renders on top of all others, like layers in a drawing application. This is how you create picture-in-picture effects, or overlay a logo image on top of your main footage.
The playhead is the vertical red line that moves through the timeline as video plays. The position of the playhead determines what you see in the preview viewport. You can click anywhere on the timeline ruler to jump to that point, or drag the playhead to scrub through your project.
The timeline has a zoom control in the top-right corner. Zooming in gives you more precision for fine-grained trimming; zooming out lets you see your whole project at once. You can also use Ctrl+Scroll (or Cmd+Scroll on Mac) to zoom with the mouse wheel while your cursor is over the timeline.
Trimming and cutting clips
Trimming adjusts the start or end point of a clip without removing footage permanently. In Select mode (press V or click the arrow tool in the toolbar), hover over the left or right edge of a clip in the timeline. A white trim handle appears. Drag it inward to trim - the clip gets shorter. Drag it outward (up to the original source length) to restore footage you previously trimmed away.
Cutting splits a clip into two separate pieces at the playhead position. Place the playhead where you want the cut, then press S to activate the Razor tool and click the clip. Alternatively, with a clip selected, press Ctrl+K (or Cmd+K) to split at the current playhead position. Each half becomes an independent clip you can move or trim separately.
To remove a section of footage, cut at the start and end of the unwanted section, then select the middle piece and press Delete or Backspace. Use Shift+Delete for ripple delete, which removes the clip and closes the gap by sliding all subsequent clips on that track to the left.
Adding effects, text, and transitions
Select any clip in the timeline and the Inspector panel opens on the right side. The Properties tab lets you adjust clip speed (0.25x to 4x), change volume, and apply color grading. The Effects tab is where you add visual filters - brightness, contrast, saturation, blur, hue rotation, grayscale, sepia, and more. Each filter has an intensity slider and you can stack multiple filters on a single clip.
To add text, go to the Effects tab with a clip selected and click Add Text Overlay. You can set the text content, font size, colour, x/y position offset, and the time range within the clip during which the text is visible. This makes it easy to add titles that fade in partway through a clip, or captions that appear only while someone is speaking.
Transitions animate the change between two consecutive clips on the same track. Select the outgoing clip, go to the Properties tab, and choose a transition from the dropdown. LuxOpus offers eight types: fade, dissolve, slide left/right, wipe left/right, and zoom in/out. Set the duration and the transition blends across both clips automatically.
Exporting your finished video
When your edit is complete, click the Export button in the top toolbar. A dialog appears where you choose your output format. WebM (VP9) works in all browsers and is the safest choice. MP4 (H.264) is the most widely compatible format for sharing and uploading to social media, but requires Chrome or Edge to export. MOV is an H.264 stream in a QuickTime container, useful for compatibility with Apple software.
Export works by playing back your entire project in real time while recording the canvas output using the MediaRecorder API. A two-minute project takes approximately two minutes to export. This is not a limitation to work around - it is simply how client-side video encoding works without access to hardware encoders. The quality is high: LuxOpus exports at 8 Mbps, which produces excellent results for most use cases.
Once the export is complete, the file downloads directly to your device. There is no server upload, no processing queue, and no email confirmation. The file is ready immediately.