subtitle-sync

Self-hosted subtitles for movies, TV and sports, with or without Sonarr, Radarr or Sportarr. Search on demand, or automate downloads, sync and AI translation. Works with Plex, Jellyfin, Emby and Silo. No tracking.

CLI to shift .ass/.srt subtitle timestamps in bulk, with time range, regex filters, encoding override, and dry-run.

Anchor: A universal, hardware-accelerated CLI tool for subtitle synchronization (Whisper) and context-aware translation (NLLB)

Published: 2026-10-19

Get subtitles found, timed and saved next to every video in your Sonarr and Radarr library

Free Stremio addon: subtitles in your language (Serbian, Croatian, Bosnian or any other), lined up with the exact video you are playing. Docs; the addon runs at subtitlesync.stream.

Verify that a subtitle actually matches and syncs with a video using audio-based timing analysis. Detect wrong subtitles, find the correct timing offset, and automatically sync them.

SubtitleTools CLI - A command-line tool for managing and synchronizing subtitle files.

Sync localized dubs from a donor release onto a master video using FFT cross-correlation.

夜莺播放器：面向助眠场景的 Android 本地媒体播放器，无损播放，支持精确定位、MP4/MP3/WAV、WebVTT、 LRC字幕和后台播放。

Pairs subtitle files to their videos and retimes them to match, by cue timing rather than text. It works in any language.

Bring any .srt to the Netflix app on Android: a floating subtitle overlay that locks to playback and follows every seek.

Stremio addon that automatically re-times OpenSubtitles subtitles to your torrent's audio (fixes delay, framerate drift, cuts)

Convert & re-sync subtitles locally — SRT ⇄ WebVTT, shift, fix drift & overlaps. Exact timecode math, zero deps. Web app + library.

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.

This is a feature-rich Windows media player known for its ability to play damaged files and its built-in "Codec Finder" service that automatically locates missing codecs for unsupported video formats.

A simple tool for fixing subtitle timing and cleaning messy subtitle files from the command line.

Stremio addon that ranks, verifies and repairs subtitles from the subtitle addons you already use. Self-hosted, stateless.

Free browser-only SRT/VTT subtitle converter, resync tool & cleaner. No upload, no signup.

🎬 Web app to adjust SRT subtitle timings - full or partial shift with live preview. Privacy-focused, modern dark UI.