Narrate Forge
Record a voiceover over your video, in the browser. Mix and export MP4 or WebM.
Load any video, scrub to where you want your voice to start, hit Record. The video plays muted while your microphone captures a single voice take. Stop when you're done. Adjust the original-audio and voice volume sliders to taste, then render the clip with both tracks mixed into the output. Single take, single track — discard and re-record if you flub a line.
Adding a quick voiceover to a screen recording, gameplay clip, or tutorial usually means firing up Audacity, lining up a separate audio file, then exporting through a real video editor. Narrate Forge collapses that into one tab: drop the video, record, export. No editor install, no audio file juggling, no upload.
- 01Drop a video file (MP4, WebM, MOV, M4V, MKV). Plays right in the page.
- 02Scrub the playhead to where you want your voiceover to start.
- 03Hit Record. Allow microphone access the first time. The video plays muted while your mic captures.
- 04Hit Stop when you're done. The take is saved locally, no upload.
- 05Hit Play to preview — the video plays, your voice plays at the right time, both mixed.
- 06Drag the Video and Voice volume sliders until the mix sounds right.
- 07Pick MP4 or WebM, set Quality, click Render. Download the finished file.
- 08Flubbed it? Re-record wipes the take and starts over.
- Wear headphones during recording so the mic doesn't pick up the video's audio. The video is muted during the take, but room speakers will still leak.
- Render speed runs at real time — a 30 second clip takes about 30 seconds because the canvas captures live playback.
- MP4 export works in Chrome and Edge. Firefox and Safari should fall back to WebM.
- Nothing leaves your browser. The mic stream is captured in-tab, mixed in-tab, and exported in-tab. No upload, no account.
- Voice take is single-clip for v1. Multi-clip narration is planned.
Is Narrate Forge free, and does it watermark my video?
Yes, completely free. No account, no upload, no watermark on the export.
How do I add a voiceover to a video in the browser?
Drop your video into Narrate Forge, scrub to where you want your voice to start, hit Record, talk into your mic, hit Stop. Adjust the Video and Voice volume sliders, then click Render. Download the MP4 or WebM with your voiceover baked in.
Does the original video audio stay in the export?
Yes by default — both tracks are mixed. Drop the Video slider to 0 for voice only, or drop the Voice slider for the original audio without your take.
Can I re-record if I mess up?
Yes. Hit Record again (it becomes Re-record once you have a take) to wipe the old voice and start fresh.
Does this need a microphone?
Yes. Your browser asks for mic permission the first time you hit Record. If you denied it, click the camera icon in the address bar and allow microphone for astryke.com.
What output formats are supported?
MP4 (H.264 + AAC) where the browser supports it — Chrome, Edge, recent Safari — and WebM (VP9 / VP8 + Opus) everywhere. WebM is the safe default if MP4 is greyed out.
Where does my voice go?
Nowhere. The mic stream is captured locally, mixed against the video in your browser tab via Web Audio, and exported via MediaRecorder. No upload, no server, no account.
Can I do multiple voice clips on a timeline?
Not yet — v1 is one continuous take. If you flub a section, re-record the whole thing. Multi-clip narration is in the queue.
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