- 1Choose file
- 2Adjust
- 3Download
Add Subtitles to MP4 online, free
Burn in or embed SRT/VTT subtitles.
- Encrypted server job — auto-deleted in 24 h
- Free, no sign-up, no watermark
- MP4
- WebM
- MOV
- MKV
- AVI
How to use Add Subtitles · Add Subtitles — frequently asked questions
How to use Add Subtitles to MP4
- 1
Add your MP4 file
The picker on this page only accepts MP4 files.
- 2
Adjust the settings
The settings start at the Add Subtitles defaults, ready for MP4 input.
- 3
Run the tool
Press start. The job runs on the server.
- 4
Save the result
The result is delivered as MP4, MKV.
What Add Subtitles can do
- Mode: burn and embed
- Encrypted server processing; files are deleted automatically within 24 hours
- Batch processing — up to 2 files at once
- Free with no sign-up, no watermark and no daily limit
Add Subtitles — frequently asked questions
What is MP4?
The universal video container (H.264/H.265 + AAC).
Does Add Subtitles work with other formats?
Yes. The main tool also accepts MP4, WebM, MOV, MKV, AVI.
Is my file uploaded?
This tool runs on the server. Files are processed in an encrypted job and deleted automatically within 24 hours.
Are there limits?
You can add up to 2 files in one run. Server jobs accept up to 2 GB. A job can run for up to 300 seconds.
Is Add Subtitles really free?
Yes. Add Subtitles is free forever on Sada Files — no ads, no premium tier, no watermark, no daily cap that pushes you to pay. Every option on this page is available to everyone.
Do I need to sign up or create an account?
No. There is no account system at Sada Files. Open the page, drop your file, pick your options and save the result. History and saved workflows stay on your device.
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