Add subtitles to video
Choose your video and subtitle files and set the text size and position. The tool plays the video, draws the subtitles onto every frame and saves a new file.
Free · no sign-up · your file is processed in your browser and never sent to a server
How to use
- Choose your filesAdd your video and your SRT, VTT or ASS subtitles. Both stay on your computer.
- Set the lookChoose the text size, the position (bottom or top) and whether to put a dark box behind the text.
- Record and downloadClick "Burn in subtitles". It takes as long as the video; when it's done, watch the result and download it.
How it works, and its limits
Your browser plays the video from start to finish in real time, draws each frame onto a canvas with the subtitle on top and records the picture and sound again. So a 3-minute video takes about 3 minutes, and the tab must stay open and in the foreground meanwhile. It's designed for short videos (up to 10 minutes and 500 MB recommended).
- The output is WebM in Chrome, Edge and Firefox and MP4 in Safari. WebM plays on YouTube, in browsers and in most players.
- The picture is scaled to at most 1920 pixels wide; the frame rate depends on your browser and your computer.
- Burned-in subtitles can't be turned off later. For subtitles viewers can switch on and off, upload the SRT file together with the video.
For long videos or batch work, the Voiser Video studio and Transcription studio are a better fit. No subtitles yet? Create them first with the subtitle generator.
Common questions
Is my video uploaded to a server?
No. The video is played and re-recorded in your browser; no file is sent.
Why do I wait as long as the video?
Encoding in the browser happens in real time: each frame is drawn while the video plays. Keep the tab open and in the foreground.
Can I get an MP4?
Safari records MP4 directly. Chrome and Firefox produce WebM; if you need MP4, convert the WebM file with a video converter.
Which subtitle formats can I use?
SRT, VTT, ASS, SSA and SBV. ASS styles aren't applied; text is drawn using the size and position chosen on this page.
Does the audio quality change?
The audio is re-encoded (Opus or AAC). For speech and music the difference is usually inaudible.
Related tools
- Subtitle generatorCreate SRT and VTT subtitle files from video automatically.
- Online subtitle editorEdit subtitle lines alongside your video and download in any format.
- Subtitle time shift and syncShift late or early subtitles, or sync them with two points.
- Subtitle converterConvert between SRT, VTT, ASS, SBV and TXT in your browser.
- Extract audio from videoSave the audio track of your own videos as MP3, M4A or WAV.
Move to the studio for more.
Long files, saved projects and advanced export are in the studios. Start with a free account.