Combine a Video with a Separate Audio Track
merging a separate video and audio file into one video (coming soon). In the meantime, you can upload the video and the audio file separately, get a transcript from either one, trim what you don’t need, and export the parts you want.
If the reason you’re looking for a merger is to add your own voice to a screen recording, you may not need to merge anything at all. ScreenApp’s recorder already captures screen, window, browser tab, microphone and camera, with system audio in a single take, which covers the most common reason people go looking for a video and audio merger in the first place.
What you can do today:
- Upload video and audio files up to 2 GB each
- Get a transcript from either file, in 99 languages
- trim recordings before you export
- Export as PDF, DOCX, TXT, SRT and VTT
- no watermark on any recording or export
What You Can Do With Your Files Today
- Upload both files: Add your video and your audio file to ScreenApp separately. Each upload can be up to 2 GB.
- Transcribe and trim: Run a transcript on either file, then use trim to cut the parts you don’t need before you export.
- Export or record instead: Download what you need as PDF, DOCX, TXT, SRT and VTT, or, if you’re combining your own voice with a screen recording, use the screen recorder so the audio is already in the video from the start.
Transcript accuracy depends on the audio quality of the file you upload. See how we measure accuracy.
Video and Audio Merge Tools Compared
| Feature | ScreenApp | bravedown | OnlineConverter | Canva |
|---|---|---|---|---|
| Merges a separate audio track into a video | Coming soon | Yes | Yes | No, merges video clips only |
| Price | Free plan, paid plans from $19/month annual | Free | Free | Free tool; Pro is $144/year for one person |
| Max file size | 2 GB | 5 GB | 200 MB | Not stated |
| Watermark on free | no watermark on any recording or export | Not stated | Not stated | no watermark |
Sources, checked 2026-09-13: screenapp.io/pricing, tool.bravedown.com/merge-video-audio, onlineconverter.com/add-audio-to-video, canva.com/pricing/, canva.com/features/merge-videos/
- vs bravedown: bravedown already merges a separate audio track into a video for free, with uploads up to 5 GB. ScreenApp’s merge tool is coming soon, so upload each file separately for now.
- vs OnlineConverter: OnlineConverter adds or replaces the audio track on a video for free, up to 200 MB per file. ScreenApp doesn’t merge yet, but keeps the transcript and notes with your files while you wait.
- vs Canva: Canva’s tool stitches video clips together with no watermark, but it doesn’t add a separate audio track to a video. Canva Pro costs $144 a year for one person if you need more than the free editor.
Who Wants to Merge Video and Audio
Content creators want to add background music or a voiceover to a silent clip. Until merging ships, recording the voiceover straight into a screen recording gets the same result in one step.
Educators record a lecture or demo and want narration synced to the footage. The screen recorder already captures the microphone with the screen, so there’s nothing to combine afterward.
Marketing teams put together product demos with a separate voiceover track. They can upload both files today, get a transcript of the script, and trim it down before exporting to the video editor of their choice.
Podcasters want to turn an audio episode into a video for YouTube. Until the merge tool ships, a static-image video recorded alongside audio playback, or one of the merge tools in the comparison above, covers that job.
Video editors need a quick way to combine a rough cut with a temp audio track before deciding on the final edit. They can transcribe and trim each file separately in ScreenApp while merging is on the way.
FAQ
Can ScreenApp merge a video and an audio file?
Not yet. merging a separate video and audio file into one video (coming soon). You can upload each file separately, transcribe and trim them, and export what you need in the meantime.
Is there a free way to merge video and audio online right now?
Yes, other tools do this today. bravedown and OnlineConverter both add an audio track to a video for free (up to 5 GB and 200 MB respectively). See the comparison above for what each one offers.
How do I add my voice to a screen recording without merging afterward?
Use the ScreenApp screen recorder instead of recording video and audio separately. It captures screen, window, browser tab, microphone and camera, with system audio in one recording, so there’s no file to merge afterward.
What formats can I upload to ScreenApp today?
Video in MP4, MOV, and AVI, and audio in MP3, WAV, and FLAC, up to 2 GB per file. You can transcribe, trim, and export each one while the merge tool is being built.
Will merging video and audio be free on ScreenApp?
It will follow the same plans as the rest of ScreenApp: a free plan and paid plans from $19 a month billed annually. No date is set for the merge tool yet.
