# Add Subtitles to Video Online - Burn SRT into the Picture

> Free online subtitle burner: load an SRT or VTT file and hardcode the captions into the video, with adjustable size, colour and outline. No missing glyphs.

- URL: https://qilingtools.com/en/video/subtitle
- Category: Video Tools (https://qilingtools.com/en/video)
- Tags: [Video](https://qilingtools.com/en/tags/video), [Subtitles](https://qilingtools.com/en/tags/subtitle)
- Last updated: 2026-10-26
- Price: Free, no sign-up
- Privacy: Runs locally in the browser; files are never uploaded

Burn SRT or WebVTT captions straight into the picture as hard subtitles, so they appear on every platform and in every player with no sidecar file. Text is rendered with the fonts on your own computer, so Chinese, Japanese and emoji never turn into empty boxes — and you can tune size, color, outline and the translucent background bar.

## How to use

1. Upload a video file
2. Pick a .srt / .vtt file, or paste the subtitle text directly
3. Adjust size, color, position and background, then click start

## Features

- SRT and WebVTT supported
- Any script and emoji render correctly
- Adjustable size, color, outline and background bar
- Automatic line wrapping to the frame width
- Captions at the bottom or the top
- FFmpeg runs locally

## FAQ

### Why do other tools turn my captions into boxes?

Most use FFmpeg's text filter, which needs the right font installed on the server and shows boxes when a glyph is missing. Here each caption is drawn to a transparent image with your own system fonts first, then composited onto the video.

### Is there a limit on the number of cues?

150 per run. Beyond that, split the video with the Trim tool, burn each half, and join them again with Merge Videos.

### Does it support ASS/SSA styling?

The text and timings are read, but effects such as karaoke timing and positioning animations are not preserved. Convert to SRT first.

### Are my files uploaded to a server?

No. Everything runs locally in your browser via WebAssembly. Files never leave your computer and are discarded when you close the page.

### Do I need to sign up or pay?

No. The site is completely free, requires no account, has no usage limits and adds no watermarks.

## Related tools

- [Compress Video](https://qilingtools.com/en/video/compress): Free online video compressor: shrink MP4, MOV and other formats with H.264 encoding and resolution scaling, at the strength you pick. Processed locally.
- [Convert Video](https://qilingtools.com/en/video/convert): Free online video converter: convert MOV, MKV, AVI, FLV, WebM and more to MP4 or WebM. Powered by FFmpeg, processed locally, no upload.
- [Trim Video](https://qilingtools.com/en/video/trim): Free online video trimmer: set start and end times to cut a clip; fast mode finishes in seconds without re-encoding. Processed locally, no upload.
- [Video to GIF](https://qilingtools.com/en/video/to-gif): Free online video to GIF converter: cut a clip and create a high-quality animated GIF with adjustable frame rate and width. Processed locally, no upload.
- [Extract Audio](https://qilingtools.com/en/video/extract-audio): Free online tool to extract audio from MP4, MOV and other videos as MP3, M4A or WAV. Processed locally, no upload.
- [Video Screenshot](https://qilingtools.com/en/video/screenshot): Free online video frame grabber: enter a timestamp and save that frame as a full-resolution PNG or JPG. Processed locally, no upload.
- [Mute Video](https://qilingtools.com/en/video/mute): Free online video muter: remove the audio track from a video in one click without re-encoding the picture. Finishes in seconds, processed locally, no upload.
- [Merge Videos](https://qilingtools.com/en/video/merge): Free online video joiner: combine several MP4, MOV or MKV clips into one file, even when their resolution and frame rate differ. Processed locally.