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Free Online Subtitle Editor

Watch your video and type, time and correct subtitles line by line, all inside your browser.

More tools
Subtitle formatsSRT to TextASS to SRTVTT to SRTSRT to VTTSBV to SRTLRC to SRTDFXP to SRTSMI to SRT

or drop files here

Accepts SRT, VTT, ASS

Runs in your browser. Your files never leave your device.

About Subtitle Editor

Subtitle Editor is for making or fixing subtitles while you watch: captioning your own video, correcting a machine transcript, fixing a few mistimed lines in a download. Open a video and it plays right in the page, with the current subtitle shown over the picture; open an SRT, VTT or ASS file, or start from nothing.

Keyboard shortcuts keep it quick: Space plays and pauses, N adds a line at the current moment, [ and ] set the selected line's start and end, and Ctrl+Enter adds the next line as you type. Split and Merge with next reshape lines, Shift all by moves everything at once, and overlapping lines turn red. Save as SRT, VTT, ASS or TXT. Nothing is uploaded, and your work is kept in the browser.

How to use Subtitle Editor

  1. 1
    Open your video

    Click Open video in the Subtitle Editor; the file plays in the page and never leaves your device.

  2. 2
    Open or start subtitles

    Click Open subtitles for an SRT, VTT or ASS file, or press N to add the first line.

  3. 3
    Type and time lines

    Use [ and ] to set start and end while the video plays, and fix the text in each row.

  4. 4
    Save your subtitles

    Click SRT, VTT, ASS or TXT to download the file in that format.

Why use Cubfile for this

  • Video and text side by side

    The current line appears over the video, and the list follows playback.

  • Built for the keyboard

    Space, N, [ and ] let you caption a whole clip without reaching for the mouse.

  • Mistakes flagged

    Lines that overlap the next one or end before they start are marked red.

  • Private and autosaved

    Video and subtitles stay on your device, and unfinished work waits in the browser for 14 days.

FAQ

Subtitle Editor: questions and answers

Does the Subtitle Editor upload my video?
No. The video plays from your own device and the subtitles are edited in your browser. Nothing is sent to our servers, and it doesn't use any daily tasks.
Which formats can the Subtitle Editor open and save?
It opens SRT, VTT, ASS and SSA files and saves SRT, VTT, ASS or plain TXT. ASS styling tags are removed when a file is opened, so styled subtitles come back with a simple default style. To edit subtitles embedded in an MKV or MP4, save them as a file first with Extract Subtitles from Video.
How do I time subtitles quickly?
Play the video, press N when someone starts speaking, type the line, and press ] when they stop. Adjust any start with or by typing a new time like 00:01:23,500. When a whole file drifts further out of sync over time, [Shift Subtitles can stretch it to fit between two lines.
What happens if I close the tab?
Your lines are saved in this browser as you work. Open the editor again within 14 days and you'll be offered to continue where you left off.
Is there a limit on video length?
No fixed one. Nothing is uploaded, so the only limits are what your browser can play and your device's memory.
Share Subtitle Editor with a friendIt runs in any browser, and they can try it without signing up.

Related tools

SRTTXT SRT to TextTurn subtitles into a readable transcript, with or without timecodes.
ASSSRT ASS to SRTConvert ASS/SSA subtitles to SRT, styling tags cleaned.
DFXPSRT DFXP to SRTConvert DFXP/TTML captions to SRT.
LRCSRT LRC to SRTTurn LRC lyrics into SRT subtitles, and back.
SRT Merge SubtitlesCombine two subtitle files into one bilingual subtitle.
SBVSRT SBV to SRTConvert YouTube SBV captions to SRT.
SRT Shift SubtitlesMove subtitles earlier or later, or fix drift between two points.
UTFSRT Fix Garbled SubtitlesDetect the encoding of garbled subtitles and save them as UTF-8.