FILE FORMAT GUIDE
SubRip Subtitle (.SRT): Meaning & Safe Handling
An SRT file is a text sidecar containing numbered subtitle blocks, start and end timecodes, text and blank-line separators. It does not contain the video or audio.
Check supported header evidence locally. Identification is not file validation or a malware scan.
Analyze a file locallyQuick facts
- Extension
- .srt
- Format
- SubRip Subtitle
- Category
- document
- MIME type
- text/plain
- Standard / developer
- SubRip community
- Open with
- Plain-text editor
What is SRT?
SRT has broad conventional use but no single formal encoding rule. Styling and newline handling vary by tool, and players associate subtitles with media separately.
- Deliver timed subtitles or captions beside prerecorded media
How to open SRT
Text inspection does not verify timing, encoding or player-specific styling.
Plain-text editorDesktop text editor
Open as text without executing embedded markup. Confirm timecode order, blank-line separation and the intended character encoding; keep the media file separate.
Technical details
- Signature
- Not reviewed
- Encoding
- Text; no single character encoding standard
- Container
- Not applicable
- Compression
- Not inherent to the format
Public specification: no public spec.
Things to check
- Character encoding and supported styling are not standardized consistently across implementations.
Sources & review
Fact review: 2026-09-19. Unknown fields are not inferred from the file extension.