Splice

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Everything you need, short. Splice runs in your browser, so there is nothing to install.

Quick startHow toTipsQuestionsPrivacy and security

Quick start

  1. Add your video. Drop it anywhere on the page, or press Choose files. MP4, MOV, WebM and MKV work, and so do pictures, MP3 and WAV. No video handy? Try or try a sample clip.
  2. Cut it. Move the red line to where you want to cut and press Cut here. Click a piece and press Delete to remove it. To shorten the start or end, use Trim start and Trim end.
  3. Polish it (optional). Use AI Tools for captions and to trim pauses. Add a + Title or + Music from the bar above the timeline.
  4. Export. Press Export, pick where you will share it (Reels, WhatsApp, Email and more), and press Export again.

Made a mistake? Press Undo or Ctrl+Z. Nothing you do is permanent until you export.

How to...

Cut out a part in the middle

Move the red line to where the unwanted part starts and press Cut here. Move to where it ends and press Cut here again. Click the piece in between and press Delete. The pieces on either side close the gap automatically.

Change speed, add fades, or adjust the look

Click a clip, then use the panel on the right. Speed gives slow motion or fast forward (the voice keeps its natural pitch). Looks gives one-click styles like Warm or B&W. Fade and transition adds fade in, fade out or a blend into the next clip. Fine-tune has blur, brightness, contrast, colour and resize.

Add captions automatically

Open AI Tools, choose the spoken language (or leave it on automatic) and press Generate. The first time, Splice downloads a speech model (about 150 MB); after that it is quick. The words are worked out on your computer, and your audio is not sent anywhere.

Nobody gets every word right. Under Edit your captions, click a line, fix the word and press Enter.

Trim the pauses, or remove "um" and "uh"

In AI Tools, press Trim pauses to cut long silences. The Shortest pause slider decides how long a silence must be. Under Clean up speech, press Find "um" and "uh", untick any you want to keep, and press Remove checked.

Add a title, name tag, music or voice-over

Move the red line, then press + Title (big text) or + Name tag (small label). + Music adds a song underneath your video. For a voice-over or a picture on top of the video, press the small + beside the Voice or On top lane in the timeline. Click any item to change its text, colour or volume.

Separate the sound from the video

Click the clip and press Separate audio. The sound moves to its own track, so you can change its volume, move it, or delete it without touching the picture.

Record my screen or webcam

Press Record, pick Screen, Webcam or both, and choose whether to include your voice. After a 3-second countdown it records. Press Stop and use and the recording lands on your timeline. Your browser asks for permission each time.

Make it fit Reels, TikTok, Shorts or a post

Pick a shape under the preview: Wide, Tall, Square or Feed. Tick Show safe zones to see where the apps cover the picture with buttons and captions, then keep your words clear of those areas. At export, choosing a place to share sets the size and quality for you.

Send it by email

Choose Email when you export. Splice makes a file small enough to attach and then offers to open your email with it ready. Set your email provider once under Settings. If the file is too big, press Make a copy under X MB.

Save my work and come back later

Press Save to make a small project file. Later, press Open and pick it. A project remembers your edits (and any captions), not your video files, so Splice asks you to choose the same video files again.

Tips

Questions

Is Splice free? Do I need an account?

It is free, with no account, no sign-in and no ads.

Which browser should I use?

The desktop version of Chrome or Edge. Other browsers may be missing the video features Splice needs, and it will tell you if so.

Can it handle 4K?

Yes, you can edit and export 4K. How fast that goes depends on your computer, and 4K files are large, so use 1080p unless you need more.

Does it work offline?

Editing and exporting need no internet once the page has loaded. Auto captions need a connection the first time, to download the speech model.

Auto captions did not start. What now?

Usually your network is blocking a download address. Open Settings, then Something not working?, then Check this computer. Show the list to your IT team. Only captions are affected; everything else still works.

My export is too big to email.

Choose Email when you export, or open More choices and use Or fit to size (MB).

I closed the tab by accident. Is my work gone?

Unsaved work is lost, because Splice keeps nothing behind (see below). Press Save now and then. Splice also warns you before you leave with unsaved changes.

Something looks wrong or broken.

Refresh the page and try again. If it keeps happening, tell whoever shared Splice with you what you did and which browser you use.

Privacy and security

Are my videos uploaded anywhere?

No. Your videos, audio, captions and projects are never sent over the internet. Everything is done on your own computer, and the exported file goes only where you save it.

Does Splice store my content or information?

Not your content. Videos and audio live in your browser's memory while you edit, and are gone when you close the tab. Splice has no server, no database, no accounts and no analytics.

Only small preferences are kept in your own browser, on your own computer:

Settings has a Reset all settings button, and clearing your browser data also removes them.

What does Splice connect to on the internet?
AddressWhy
The Splice websiteTo load the editor. Standard web logs only (such as your IP address and which page you opened).
cdn.jsdelivr.netDownloads the captions library (code only).
huggingface.coDownloads the speech model once, about 150 MB.

These are downloads only. Nothing about you or your videos is sent to them. There are no trackers or cookies.

How is that enforced, not just promised?

The website tells your browser it may only talk to the three addresses above. Anything else, such as an unknown server, is blocked by the browser itself. The site also cannot be embedded inside other websites, and the camera, microphone and screen capture are used only when you press Record, with your permission each time.

How can I check this myself?

Open Splice, press F12 and choose the Network tab. Edit a video and export it. You will see requests only to the addresses above, and none that upload your video.

What about the Email button?

Splice does not send email. It hands your exported file to your own email app, or opens your webmail, and you press Send yourself.

Has this been security audited?

It has been reviewed and tested by its builder, but not independently audited. If your organisation needs that, your security team can review it; Splice is plain files, so it is easy to inspect.

Open the editor