SUB to SRT Converter

You have MicroDVD SUB captions and need SRT. The SUB to SRT Converter converts the frame indices back into timecodes.

Each line {startFrame}{endFrame}text is read, the frames are divided by the FPS (auto-detected from a {1}{1}rate header when present, otherwise your setting) to produce HH:MM:SS,mmm, the | separators become line breaks, and the cues are numbered. Set the frame rate to match the source video and convert.

• Frame to time: {sf}{ef} becomes HH:MM:SS,mmm.
• Auto FPS: reads {1}{1}rate header.
FPS fallback: 23.976 default.
• Line restore: | becomes newlines.
• Renumbering: sequential indices.
• Private: parsed in your browser.

1. Paste your SUB (sample preloaded).
2. Set FPS only if there is no {1}{1} header.
3. Click Convert to SRT and copy or download.

Example 1 — Modern player. A tool only reads SRT.

Example 2 — Edit pass. Move captions into an SRT editor.

Example 3 — Rate mismatch. Override FPS to fix timing.

• Universal output: SRT opens everywhere.
• Smart FPS: header-aware.
• No manual numbering: done for you.
• Lossless text: wording preserved.
• Private: stays in the browser.