Convert SubViewer to Markdown.
Drop a text-based SubViewer or MicroDVD .sub file and get just the caption text as Markdown, with no timestamps. It runs entirely in your browser, so your file never leaves your device. Binary VobSub .sub is a different format and is not supported.
Drag & drop your files
or
Optimize for AI & RAG
Extra cleanup for LLM ingestion: strip HTML, fix smart quotes, tidy Unicode and spacing.
Add YAML front matter
Prepend a metadata block (title, source, date, word & token counts) for knowledge bases and RAG.
Add table of contents
Build a linked index from the headings. Handy for long documents.
Export RAG chunks (.json)
Split the result into retrieval-ready chunks. Download per file from the result panel.
Most converters quietly upload your documents to a server. This one physically can't.
Built for playback,
not for reading.
A .sub file wraps every line in frame markers and header tags a player needs. This converter strips that scaffolding and keeps only the spoken caption text.
{1}{100}Hello there.|General Kenobi.
{120}{240}You are a bold one.
Hello there. General Kenobi.
You are a bold one.
Everything you
actually need.
SubViewer captions in, plain Markdown text out, with no server and no account anywhere.
It never leaves your browser
Your .sub is read and converted on your own device. Nothing is uploaded to any server, ever.
# Heading
- point one
3 chunks
AI & RAG ready
Optional cleanup, YAML front matter, a table of contents and RAG chunk export.
Works offline
Once the page has loaded you can switch off your connection and it keeps converting.
Hello there. General Kenobi.
You are a bold one.
Just the caption text
The spoken lines are kept, line breaks within a cue join into a space, and the timing is removed.
Unicode safe
Accents, symbols and non-Latin scripts come through intact as UTF-8.
Free, and unlimited
No sign-up, no quotas, no watermarks. Convert one .sub file or a thousand; it all runs the same way, on your own device.
Text in,
timing out.
Honest about what comes through, and what doesn't. These are the same notes the Formats list shows for SubViewer, so the page never drifts from what the converter really does.
Kept
2- Subtitle text lines
- Line breaks joined into spaces
Dropped
3- Timing
- Header metadata
- Binary VobSub (not supported)
Hello there. General Kenobi.
You are a bold one.
SubViewer questions,
answered.
Everything worth knowing before you drop in a .sub file.
Other converters.
Working with more than subtitles? These convert the same way: privately, in your browser.
Crystallography to Markdown
.cif
Crystal structure data.
gettext to Markdown
.po · .pot
gettext translation catalogs.
XLIFF to Markdown
.xlf · .xliff
Translation interchange files.
Apple strings to Markdown
.strings
iOS & macOS string tables.
.NET resx to Markdown
.resx
.NET resource files.
M3U to Markdown
.m3u · .m3u8
Media playlists.
PLS to Markdown
.pls
PLS playlists.
CUE sheet to Markdown
.cue
CD track index sheets.