Does the subtitle converter upload files?
No. Conversion runs in the browser, so your subtitle file stays on your machine while you convert and export it.
Subtitle Converter
Convert between every subtitle format.
Free browser-based subtitle conversion across 117 format combinations. No uploads, no server — everything runs client-side with frame-accurate timing.
9 parseable source formats14 export formats126 conversion pairsClient-side processingFrame-aware timing
Converter Context
Accurate conversion is not just file translation.
The real failure mode is losing timing truth while moving between subtitle formats, framerates, and delivery targets. These pages explain the math, the formats, and the places most subtitle tools break.
Why 29.97 Subtitle Sync Drifts
The engineering reason subtitle timing fails when tools treat frames like milliseconds.
Open resource →SRT vs VTT vs ASS
A practical comparison of the formats teams actually exchange every day.
Open resource →Timecode Engine
How the library stores frame truth internally and why that matters for conversion integrity.
Open resource →Convert from SRT
SRT (SubRip Subtitle) is the most widely used subtitle format. It stores timed text with simple sequential numbering, start/end timestamps, and plain or basic HTML-formatted text.
Convert from VTT
WebVTT (Web Video Text Tracks) is the W3C standard for displaying timed text in HTML5 video. It supports styling, positioning, and cue settings for web-based media players.
Convert from SBV
SBV (SubViewer) is a simple subtitle format commonly used for YouTube captions. It uses a minimal timestamp format without sequence numbers, making it compact and easy to edit.
Convert from ASS
ASS (Advanced SubStation Alpha) is a feature-rich subtitle format popular in anime fansubbing. It supports advanced styling, positioning, animations, and effects through override tags.
Convert from SAMI
SAMI (Synchronized Accessible Media Interchange) is a Microsoft-developed caption format using HTML-like markup. It supports multiple languages in a single file and CSS styling.
Convert from IMSC
IMSC (Internet Media Subtitles and Captions) is a W3C profile of TTML used by Netflix and other streaming platforms. It provides precise timing and rich styling for professional subtitle delivery.
Convert from FCPXML
FCPXML is the XML interchange format for Final Cut Pro. It represents titles and captions as timeline elements with precise frame-based timing tied to the project framerate.
FCPXML → SRT.fcpxml → .srtFCPXML → VTT.fcpxml → .vttFCPXML → SBV.fcpxml → .sbvFCPXML → ASS.fcpxml → .assFCPXML → SAMI.fcpxml → .smiFCPXML → IMSC.fcpxml → .xmlFCPXML → EBU-STL.fcpxml → .stlFCPXML → SCC.fcpxml → .sccFCPXML → DFXP.fcpxml → .dfxpFCPXML → CSV.fcpxml → .csvFCPXML → JSON.fcpxml → .jsonFCPXML → TXT.fcpxml → .txtFCPXML → Graphics STL.fcpxml → .zip
Convert from EBU-STL
EBU-STL (European Broadcasting Union Subtitle Transfer Language) is a binary broadcast subtitle format widely used in European television. It supports teletext-level formatting and precise broadcast timing.
EBU-STL → SRT.stl → .srtEBU-STL → VTT.stl → .vttEBU-STL → SBV.stl → .sbvEBU-STL → ASS.stl → .assEBU-STL → SAMI.stl → .smiEBU-STL → IMSC.stl → .xmlEBU-STL → FCPXML.stl → .fcpxmlEBU-STL → SCC.stl → .sccEBU-STL → DFXP.stl → .dfxpEBU-STL → CSV.stl → .csvEBU-STL → JSON.stl → .jsonEBU-STL → TXT.stl → .txtEBU-STL → Graphics STL.stl → .zip
Convert from SCC
SCC (Scenarist Closed Captions) is the standard closed caption format for North American broadcast television. It encodes CEA-608 data with frame-accurate SMPTE timecodes.
Converter FAQ
The points that usually get missed in subtitle delivery.
Why does framerate matter for subtitle conversion?
Formats that look timestamp-based still need correct frame interpretation when you shift, retime, validate, or round-trip across delivery formats.
Can I repair or validate after conversion?
Yes. Use Transform to strip formatting, repair tags, normalize dialog styles, enforce duration and gap rules, and validate problem cues.