bal.pe.kr Subtitle Converter한국어

About · Supported Formats · Privacy · Operator

Last updated 2026-07-11 · This page covers the tool's trust (E-E-A-T) and privacy information.

Author Jikwang Kim (operator)Last updated bal.pe.kr micro-SaaS

What is this tool?

subconvert is a free web tool that converts subtitle files between SRT, WebVTT, SMI (SAMI) and TXT. Drag or paste a subtitle and it auto-detects the source format, converts to your chosen target, and lets you preview, copy or download the result instantly. On top of conversion it adds a sync offset, FPS retiming and EUC-KR encoding recovery to solve real-world subtitle problems, not just format swaps.

Supported formats

  • SRT (SubRip) — HH:MM:SS,mmm timecodes, numbered cues; the most compatible format.
  • WebVTT — WEBVTT header and HH:MM:SS.mmm timecodes; the HTML5 web standard.
  • SMI (SAMI) — <SYNC Start=ms> structure; common on older Korean players.
  • TXT — plain text with timecodes removed (output only).

Privacy — files are never sent to a server

All parsing and conversion in subconvert happen inside your browser. Files are read locally with the File API and results are saved with a Blob download. No subtitle content is ever uploaded, there is no account, and no copy is stored online. Only your conversion settings (target format and offset) are saved in your browser's localStorage and in the optional share link (?s= token) — and that token never contains the file content. Apart from ads and traffic analytics needed to run the site, no personal data is collected.

Accuracy and limitations

  • Every timecode is computed in milliseconds internally so timing never drifts between formats.
  • Line breaks and basic <i>/<b>/<u> tags are preserved, but advanced ASS/SSA styling, VTT positioning and SMI CSS classes are not fully carried over.
  • TXT has no timing, so it cannot be converted back into a timed format.

Who runs it

subconvert is built and operated by bal.pe.kr, a single-operator micro-SaaS portfolio from Korea. The goal is practical, no-login tools that run right in the browser and are easy for anyone to use.

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