Online subtitle editor with video preview
Edit the text and timing of every subtitle, preview the result on your own video and save as SRT, VTT, ASS or TXT — all inside your browser.
Move subtitles by a fixed amount when every line is off by the same delay.
Seconds (2.5), milliseconds (1500ms) or a time (00:00:02,500). Subtitles appear too early → Later.
For subtitles that drift. Pick two cues far apart and enter when each should appear.
Rescale times when the subtitle was made for a video with a different frame rate.
The file open now is part 1 / language 1.
Cues
Save options
Output preview
How to online subtitle editor with video preview
- Open subtitles and video. Open the subtitle file, then optionally the video for live preview.
- Edit cues. Click a cue, change its times or text, or insert and delete lines.
- Retime by ear. Pause the video where a line starts or ends and click Start = video or End = video.
- Save. Pick SRT, VTT, ASS or TXT and download.
About this tool
Click any cue in the list to edit its start time, end time and text. Use the arrows to step through cues, insert a new line after the selected one or delete it. Times accept 00:01:02,500, 1:02.5 or plain seconds. The duration and reading speed in characters per second are shown as you type, so you can spot lines that flash by too quickly.
Load the matching video file to preview subtitles exactly as they will appear. The video plays from your disk through the browser — it is never uploaded. Clicking a cue jumps the video to it, and “Start = video” and “End = video” capture the current playback time, which is the fastest way to retime lines by ear.
Search finds cues by their text. Undo steps back through up to 50 changes, and Revert reloads the original file. When you are done, choose a format and download; the editor keeps formatting such as italics and positions when you save back to the same format.
FAQ
Is my video uploaded when I preview it?
No. The browser plays the file directly from your device using a temporary local link. Nothing is sent to a server.
Which video formats can I preview?
Whatever your browser can play: MP4 (H.264) and WebM everywhere, often MKV and HEVC in Chrome, Edge and Safari.
Can I create subtitles from scratch?
Yes. Paste or type your lines as plain text, open them, and time each one with the video using Start = video and End = video.