yt-fts searches YouTube channel subtitles from the command line to support full-text transcript searches.
Open source
24 alternativesYTSubConverter
YTSubConverter creates styled YouTube subtitles with formatting such as bold, italics, and color.
About YTSubConverter
YTSubConverter creates styled YouTube subtitles by converting subtitle files to SRV3/YTT for upload. It primarily converts .ass files made in Aegisub to .ytt, and also converts .sbv to .srt and between .ttml and .ytt. Output can include bold, italic, underline, colors, positioning, karaoke timing, vertical text and ruby text.
It is available for Windows, macOS and Linux. Use is limited by YouTube behavior, including restricted fonts, font-size rules, and that karaoke and transitions require an .ass source.
Key features
- Converts .ass subtitle files to .ytt for YouTube upload
- Converts .sbv files to .srt for editing
- Converts between .ttml and .ytt formats
- Produces bold, italic, underline, colors, positioning and karaoke timing
- Offers glow, bevel, soft shadow and hard shadow options
- Supports vertical text and ruby text
Best for: YouTube creators who prepare subtitles in Aegisub and need to upload them as styled .ytt files.
Good for
- Available for Windows, macOS, and Linux
- Approximates Aegisub subtitle appearance on YouTube
- Enables YTT features not available in YouTube's built-in editor
Watch out for
- YouTube limits fonts and defaults unallowed fonts to Roboto
- Font size cannot go below 75% and Android app ignores size settings
- Karaoke and transitions require an .ass source
YTSubConverter at a glance
- Category
- Social & Communities › YouTube Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Linux, macOS, Windows
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
YTSubConverter alternatives
Tools and sites you could use instead, ranked by how closely they match.
Browse Invidious from a terminal interface and select YouTube audio or video for playback.
Open source
24 alternatives
Scan YouTube comments for spam, then filter, search, delete, or report matching comments on channels.
Open source
24 alternatives
Unsubscribe from multiple YouTube channels with a browser script that works from the subscriptions page.
Open source
24 alternatives
FreeTube is an open-source YouTube app described as being designed for privacy.
Open source
24 alternatives
VacuumTube wraps YouTube Leanback for desktop use, with a built-in ad blocker and other interface enhancements.
Open source
24 alternativesPopular in YouTube Tools
Well-known listings from the same topic.
Youtube Multiplieryoutubemultiplier.comFilmotfilmot.comRecoverMy.Videorecovermy.videoYT Comment Viewercommentviewer.complaylist.toolsplaylist.toolsInvidiousinvidious.io
YTSubConverter FAQ
How do I convert .ass to .ytt?
Launch the program, open the .ass file and click Convert. On Windows, you can also drag the .ass file onto the .exe. Both produce a .ytt file ready for upload.
Can I add styling to existing unstyled YouTube subtitles?
Yes. Open the .sbv file downloaded from YouTube's editor, click Convert, then open the resulting .srt file in Aegisub to add styling.
Why convert TTML to YTT if YouTube accepts TTML?
Converting to .ytt gives access to more features and workarounds for YouTube bugs, though karaoke and transitions still require .ass.
Is something wrong or out of date?
Tell us and an editor will check it.
Own this website?
Claim this listing
Claim the listing and suggest updates yourself. An editor checks every claim first.