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Subtitle Toolkit

by toolboxes.top · remote · no sign-in to list tools · v1.0.0 · published by top.toolboxes

Convert, clean, retime and validate SRT, WebVTT, ASS/SSA, SBV and TTML subtitles. 8 tools.

Final · 4Changes · 4
CompareRegistry entry

8 tools: 4 do something that can't be undone and 4 change things.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http subtitle-toolkit https://subtitle-mcp.toolboxes.top/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

8 tools

Can't be undone 4Claude Code: ask
  • clean_subtitlesStrip noise from auto-generated subtitles: HTML/WebVTT tags, ASS override codes, music and sound-effect cues, speaker labels, empty cues and duplicate lines.No findings

    Why it is in this group

    • The input addresses people (input.to): what it sends cannot be taken back.
    Description, as the server wrote it
    Strip noise from auto-generated subtitles: HTML/WebVTT tags, ASS override codes, music and sound-effect cues, speaker labels, empty cues and duplicate lines. Returns the subtitle file in SRT or WebVTT.
  • convert_subtitleConvert subtitle text between formats.No findings

    Why it is in this group

    • The name "convert_subtitle" says "convert": a word for a change.
    • The input addresses people (input.to): what it sends cannot be taken back.
    Description, as the server wrote it
    Convert subtitle text between formats. Reads SRT, WebVTT, ASS/SSA, YouTube SBV and TTML/DFXP; writes SRT, WebVTT, ASS, CSV or plain text. Format is auto-detected unless `from` is given.
  • merge_subtitlesAppend one subtitle track after another (CD1 + CD2, or a second language track).No findings

    Why it is in this group

    • The name "merge_subtitles" says "merge": a word for a change that another call does not undo.
    • The input addresses people (input.to): what it sends cannot be taken back.
    Description, as the server wrote it
    Append one subtitle track after another (CD1 + CD2, or a second language track). The second track is offset so it starts after the last cue of the first, plus an optional gap.
  • split_subtitlesSplit one subtitle track into two parts at a given timecode, keeping original timecodes.No findings

    Why it is in this group

    • The input addresses people (input.to): what it sends cannot be taken back.
    Description, as the server wrote it
    Split one subtitle track into two parts at a given timecode, keeping original timecodes. Use the `at` argument plus `part` to fetch either half.
Changes things 4Claude Code: ask
  • check_subtitle_timingAudit subtitle readability and produce a report: reading speed (CPS), cue durations that are too short or too long, lines that are too wide, more than two lines, and overlapping cu…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Audit subtitle readability and produce a report: reading speed (CPS), cue durations that are too short or too long, lines that are too wide, more than two lines, and overlapping cues. Returns a formatted report listing every flagged cue.
  • fix_subtitle_encodingRepair mojibake — text where UTF-8 bytes were decoded as a single-byte encoding (cp1252/Latin-1 or cp1251).No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Repair mojibake — text where UTF-8 bytes were decoded as a single-byte encoding (cp1252/Latin-1 or cp1251). Symptoms: "é", "’", "привет". Returns the repaired text and how many passes were applied.
  • retime_subtitlesFix subtitle timing.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Fix subtitle timing. Use offset_seconds for a uniform shift (whole track early/late). Use ratio, or from_fps/to_fps, for progressive drift caused by a frame-rate mismatch. Pass exactly one of the three.
  • text_to_subtitlesTurn a plain transcript (one line per caption) into an SRT file with evenly spaced timecodes.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Turn a plain transcript (one line per caption) into an SRT file with evenly spaced timecodes. Timing is a starting point, not a real transcription — say so when you present the result.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http subtitle-toolkit https://subtitle-mcp.toolboxes.top/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__subtitle-toolkit__convert_subtitle",
      "mcp__subtitle-toolkit__clean_subtitles",
      "mcp__subtitle-toolkit__retime_subtitles",
      "mcp__subtitle-toolkit__check_subtitle_timing",
      "mcp__subtitle-toolkit__merge_subtitles",
      "mcp__subtitle-toolkit__split_subtitles",
      "mcp__subtitle-toolkit__fix_subtitle_encoding",
      "mcp__subtitle-toolkit__text_to_subtitles"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as subtitle-toolkit. Review it before you use it.