YouTube AI summarizers & note-takers
Tools, mostly browser extensions and web apps, that pull YouTube video transcripts to generate summaries, timestamped notes, chat Q&A, quizzes and searchable libraries for people learning or researching from long videos.
Built for: Students, self-learners, researchers, content creators
Projects since May 04
184
Different builders
167
Last 4 weeks vs 8 before
-19%
AI is the core
57%
Projects per week
Mostly browser extension (46%), web app (42%), desktop app (3.8%) · from r/SideProject, r/chrome_extensions, r/SaaS, r/IMadeThis
Latest
- Contextify — Scores a video's spoken opening line on hook strength, clarity, pacing, rewatch value and search, and suggests stronger rewrites.“I built a tool that scores your video's opening line before you film it. Looking for 5 creators to try it”
- AdScanVideo — Turns uploaded video footage into timestamped shot-by-shot notes describing visuals and dialogue.“I built a video-review tool. Here is what it actually found in a five-second clip.”
- YouTube ClipMind — Saves custom start-and-end segments of YouTube videos as clips with Markdown notes that can be shared or exported.“I built YouTube ClipMind tool to save YouTube video clips with Markdown notes”
- YouTube Clipper — Creates shareable clips of YouTube videos by adding a clip button to YouTube and generating links that play a chosen start and end time.“I'm Recreating YouTube's Clipping Feature as my First Chrome Extension”
- Marks moments in YouTube videos, saves them to a library with notes and tags, captures captions, generates summaries, and lets users chat with the video.“I find it very challenging to grow my extension. HELP!!”
- Transcript Extractor — Extracts, cleans, and searches lecture transcripts from online course players, with timestamped notes and exports.“I built a local-first Chrome extension for studying online courses”
- TubeExtract — Extracts user-defined entities from YouTube videos using specialized NER models and returns structured JSON via web UI or API.“I Applied Structured Data Extraction to YouTube Videos and Built a Pipeline + Free Dataset”
- YT Digest — Exports YouTube video transcripts and sends them to the user's ChatGPT account in a new conversation, with clickable timestamps that jump the video.“I made YT Digest chrome extension to export Youtube transcripts to ChatGPT in single click”
- Transcribes spoken audio from Instagram Reels, either single pasted links or batches pulled from a creator profile, and exports the text as TXT, SRT, JSON, or ZIP.“I built a tool to research how creators structure their Reels”
- 2ldw — Summarizes a YouTube video by answering the question its clickbait title promises and noting the creator's promotional agenda.“I built a YouTube video summarizer that gives you the answer promised in clickbait titles and points out the creator’s hidden agenda”
- CofYT — Generates text answers about a YouTube video grounded in its transcript.“We just launched our YouTube to text extension”
- Quizmark — Injects short AI-generated quizzes into YouTube videos at intervals the user chooses.“My ADHD inspired Quizmark, a free chrome extension that embeds short quizzes in YouTube videos”
- Jev — Finds the exact moment in a long video that answers a question and returns it as a clip.“Jev is great for clipping. ask a health question, get exact answer clips”
- Peel — Analyzes YouTube videos to break down their cuts, captions, motion, audio, pacing and structure.“I finally launched my Chrome extension that breaks down how YouTube videos are edited”
- FocusCourse Studio — Turns YouTube videos and playlists into structured courses with a distraction-free viewer, focus timer, AI-generated assignments, and progress tracking.“I created a free version of Courses check it out..”
- ClipEZ — Transcribes Twitch VODs into a searchable, video-synced text editor for cutting vertical short clips with captions.“I made an app that lets you search a 4 hour Twitch stream like a text document”
- Summarizes the content of each post or video from creators a user subscribes to.“How to Market such a Product”
- youtubetext — Displays YouTube video transcripts on a dedicated page reached by editing the URL, with search and copy or download options.“I made a tool that let's you get YouTube transcripts/subtitles in seconds using a simple URL hack”
- YouTube Timestamp & Chapters Exporter — Captures timestamps via hotkey while watching YouTube videos and exports them as chapter lists for descriptions, Markdown, or CSV.“YouTube Timestamp & Chapters Exporter - Chapter your videos while you're still recording your review pass in YouTube Studio”
- YouTube Tags (free) — Shows the metadata tags of a YouTube video and lets the user copy them individually or all at once.“A free YouTube tags extension”
Most discussed
- videoreplicate — Analyzes a viral video and produces a breakdown of its hooks, structure and scenes, plus a remake plan for the user's own content.“I’m shutting down my AI video SaaS after $1,078 in ads and 226 users. Here’s what I learned.”
- Extracts a written recipe from a pasted recipe video link.“Made a simple tool that converts recipe videos into written recipes. 600 daily users now and I'm completely unprepared”
- MemryLoop — Helps users learn from YouTube videos with AI-generated notes, bilingual subtitles, keyword highlighting, and a personal learning library.“Let's exchange honest feedback on our Chrome extensions”
- Claras — Generates custom-prompted summaries, tables of contents, and AI chat for YouTube videos from a browser side panel, including bulk analysis of playlists and search results.“my youtube summarizer extension passed $1k lifetime. sharing what people actually use it for (its not the summaries)”
- VCrumb AI — Lets users take rich-text notes and timestamped screenshots beside a YouTube video, stored locally in the browser.“How I built a local-first YouTube note-taking extension (and why local storage made study notes feel so seamless for learners as core)”
- Revio — Collects timestamped video review comments from clients via a shared link without sign-up, and uses AI to prioritize feedback and parse pasted chat messages into structured comments.“As an editor how do you manage messy client feedback”
- AskYouTube — Answers user questions about a YouTube video's content using a choice of AI models.“I got tired of wasting 40 minutes on YouTube just to find one answer, so I built this.”
- Claras — Generates AI summaries, table of contents, transcripts and chat for YouTube videos in a Chrome extension.“40 days into my new extension: I crossed 200 installs, €34 MRR and €500 in revenue!”
- Contextify — Analyzes short-form video scripts and gives feedback on hooks, structure, pacing, and SEO.“I’m finally getting organic users, but almost nobody comes back. What would you fix first?”
- youtubetranscript.dev — Extracts transcripts from YouTube videos given a URL, with a paid API for programmatic access.“Simple YouTube transcript tool: 40-50 new users per day, ~2K USD ARR, zero marketing”