SubFlex - Smart Subtitle Controller & Sync icon

SubFlex - Smart Subtitle Controller & Sync

by ExtensionFlex · Tools
Manifest V3 Free
View in Chrome Web Store Data as of 21 Oct 2026

Control video subtitles with dynamic multi-point sync for cut scenes, speed adjustment, and floating dialogue scrubber.

Users
18
+9 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#161K
#135K among extensions
Version
1.2.0
updated 21 Sep 2026

Users

monthly, 1 months
0918Sep 2026Oct 2026Oct 2026
Latest, 21 Oct 2026: 18 usersMove the mouse over the chart for any month

Ratings count

monthly, 1 months
001Sep 2026Oct 2026Oct 2026
Latest, 21 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About SubFlex - Smart Subtitle Controller & Sync

SubFlex is the next-generation subtitle controller and synchronization tool for Chrome and Edge. Tired of subtitles that drift out of sync, or movies where YouTube/streaming cuts make the subtitles completely useless after the first scene? SubFlex fixes subtitle timing with visual feedback. 🌟 KEY FEATURES: ⚓ Cut-Scene Step Anchors (Category First!) Traditional subtitle extensions only support a single delay (+0.5s / -0.5s). The moment a song, opening logo, or scene is trimmed, normal subtitles break. With SubFlex, click "⚓ Sync Here" at any cut to lock dialogue to that exact scene! 📜 Visual Dialogue Scrubber Drawer Slide open the interactive transcript drawer. Search any spoken phrase, see real-time highlighted speech, and click any line to snap playback and subtitles into 100% sync. ⏱️ 2-Point Linear Speed Calibration Fix frame rate drift (23.976 FPS Film vs 25 FPS PAL drift) in two clicks. Mark Point 1 near the intro and Point 2 near the climax — SubFlex calculates the exact speed ratio automatically. 🎛️ Floating Cyberpunk HUD Controller A sleek on-player dock that lets you nudge timing, adjust font size/color, toggle subtitles on/off, or pause captions directly from the video player without leaving fullscreen. 💬 Live AI Caption Feature Generates Live Caption and Also you can choose your own language and it will ready to be use. 🔍 16M+ Online Subtitles + Drag & Drop Drag-and-drop any local .srt or .vtt file onto the player, or search over 16 million subtitles online with 1-click streaming without downloading. 🛡️ 100% Private & Safe No analytics, no tracking, and zero personal data collection. Runs entirely in your browser memory.

Growth

WindowUsersChangeRatingsRating
7 days+4+28.6%00.00
30 days+9+100.0%00.00

Version history

3 versions recorded
1.2.021 Sep 2026
1.1.014 Sep 2026
1.0.012 Sep 2026

Details

Category
Tools
First seen
12 Sep 2026
Size
204 KB
Languages
en
Pricing
Free
Privacy policy
github.com
Extension ID
candbaifnimcdpfaibgjcebimiafcjil

Permissions and risk

Moderate riskimpact 2, likelihood 3
Permissions
storageactiveTabscripting
Site access
https://api.opensubtitles.com/*https://www.subtitlecat.com/*https://translate.googleapis.com/*

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