Overline
Overline is a Chrome extension that overlays real-time AI captions and live translation on any browser video with ultra-low latency, plus automatic transcript saving and export.
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Product Information
Updated:Jun 5, 2026
What is Overline
Overline is a Chrome extension designed to help you understand any video in your browser—without relying on built-in subtitles or switching tabs. It works across popular platforms like YouTube, Coursera, and Netflix, as well as virtually any website where video plays in a Chrome tab. Overline provides real-time captions and instant translation across 10+ languages, and it also keeps a history of your caption sessions so you can review or download transcripts later.
Key Features of Overline
Overline is a Chrome extension that overlays real-time AI captions and live translation on top of any browser video, so you can understand content without relying on built-in subtitles or switching tabs. It uses Deepgram’s streaming speech recognition for low-latency transcription and supports instant translation across multiple languages. Sessions are saved to a transcript history and can be exported as TXT or SRT for review, notes, or subtitle workflows.
Real-time caption overlay: Displays captions directly on top of videos across the web (e.g., YouTube, Coursera, Netflix) without needing native subtitles.
Low-latency streaming transcription: Powered by Deepgram streaming speech recognition to keep captions close to live speech (marketed as within milliseconds / ~112 ms latency).
Instant live translation (10 languages): Translates captions as words are spoken, with support for languages including English, Persian, Arabic, Spanish, French, German, Japanese, Chinese, Korean, and Portuguese.
One-click workflow: Install the extension, open any video site, click the Overline icon, and start captions—no downloads or subtitle files required.
Transcript history + exports: Automatically saves session transcripts to your account and allows exporting as TXT or SRT for later study, sharing, or subtitle reuse.
Use Cases of Overline
Online learning & MOOCs: Add real-time captions/translation to lectures on platforms like Coursera to improve comprehension and note-taking in your preferred language.
Cross-language professional training: Enable multilingual teams to follow internal training videos or webinars with live translated captions.
Media & entertainment accessibility: Overlay captions and translations on streaming or web video content when subtitles are missing, inaccurate, or unavailable in a needed language.
Language learning immersion: Watch native content with live captions and switch translation languages instantly to compare phrasing and improve listening skills.
Content repurposing & subtitling workflow: Export SRT/TXT transcripts from viewing sessions to speed up creating subtitles, summaries, and searchable notes.
Pros
Works broadly across websites (overlay on any browser video) without relying on built-in subtitles.
Fast, streaming captions designed to keep up with live speech and offer instant translation.
Transcript history with TXT/SRT export supports review and downstream subtitle/note workflows.
Free tier available with no credit card required to start.
Cons
Usage is metered by minutes/hours per month (e.g., free tier limited to 20 minutes/month).
Language support is limited to the set offered (marketed as ~10 languages).
Requires Chrome and installing an extension (not a standalone player).
How to Use Overline
1. Install Overline (Chrome extension): Open the Chrome Web Store listing for Overline and click “Add to Chrome” to install the extension.
2. Sign in to your Overline account: After installation, open Overline from the extension icon and sign in to get started.
3. Open a video in your browser: Navigate to any video page you want to watch (e.g., YouTube, Coursera, Netflix, or other websites with browser video).
4. Launch Overline on the video: Click the Overline extension icon while the video is open to activate the overlay on top of the video.
5. Start real-time captions: Click “Start Captions” to begin live transcription; captions will appear as an on-video overlay in near real time.
6. Choose your caption/translation language: Select the language you want to read in (Overline supports 10 languages) and switch languages instantly while captions are running.
7. Review saved transcript history after the session: When you finish, access your account’s transcript history to find the saved session transcript.
8. Export transcripts if needed: Download your saved transcript as TXT or SRT for notes, subtitles, or review.
9. Manage usage with the right plan: If you exceed the Free plan’s monthly minutes, upgrade to Plus or Pro for more captioning time and priority processing.
Overline FAQs
Overline is a Chrome extension that adds real-time AI captions and live translation as an overlay on top of any browser video—so you can understand videos without needing existing subtitles or switching tabs.
Overline Video
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