SRT subtitle merger

Combine two SRT subtitle files into one, cleanly renumbered. Append mode shifts the second file to start after the first one ends, plus an optional gap — ideal for joining subtitles of two video parts. Overlay mode keeps both original timings and sorts every cue chronologically, for merging two subtitle tracks.

120 + 95 → 215 — the tool shows every step in between, not just the final figure.

Trimming a clip to the part that matters, pulling the audio out of a video, and converting to the format a platform will actually accept.

Re-encoding when a copy would do. Every lossy pass loses quality that no later step recovers, so trimming without re-encoding is always the better route when the format is already right.

They sit next to each other but answer different questions: SRT subtitle time shift is the one to open when you need it to fix out-of-sync subtitles by shifting every timestamp in an SRT file by the same offset. Paste the subtitles, enter a positive offset to delay them or a negative one to move them earlier, in seconds or milliseconds, and copy or download the corrected file. Times are clamped so they never go negative. Pick whichever matches what you're starting from — both are free.

CSV to SRT converter is the closest one after this: Rebuild a valid SRT subtitle file from a CSV of index, start, end and text. Times accept either the hh:mm:ss,mmm format or a plain number of seconds, a header row is skipped automatically, and cues are renumbered in order. Perfect for turning a translated or edited spreadsheet back into subtitles.

SRT to CSV converter and SRT to TXT converter — they come up in the same task often enough to be worth a second tab.

Processing runs in the browser through a WebAssembly build of the same encoders desktop tools use, on a single thread. That keeps the file private and off any server, and makes long clips slower than a native application.