How to use the Add Subtitles to Video tool
- Choose your video.
- Load your .srt or .vtt file, or paste the subtitle text.
- Set the size, position and background, and shift the timing if needed.
- Press Burn in subtitles and download.
About this tool
Most social platforms ignore separate subtitle files, and most people watch with the sound off, so burning subtitles into the picture is the reliable way to be understood. This tool reads standard SRT and VTT files, including timestamps in either comma or dot format, and strips basic styling tags.
You control the size, position, colour and background box, and you can shift the timing if the subtitles run early or late. The preview plays the video with the subtitles drawn on top, so you can check the sync before you render.
Why use ToolsCrow for this
- SRT and VTT. Load a file or paste the text.
- Timing offset. Fix subtitles that run early or late.
- Styled for readability. Outline plus an optional background box.
- Private. No upload of video or subtitles.
Good to know
- Burned-in subtitles cannot be switched off by the viewer or translated later. Keep the original video and the subtitle file.
- This tool does not create subtitles from speech; it needs a subtitle file or text you already have.
Frequently asked questions
Is my video uploaded to a server?
No. Everything runs inside your browser tab using your own device's video hardware. Your file is never sent to ToolsCrow or anyone else, which also means there is no waiting for an upload and it keeps working if your connection drops after the page has loaded.
Is it really free? Is there a watermark?
It is free with no sign-up, no watermark and no daily limits. The only limits are the ones your device sets: memory and processing power.
How large a video can I use?
Because the video is processed on your device, the limit is your device's memory rather than a server quota. Phone clips of several hundred MB are fine on most devices, and desktop computers usually handle 1 to 2 GB. Files over about 4 GB are not supported.
Which browsers work best?
Current Chrome, Edge and Safari (16.4 or newer, including iPhone and iPad) work best because they include the WebCodecs video engine. Recent Firefox versions work for many files. Older browsers fall back to a much slower real-time mode or may not work at all.
Does this transcribe my video automatically?
No. It burns in subtitles you already have as an SRT or VTT file. Speech recognition needs a large model that would be too heavy for a browser tool like this.
How do I fix subtitles that appear too early?
Use the "Shift timing" box: a positive number delays the subtitles, a negative one makes them appear earlier.
What is the difference between SRT and burned-in subtitles?
An SRT is a separate file the player can show or hide. Burned-in subtitles are part of the picture, so they always show, which matters on platforms that ignore subtitle files.
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