SRT and VTT both store subtitles as plain text with start and end times, so the dialogue and timing can be identical. The difference is what sits around it. VTT (WebVTT) needs a WEBVTT header, uses a dot before the milliseconds, and can position and style each cue. SRT has no header, uses a comma, and carries no positioning. Use VTT for video played in a web browser, and SRT for almost everything else, including uploads to editors and most platforms.
If a platform asks for one and you have the other, convert the file. Renaming the extension is not enough, because the header and timestamps differ.
SRT vs VTT at a glance
| Feature | SRT (SubRip) | VTT (WebVTT) |
|---|---|---|
| First line | Cue number 1 | WEBVTT header |
| Timestamp | 00:01:04,200 (comma) | 00:01:04.200 (dot) |
| Hours in timestamp | Always written | Optional when zero |
| Cue numbers | Expected | Optional |
| Positioning | Not part of the format | Line, position, size, align |
| Styling | Not standard | CSS in STYLE blocks, bold, italic, underline |
| Comments | No | NOTE blocks |
| Encoding | Usually UTF-8, older files vary | UTF-8 required |
| HTML5 video | Not supported natively | The format the track element uses |
| Best for | Editors, players, uploads | Web players, positioned captions |
What an SRT file looks like
An SRT file is a list of numbered blocks. Each block has a cue number, a timing line, one or two lines of text, and a blank line before the next block.
1
00:01:04,200 --> 00:01:06,900
We never planned to stay this long.
2
00:01:07,050 --> 00:01:09,700
The road out was closed by noon.That is the whole format. There is no header, no metadata and no official place for colors or positions. This simplicity is why almost every video editor, media player and upload form accepts SRT. If you want to open and change one by hand, see our guide on how to edit an SRT file.
What a VTT file looks like
Here is the same dialogue as a VTT file:
WEBVTT
00:01:04.200 --> 00:01:06.900
We never planned to stay this long.
00:01:07.050 --> 00:01:09.700 line:10% align:center
The road out was closed by noon.Three things changed. The file starts with WEBVTT. The milliseconds follow a dot instead of a comma. The second cue has settings after its timing that move it near the top of the frame, which is useful when a caption would cover on-screen text. Cue numbers are gone because WebVTT makes cue identifiers optional.
The W3C WebVTT specification also defines NOTE blocks for comments, STYLE blocks that hold CSS, and regions for scrolling captions. Few players support every feature, so test the result in the player you actually use.
The key differences explained
Header and timestamps
The header and the timestamp separator are the differences that break files. A browser will not load a VTT track without the WEBVTT line, and a strict SRT parser can reject dot timestamps. This is why renaming captions.vtt to captions.srt usually fails: the content is still VTT.
Positioning and styling
SRT has no standard way to place a subtitle. Some players read font tags or position codes inside SRT text, but the support is inconsistent, and YouTube's help page says it does not recognize style markup in SRT files. VTT has cue settings for position, line, size and alignment as part of the standard. If your captions need to move away from lower-third graphics, VTT is the better fit.
Browser support
The HTML track element, which adds captions to a video tag, expects WebVTT. MDN states that tracks are formatted in WebVTT. If you host video on your own site with a plain HTML5 player, you need a VTT file. Many JavaScript players also accept SRT and convert it in the browser, but VTT avoids that step.
Encoding
WebVTT requires UTF-8. SRT files made by older tools can be in another encoding, which shows up as broken accents or question marks in languages such as French, Turkish or Arabic. If an SRT file looks garbled, save it again as UTF-8 before you upload or convert it.
SRT vs VTT: which one should you use?
Pick the format for where the file is going, not for which one is "better":
- YouTube: both work. YouTube Help lists SubRip (.srt) as a basic format and WebVTT as an advanced format with positioning and limited styling (bold, italic and underline). Use SRT unless you need positioned captions.
- Your own website with an HTML5 player: VTT.
- Premiere Pro, DaVinci Resolve, Final Cut and most editors: SRT is the safe choice for import.
- VLC, MPV and desktop players: both work. SRT is more common in downloaded subtitles.
- Social platforms and course platforms (LMS): check the upload form. SRT is the most widely accepted.
- Zoom and Microsoft Teams transcripts: these download as VTT. Convert to SRT for an editor, or to plain text if you only need the words.
If you are unsure, start with SRT and keep a VTT copy for web players. Converting between them takes seconds.
How to convert VTT to SRT (or SRT to VTT)
- Open the free subtitle converter. It runs in your browser, so the file is never uploaded.
- Drop in your file. The converter reads the format from the content, so a misnamed file still works.
- Choose SRT or VTT as the output. Timing and line breaks are kept.
- Download the new file and run it through the subtitle checker to catch overlaps, long lines or fast reading speed.
One limit to know: converting VTT to SRT drops cue positions and styles, because SRT has nowhere to store them. Keep the original VTT if you might need them again. To see valid examples of both formats, download a file from our sample SRT files page.
Translating SRT and VTT files
Both formats translate the same way, because only the text changes and the timestamps stay put. Aivently's AI subtitle translator reads SRT, VTT and ASS files, keeps every timecode, and exports back to the format you started with or to another one. You can preview the first 20 lines free with no account, then review each translated line beside the source before export. For paid jobs, your first 10 minutes are free once your email is verified. The full list of import and export paths is on the supported formats page.
Frequently asked questions
Is VTT better than SRT?
Neither is better in general. VTT has more features, such as positioning, styling and comments, and it is the format HTML5 video uses. SRT is simpler and accepted by more editors, players and upload forms. Choose by destination.
Can I just rename a .vtt file to .srt?
No. The file would still have a WEBVTT header and dot timestamps, and many SRT readers will reject it or show the header as a subtitle. Convert it with a subtitle converter instead.
Does YouTube accept VTT files?
Yes. YouTube accepts both SRT and VTT caption files. YouTube Help describes WebVTT support as initial, with positioning and basic bold, italic and underline styling.
What is a VTT file from Zoom or Teams?
It is a transcript saved as WebVTT: each line of speech with its start and end time, often with the speaker's name. You can open it in a text editor, convert it to SRT for a video editor, or strip the timings to get plain text.
Will converting VTT to SRT change the timing?
No. A correct conversion keeps every start and end time and only changes the comma or dot separator and the header. Positions and styles are lost, because SRT cannot store them.