Free, instant, and entirely in your browser — your subtitle file is never uploaded.
MicroDVD counts frames, not seconds — this has to match the video.
ASS is a typesetting language that happens to carry subtitles. Named styles, exact positioning, rotation, fades, karaoke timing and vector drawing all live in the file, split across a [Script Info], a styles and an [Events] section.
SRT is the plainest subtitle format there is: a number, a start and end time, the lines of text, a blank line, repeat. It came out of a 1990s DVD-ripping program called SubRip and has outlived every format designed to replace it, precisely because there is almost nothing in it to go wrong.
This is the most consequential conversion on the site, and the one people are most often surprised by. Fansubbed releases ship as ASS because the typesetting is part of the translation — a sign on a wall rendered in place, a note positioned at the top of frame, colours that tell two speakers apart. None of that survives here, because SRT has no concept of position, font or colour. The dialogue and its timing come across perfectly; the layer of work that made it look designed does not. Do it when you need the file to play somewhere that refuses ASS, and keep the original.
You almost certainly want SRT because something refuses to take what you have. It is the format with the fewest ways to be rejected: media players, Plex and Jellyfin libraries, YouTube, Vimeo, editing software and hardware players all read it without complaint. Converting into SRT is the standard move for making a subtitle simply work somewhere.
This is a downgrade in capability, and worth doing on purpose. The source format is a typesetting language: named styles, exact positions, fades, karaoke timing, even vector drawings. The target has none of that — it has text and two timestamps. So the words and the timing come across intact, and everything that decided how they looked on screen is dropped. Signs translated in place, on-screen labels positioned over the original, coloured speaker attribution: all of it becomes ordinary subtitle lines. That is the trade for a file almost every player and platform will accept without argument.
No. The conversion runs in your browser using JavaScript — your ASS file is read from disk, converted in memory and handed back as a download. Nothing is transmitted, so there is nothing for us to store or delete. You can disconnect from the internet after this page loads and the conversion still works.
This is the most consequential conversion on the site, and the one people are most often surprised by. Fansubbed releases ship as ASS because the typesetting is part of the translation — a sign on a wall rendered in place, a note positioned at the top of frame, colours that tell two speakers apart. None of that survives here, because SRT has no concept of position, font or colour. The dialogue and its timing come across perfectly; the layer of work that made it look designed does not. Do it when you need the file to play somewhere that refuses ASS, and keep the original.
The page checks before it converts. Subtitle formats are identified by what is inside the file rather than by the extension — which matters, because .sub alone is used by three unrelated formats. If you hand this page something that is not ASS, it says so and points you at the all-format converter instead of producing a broken file.