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Online SRT Editor

Open a caption file and your video, fix the words and timings while the captions play over it, and export SRT or VTT. The video plays muted and never leaves your device.

Pick a video to preview captions over it
I tried every serum on my shelf

or drop it here

Opens on your device. Your file never leaves it.

or drop it here

Opens on your device. Your file never leaves it.

  1. 2.40 s
  2. 2.70 s
  3. 2.70 s

Edits stay in this tab. Download before you close it. The preview uses a plain caption style; your player or app decides the final look.

Free, no sign-up. Runs in your browser; nothing you type is sent anywhere.

Skip the caption editing.

Mimic times captions to every word of your clip, styled and kept in the safe zones. Change any line by typing.

Get started

How to edit captions

  1. 1

    Open your captions and video

    Pick an .srt or .vtt and the video it belongs to. Without a video you can still edit text and times.

  2. 2

    Play or scrub

    The caption showing now is highlighted in the list and drawn over the video.

  3. 3

    Fix the text

    Type straight into each caption. Press Enter for a second line.

  4. 4

    Fix the timing

    Edit start and end as h:mm:ss,mmm, or pause on the right moment and tap Start = or End =.

  5. 5

    Export

    Download SRT or VTT, or copy the SRT to paste anywhere.

Timing rules worth following

Netflix's timed text guides are a good reference even for short-form video: no caption shorter than 20 frames (about 0.8 s), at least 2 frames between captions, and no more than 20 characters per second of screen time for adult viewers.

RuleNetflix guidance
Shortest caption20 frames (4/5 s)
Gap between captionsAt least 2 frames
Reading speed (adult)Up to 20 characters per second
Line length42 characters, 2 lines max

Worked example

Caption 2 appears a beat before you say it.

Scrub to where you start the line, pause, tap Start = 0:02.650. Then scrub to the end of the line and tap End =.

Overlaps with caption 1 are flagged at the top until you fix them; Sort by time puts any moved caption back in order.

Sources

Questions

Can I edit an SRT file online for free?

Yes. No account, no watermark, no upload: the file is edited in your browser and downloaded back to your device.

Is my video uploaded?

No. It plays from your device in this tab, muted.

Why is the video muted?

So the page never makes a sound on its own. Read the captions against the speaker's lips, or play the original with sound in another app alongside.

Are my edits saved?

Only in this tab. Download your SRT before closing or refreshing.

Can I convert to VTT here?

Yes, use the .vtt button. The SRT to VTT converter also goes the other way.