Load a local video with dual subtitles and loop it sentence by sentence. Nothing uploads — just open and practice.
Master Spoken English with Your Own Video Library
SentenceLoop is a free, browser-based sentence-looping player engineered to help you acquire fluent English using video content you already own. By transforming standard videos into interactive, line-by-line listening workshops, SentenceLoop lets you break down authentic speech, conquer difficult accents, and absorb natural phrases directly from movies, series, lectures, and documentaries.
We believe learning tools should respect user privacy by default: your video files and subtitle tracks never leave your computer and are never uploaded to any cloud server. Everything executes locally inside your web browser sandbox. Once loaded, SentenceLoop operates smoothly even without an internet connection, ensuring complete confidentiality, zero bandwidth costs, and total control over your personal media collection.
How It Works
- Step 1: Choose and open any local video file from your device.
- Step 2: Add your English subtitle file, plus an optional second-language subtitle track for parallel bilingual reference.
- Step 3: Start playback to let individual sentences loop automatically, using an optional slow first pass to train your ear to subtle sound changes.
- Step 4: Tap any unfamiliar word for instant definitions, save vocabulary to your personal wordbook, practice with interactive fill-in-the-blank drills, and export cards directly to Anki.
Key Features
- Configurable sentence repeat from one to five cycles, with an optional slow first pass for effortless auditory parsing.
- First-pass subtitle hiding to promote active blind listening before revealing text on subsequent repetitions.
- Simultaneous bilingual dual-track display with per-track subtitle delay adjustment to fix out-of-sync lines.
- Broad subtitle format compatibility covering SRT, VTT, and ASS files with automatic GBK character encoding detection.
- Built-in tap-to-define offline dictionary packed with thirty thousand entries for instantaneous word lookups.
- Two distinct difficulty tiers of context-aware fill-in-the-blank listening exercises.
- Built-in vocabulary management with one-click export to TXT, CSV, and Anki-compatible decks, plus printable review sheets.
- Automatic playback position bookmarking, a preloaded open-source sample video (Sintel, CC BY) for instant testing, and no account requirements or usage restrictions.
Frequently Asked Questions
Are my media files uploaded to your servers?
No. SentenceLoop operates entirely on the client side inside your web browser. Neither your video streams nor your subtitle files are ever transmitted across the network, keeping your viewing history and documents completely private.
Which file formats are supported?
The player natively supports MP4 and WebM video formats, alongside SRT, VTT, and ASS subtitle formats. MKV container playback depends entirely on whether your specific browser supports the embedded audio and video codecs.
Do I need an account or a paid subscription?
No. SentenceLoop is entirely free to access with no account registration, sign-up forms, tier limitations, or hidden payment gates.
Where can I get compatible subtitle files?
You can extract subtitles already packaged with your purchased media or download matching community subtitle files from reputable online subtitle repositories. Always ensure you only use files and materials you have the legitimate right to access.
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