Convert SRT to TTML captions
Convert your subtitles in seconds — entirely on your machine. Nothing is uploaded: the file never leaves your device. CueForge preserves styling and positioning wherever TTML can express it, and shows you the exact loss matrix below before you commit. Exporting to TTML / IMSC is a CueForge Pro feature with a 7-day free trial — reading your SRT file stays free.
Open in the studio (Pro · 7-day free trial) →
What gets kept, what gets dropped
| Feature | SRT → TTML |
|---|---|
| Italics | Kept |
| Bold | Kept |
| Underline | Kept |
| Font colour | Kept |
TTML can additionally express Positioning, which you can add in the studio after converting.
About SRT
SubRip (.srt) is the most widely supported subtitle format: numbered cues with start and end timecodes plus plain text, and basic inline tags for italics, bold, underline and font colour. It carries no positioning or advanced styling, which makes it the universal lowest-common-denominator that almost every editor and player accepts.
About TTML
TTML (Timed Text Markup Language, also seen as DFXP and the IMSC1 profile) is the W3C XML caption standard used across OTT streaming and broadcast delivery. It expresses styling — italics, bold, underline and colour — and text positioning via tts: attributes. Parsing TTML/IMSC/DFXP is a CueForge Pro feature; validate any export against your platform’s current spec before delivery.
Frequently asked questions
Is converting SRT to TTML free?
Exporting to TTML (a broadcast delivery format) is a CueForge Pro feature, so this conversion needs Pro — but there is a 7-day free trial, and you won't be charged until it ends. Reading your SRT file and the other core formats (VTT, SBV, ASS) is always free.
Do I have to upload my file?
No — everything is converted in your browser; your file never leaves your device.
Will my formatting be preserved converting SRT to TTML?
Italics, Bold, Underline and Font colour carry across into TTML. Nothing your SRT file expresses is dropped. TTML can additionally express Positioning, which you can add after converting.
What is the difference between SRT and TTML?
SubRip (.srt) is the most widely supported subtitle format: numbered cues with start and end timecodes plus plain text, and basic inline tags for italics, bold, underline and font colour. It carries no positioning or advanced styling, which makes it the universal lowest-common-denominator that almost every editor and player accepts. TTML (Timed Text Markup Language, also seen as DFXP and the IMSC1 profile) is the W3C XML caption standard used across OTT streaming and broadcast delivery. It expresses styling — italics, bold, underline and colour — and text positioning via tts: attributes. Parsing TTML/IMSC/DFXP is a CueForge Pro feature; validate any export against your platform’s current spec before delivery.
Need the other direction? Convert TTML to SRT →