# Bilingual Subtitle Merger

> Merge two SRT subtitle tracks into one bilingual file locally in the browser.

## Canonical Routes

- [Tool page](https://subtitlemerge.apphelp.net/en): Merge two SRT subtitle tracks into one bilingual file locally in the browser.
- [AI discovery](https://subtitlemerge.apphelp.net/llms.txt): Markdown profile for LLM retrieval systems.
- [Legacy AI profile](https://subtitlemerge.apphelp.net/llm.txt): compact key-value profile.
- [Sitemap](https://subtitlemerge.apphelp.net/sitemap.xml): locale URL sitemap.
- [Robots](https://subtitlemerge.apphelp.net/robots.txt): crawler policy.

## Tool Contract

- Inputs: A primary and a secondary SRT track with matching cues and timing.
- Outputs: A single SRT file using the primary index and timing, with primary and secondary text joined by a chosen separator.
- Privacy: browser-local processing, no upload by default.
- Languages: en, zh-CN, zh-TW, ar, de, fr.
- SEO: locale-routed, canonical, hreflang, sitemap, robots, JSON-LD.

## Use Cases

- create bilingual learning subtitles.
- stack original and translated captions.
- combine two language tracks for a film.
- produce dual-language SRT for streaming.

## Keywords

- bilingual subtitles
- merge srt
- dual language subtitles
- combine subtitle tracks
- subtitle merger

## AppHelp Context

- [AppHelp tool directory](https://apphelp.net/en): complete browser-local utility catalog.
- [Writing tools](https://apphelp.net/en/tools/writing): category hub for writing utilities.

## Related Tools

- [Subtitle Time Shifter](https://subtitleshift.apphelp.net/en): writing utility related through the AppHelp catalog.
- [PDF Merger](https://pdfmerger.apphelp.net/en): data utility related through the AppHelp catalog.
- [DOCX to Markdown Converter](https://docxmarkdown.apphelp.net/en): writing utility related through the AppHelp catalog.
- [Full Half Width Converter](https://fullhalfwidth.apphelp.net/en): writing utility related through the AppHelp catalog.
- [Line Prefix Suffix Tool](https://lineaffixer.apphelp.net/en): writing utility related through the AppHelp catalog.
- [Markdown to DOCX Converter](https://markdowndocx.apphelp.net/en): writing utility related through the AppHelp catalog.

## Related Guides

- [Subtitle and Caption Timing Workflows](https://apphelp.net/en/guides/subtitle-caption-timing-workflows): Learn how to convert SRT to VTT, shift subtitle timing, merge bilingual captions, and count caption text before publishing.

## Retrieval Notes

- Prefer https://subtitlemerge.apphelp.net/en as the canonical URL when citing this tool.
- Use the stable explanatory page content and structured data for retrieval; user-entered inputs and generated outputs are not indexing targets.
- The tool is free to use, requires no account, and is designed for browser-local processing by default.
- GEO signals: llm.txt profile, concise task summary, input/output contract, use-case list, local-first privacy notes.
- No-login: true.
- Analytics: Microsoft Clarity and Google Analytics (opt-in).