Convert SRT and VTT subtitles
Players disagree on caption formats. Convert the text track without dragging cues off the dialogue.
Upload an .srt or .vtt file and convert between SubRip and WebVTT formats instantly.
Server processing — files deleted after job
Convert subtitles
Upload .srt or .vtt and choose the target format.
Drop .srt or .vtt or click to browse
Both directions
Convert SRT to VTT for HTML5 video or VTT back to SRT for editors.
Pure text transform
No re-timing — cue text and timestamps are preserved accurately.
Instant download
Get the converted subtitle file immediately with no account required.
SRT versus VTT in plain terms
SRT is a classic subtitle file used by many desktop players. VTT is common on the web and in HTML5 tracks. Same job, different wrapping.
This converter rewrites the wrapper and keeps cue start/end times aligned with the dialogue you already timed.
It does not auto-transcribe video. You bring an existing subtitle file.
Why timings must not drift
A half-second shift makes captions feel late or early. Good conversion preserves timestamps.
After download, spot-check three places: opening line, a mid dialogue burst, and the final cue.
If someone re-encoded the video to a different length, fix captions in an editor—format conversion will not magically retimed mismatched media.
How to convert here
Upload the SRT or VTT. Choose the output format. Download and attach the track in your player or course platform.
Keep UTF-8 encoding in mind for non-English captions so characters do not mojibake.
Name files with language codes: lesson-01.en.vtt.
- Spot-check opening, middle, and end cues.
- Preserve language code in filenames.
- Do not retitle cues into a different video length without retime.
Formatting quirks
Some VTT styling features do not exist in SRT and will flatten. That is expected when going VTT→SRT.
Positioning tags may be simplified. Verify critical on-screen placements for accessibility-critical content.
Blank cues and overlapping cues in the source remain problems in the output—clean sources convert cleanly.
Course platforms and players
LMS tools often demand VTT. Desktop archives often ship SRT. Convert to match the destination.
Burned-in captions inside the video picture are not this file—those need video editing.
Multiple languages mean multiple files, not one merged mystery track.
Free use on Vidzilla
Subtitle conversion is free within tool limits. Keep the downloaded track beside the video.
Success is a caption file that syncs in the target player.
If cues look early/late on a new encode, retime in a subtitle editor rather than converting again.
Accessibility notes
Accurate captions help deaf and hard-of-hearing viewers and anyone watching without sound.
Format conversion supports delivery; quality of the wording is still on the author.
Provide a second language file when your audience needs it—do not rely on auto-translate inside the converter.
Before you close this Convert SRT and VTT subtitles tab, open the saved file on your device and confirm it matches the source you intended to keep for the long term.
Rename the download into a project folder with a clear date and topic so cleanup tools do not treat it as temporary browser junk later.
If a step failed, fix the input type, format, or URL first rather than repeating the same broken upload or paste and expecting a different result.
Vidzilla removes working server copies after processing on the ordinary path; the lasting result is always the file your browser wrote to disk.
Free tool use stays within published daily counts and size limits; Pro raises those limits when you regularly need more headroom for larger jobs.
Keep an original master beside any converted, compressed, or stripped copy until every destination you care about accepts the new file.
On a phone, leave this tab in the foreground until the download indicator finishes writing, then move the file out of temporary download storage.
On a desktop, spot-check duration, page count, resolution, or loudness once in a second app before you delete the source copy.
When sharing the result, send only the cleaned or converted copy—not a mixed folder of half-finished exports that confuse the next person.
If Analyze or conversion returns empty, the input is private, unsupported, damaged, or the wrong type; confirm it opens locally in another program first.
Batch work goes faster when you name files with dates, SKUs, or topics before you start the next item so the folder stays searchable.
Success means bytes on disk that open correctly for the job, not a progress spinner that never produced a downloadable file.
If a portal rejects the output for size, compress or split after you confirm quality—not before you have inspected a readable copy.
Rights still belong to creators and publishers; a file on your device is not a redistribution licence for someone else’s work.
Prefer ordinary formats recipients already open: PDF for packets, MP4 for clips, MP3 or M4A for audio, JPG or PNG for stills.
When two tools could finish the job, pick the one that matches the destination’s required extension instead of converting twice for no reason.
Log the URL or source filename beside the download when you may need to prove what you saved and when you saved it.
Close extra browser tabs that compete for uploads on a slow connection so this transfer can finish without stalling halfway.
After a successful save, remove only the temporary working copies you no longer need—never delete the last known-good master by accident.
Broadcasters sometimes demand specific frame rate assumptions in caption packages. Confirm whether your delivery spec wants drop-frame style stamps or plain seconds before you convert a season of episodes.
Questions about subtitle conversion
Will times shift?
They should not. Spot-check after download. If the video length changed, retime separately. File the approved output beside the project brief so the next person inherits context without reopening chat history.
SRT to VTT and back?
Yes. Some VTT-only styling may flatten when landing in SRT.
Does this transcribe video?
No. This tool converts existing subtitle files between formats. It does not listen to audio or invent captions from a video that has no subtitle track.
Is it free?
Yes. Subtitle format conversion is free within published daily counts and size limits. Download the converted file and open it in your player to confirm timing still matches.
Weird characters?
Save and upload UTF-8 captions for non-English text.
Multiple languages?
Convert each language file separately and name them clearly.