What subtitle formats are supported?
Upload a standard SRT or VTT subtitle file alongside your video to mux it in.
Video
Add Subtitles
ToolerWork in-browser utility
Add Subtitles helps you finish the current video task faster with a browser-first workflow and cleaner output.
No signupBrowser firstMobile friendlyPrivacy-first
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Browser-based · Free
Video Tools
Add Subtitles to Video Online Free
Upload a video and a subtitle file, then download the video with subtitles muxed in.
Live preview
Select media file to show live preview here.
Showing selected input preview before processing.
Input
Drop your media file here
or drag and drop here
Supports: video/*
Files are processed securely in your browser. Nothing is uploaded.
Subtitle file
No subtitle selected · SRT or VTT
Run
Processing happens in your browser using FFmpeg WASM. Large files may take more time and memory.
Status0%
Idle
Input size: -
Related video workflows
Add Subtitles to Video Online Free — FAQ
Is this subtitle tool free?
Yes. Adding subtitles is completely free, with no signup and no watermark.
Are my files uploaded to a server?
No. The video and subtitle file are combined locally in your browser using FFmpeg WebAssembly.
What video format do I get back?
The result downloads as an MP4 file with the subtitle track included.
About this tool
Add Subtitles
Add Subtitles helps you complete video workflows faster with clean browser-based output.
Add Subtitles is a focused video utility built for users who need fast video tasks without complex setup. The workflow accepts video source input and produces video processed result through a clean browser interface that is easy to understand for first-time users and still efficient for frequent users. Instead of switching between multiple apps, this tool keeps key controls in one place so you can complete the task faster, validate the output, and move to the next step with minimal friction. It is designed for practical day-to-day execution, including office work, study tasks, content operations, and lightweight professional workflows where speed and clarity matter. You can use it from desktop or mobile, apply settings based on your use case, and export reliable output with consistent quality. For most scenarios, this approach offers faster turnaround and less operational overhead than manual workflows. Add Subtitles is practical for individual users and teams that want quick results, predictable behavior, and a no-signup workflow that saves both time and effort. Add Subtitles helps users finish video tasks with less friction and better consistency. Add Subtitles helps users finish video tasks with less friction and better consistency. Add Subtitles helps users finish video tasks with less friction and better consistency.
Best for
fast video tasks
Input
video source input
Output
video processed result
How to use this tool
- Upload video or audio source file.
- Adjust conversion, trim, resize, or compression settings.
- Run browser processing and monitor progress.
- Download output and verify playback quality.
Why users choose this tool
- Focused workflow for fast video tasks.
- Client-side FFmpeg workflow with no account requirement.
- Single interface for conversion, compression, and editing actions.
- Useful for creators, students, and daily media operations.
- Reliable video processed result generation with fewer manual steps.
Common use cases
- Add Subtitles for daily video tasks with fast browser execution.
- Add Subtitles for mobile-friendly workflows when quick output is needed.
- Add Subtitles for no-signup usage where privacy and speed are both important.
- Add Subtitles for repeat workflows where consistent output quality is important.
When to choose this tool
Add Subtitles is usually faster than manual video workflows because it reduces repetitive steps and keeps the complete flow in one interface. Compared with heavyweight desktop software, this tool prioritizes speed, accessibility, and simpler controls so users can finish routine tasks quickly without installation or licensing friction. For users who mainly need fast video tasks, this focused approach often gives better execution speed and cleaner day-to-day usability, while still producing video processed result that is suitable for practical work.
Privacy-first: Where browser-based processing is available, your files stay on your device. No file is uploaded to our servers unless strictly required for the tool to function.
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