How do I line up the clips?

Clap at the start of each recording and use Sync by clap; Jam Forge lines the clips up for you.

Yes. It is free to use, with no account, no watermark and no paywall.

Are my files uploaded?

No. It runs entirely in your browser, so your files and text stay on your device.

Free split-screen music collab and duet video maker — Jam Forge

What do you want to make?

Pick an idea to set up the layout, or just record and add clips below.

🎬 Join videos you already have

Pick the videos you made — on your phone, camera or anywhere else — and turn them into one video. Choose the order and whether they play one after another or all at once.

📂 Choose videos to joinPick several at once, or drop them here. You can add more later.

Put them in this order

How they play

Then change the order in Clips by dragging ⠿, untick In the video for any clip you want to leave out, and press Make the video.

Preview

0:00.0 / 0:00.0

Layout

Record a clip

Press Turn on camera to see yourself here.

Camera

Microphone

Name on screen

Character

Play the other clips while I record, so I can play along (use headphones, or the speakers end up in your recording) Count in: beats a minute, clicks before it starts Keep clicking the beat while I record (headphones only) Music mode: turn off echo cancelling and noise removal, so instruments sound natural

Or add clips you already have: 📂 Add video or audio files — or drop them anywhere on the page. Audio-only files get a cartoon character.

Clips

Drag ⠿ (or use ↑ ↓) to change the order, and untick In the video to leave a clip out. Start moves a clip later or earlier (in seconds). In One after another and Taking turns it is the pause before the clip — a negative number lets it start before the last one ends, like an interruption.

No clips yet. Record one above, or add video and audio files.

Make the video

Shape

Background

Space between clips

Title at the start (optional)

File type

Show names on the clips Rounded corners Show the whole picture (no cropping — good for videos of different shapes) Fade between clips in One after another Play the sound while it is being made

The video is made in real time on your device, so a 1-minute song takes about 1 minute. Keep this tab open and visible.

Tips for a great result

🎧 Playing together from different places

Record the first clip (often drums or a click track), send the idea to your friends, and each person records their part while listening to the others in headphones. Add all the clips here, then press Sync by clap.

👏 Why clap?

Every recording starts at a slightly different moment. Clap once, clearly, at the start of each clip. Jam Forge finds the clap in each sound track and lines the clips up, usually to within a hundredth of a second. Fine-tune with the ±0.05 s buttons.

💬 Conversations and sketches

Record each line as its own clip — you can play both people yourself. Choose Taking turns: everyone stays on screen and the speaker lights up. Use a small negative start to make someone interrupt.

🐸 Talking to a frog (or a robot)

Pick Voice for a cartoon, choose a character and record the voice. The character's mouth moves with the sound. Change your voice, or ask a friend, for the best effect.

🔒 Private

Your camera, clips and the finished video never leave this device. Clips are kept in this browser (IndexedDB) so a reload does not lose your takes; Remove all clips deletes them.

Jam Forge