ffsubsync

Desktop batch queue for subtitle synchronization, harnessing four engines (ffsubsync, alass, lapse and autosubsync)

Native C++ reimplementation of ffsubsync for subtitle synchronization. Zero Python dependency — built for Android (JNI), iOS, embedded Linux, and desktop.

Free subtitle sync for web, Windows, macOS and Linux. Fix SRT timing and frame-rate drift locally, choose any audio track, preserve subtitle languages. No uploads or API keys. EN/ES interface.

mpv script for automatic subtitle retiming with async jobs, cache support, and an on-screen menu.

One-click subtitle synchronization for VLC

All-in-one CLI for subtitle management: download, translate, convert, sync, clean, merge, fix, extract, and embed subtitles.

macOS CLI that finds Chinese subtitles, auto-syncs them to movie audio, and writes Infuse-ready files.

Repairs subtitles whose timing drifts in pieces, by aligning them with alass to a reference in another language. CLI, Bazarr hook and a local server for a browser extension.

Desktop GUI to batch-sync .srt subtitles to the audio of your videos. Fixes offsets and framerate drift, keeps backups. Built on ffsubsync.

bash script to align and rename subtitles using ffsubsync

FFsubsync in AppImage

Subtitle sync plugin for Jellyfin 10.11 — bundled ffsubsync, zero-setup install, server-side batch queue, original files untouched

A universal GUI launcher for convenient subtitle synchronization tools. 一个方便字幕调轴工具使用的通用GUI启动器

Automated video-subtitle synchronizer with Batch Directory matching

Pocket Subtitles — self-hosted subtitle sync pipeline for Bazarr/Jellyfin: audio-based offset detection, a content-fit gate that rejects wrong-episode subs, per-file verdicts, nudges and a status dashboard. One Go binary, one SQLite file.