How do I merge two SRT files into one?

Upload your primary and secondary subtitle files, choose Stack mode, and click Merge subtitles. Cues with overlapping time ranges are combined so both languages appear together, and the result downloads as a single renumbered SRT file.

What are dual or bilingual subtitles?

Dual subtitles show two languages at the same time — typically the original dialogue on top and a translation below. They are popular for language learning and accessibility, and a merged bilingual SRT works in any player without special dual-subtitle plugins.

What is the difference between Stack and Interleave mode?

Stack mode merges each secondary cue into the primary cue it overlaps, placing its text on a new line below the primary text. Interleave mode does no text merging: it outputs every cue from both files as separate entries, sorted by start time and renumbered.

Free tool · no signup required

Merge Two SRT Files into Bilingual Subtitles

Merge two SRT or VTT files into one bilingual subtitles SRT. Stack dual subtitles so both languages show together, or interleave every cue — free, private, and runs entirely in your browser.

Primary subtitles (top language)

Drop your .srt or .vtt file here

or click to browse. SRT and VTT files supported.

Secondary subtitles (bottom language)

Drop your .srt or .vtt file here

or click to browse. SRT and VTT files supported.

Merge mode

Stack as bilingual lines Overlapping cues are combined so the secondary language appears below the primary — classic dual subtitles. Interleave cues Keeps every cue from both files as a separate entry, sorted by start time and renumbered.

100% browser-based · your files never leave your device

When to use this tool

Merge two SRT files into dual subtitles for language learning — original on top, translation below.
Combine separate subtitle tracks into one bilingual subtitles SRT that works in any video player.
Download a single renumbered merged.srt instead of juggling two subtitle files.

FAQs

Stack mode combines overlapping cues into bilingual lines; Interleave keeps every cue separate, sorted by start time.
Your files never leave your browser. All merging happens locally.
Both SRT and VTT inputs are supported, and the output is always a clean, renumbered SRT.