Free YouTube AI Tools
to Summarize, Transcribe & Download
Transform any YouTube video into AI summaries with clickable chapters, download full transcripts with timestamps, extract comments, and get thumbnails — all 100% free. No signup required.
Everything You Need for YouTube Videos
6 powerful free tools to analyze channels, summarize, transcribe, download, and extract from any YouTube video. No signup required.
YouTube Channel Analytics
Deep channel performance insights
Analyze any channel's stats, engagement, upload frequency, and estimated revenue.
YouTube Transcript Generator
Full transcripts with timestamps
Get complete word-for-word transcripts from YouTube's captions instantly.
YouTube Comment Extractor
Download all comments as JSON
Extract all comments with replies, likes, and author info. Export to JSON.
YouTube Thumbnail Downloader
HD thumbnails in all sizes
Download thumbnails from 120×90 to 1280×720. JPG and WebP formats.
YouTube Video Summarizer
AI summaries with clickable chapters
Transform any video into structured notes with timestamps, key points, and quotes.
YouTube Subtitle Downloader
One-click SRT downloads
Download subtitles in SRT format. No API key required.
Built for Speed, Privacy & Simplicity
No accounts, no subscriptions, no data collection. Just free tools that work.
AI Video Summarizer
Get instant summaries with clickable timestamps and auto-generated chapters. Click any timestamp to jump to that moment.
Transcript Generator
Extract full transcripts from any YouTube video with accurate timestamps. Works with auto-captions in 100+ languages.
Privacy-First
Your data stays on your device. We never collect, store, or transmit personal information. You control your API key.
100% Free Tools
All tools are free with no hidden fees. Use your own Gemini API key with generous free tiers (1,500 req/day).
Perfect for Students, Researchers & Creators
Join 50,000+ users who save hours every week with our free YouTube AI tools.
Students
Turn lecture videos into study notes. Never miss a key concept again.
25,000+ active users
Researchers
Extract transcripts and citations from academic videos with timestamps.
8,000+ active users
Content Creators
Repurpose video content into blog posts, scripts, and social media.
12,000+ active users
Professionals
Summarize meeting recordings and training videos in seconds.
15,000+ active users
Get Started in 60 Seconds
No complicated setup. Pick a tool, paste your link, get results.
Choose Your Tool
Pick from 6 free YouTube AI tools. Online tools work instantly in your browser.
Paste Video Link
Copy any YouTube video URL and paste it into the tool. That's it.
Get Instant Results
Receive summaries, transcripts, comments, or thumbnails in seconds.
Save $200+/year with Free AI Tools
Other tools charge monthly fees. NoteLM.ai is 100% free because it uses your own Gemini API key — which Google provides with generous free limits.
Otter.ai
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Notion AI
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$0 Forever
Unlimited use with free Gemini API
Frequently Asked Questions
Quick answers about NoteLM.ai's free YouTube tools
What is NoteLM.ai and what free YouTube tools does it offer?
NoteLM.ai provides 6 free YouTube AI tools: (1) YouTube Channel Analytics - analyze any channel's stats, engagement & estimated revenue, (2) YouTube Video Summarizer - Chrome extension for AI summaries with clickable chapters, (3) YouTube Transcript Generator - extract full transcripts with timestamps, (4) YouTube Comment Extractor - download all comments as JSON/CSV, (5) YouTube Thumbnail Downloader - get HD thumbnails in all sizes up to 1280×720, and (6) YouTube Subtitle Downloader - one-click SRT downloads. All tools are 100% free with no signup required.
Is NoteLM.ai completely free to use?
Yes, all NoteLM.ai tools are 100% free with no hidden costs. The online tools (transcript generator, comment extractor, thumbnail downloader) work instantly in your browser. For the Video Summarizer Chrome extension, you'll need a free Gemini API key from Google AI Studio, which provides 1,500 free requests per day — more than enough for daily use. No credit card is ever required.
How do I get a YouTube transcript for free?
Use our free YouTube Transcript Generator at notelm.ai/youtube-transcript-generator: (1) Copy any YouTube video URL, (2) Paste it into the tool, (3) Click "Generate Transcript" to extract the full text with timestamps, (4) Copy to clipboard or download as TXT/SRT format. Works with any video that has captions (auto-generated or manual). No signup or payment required.
What is the difference between YouTube transcripts and subtitles?
Transcripts are the full text of a video in readable document format — ideal for reading, studying, or SEO. Subtitles (SRT files) are formatted with precise timing codes for video players — used for adding captions to videos. NoteLM offers both: the Transcript Generator gives you readable text, while the Subtitle Downloader provides SRT files compatible with VLC, Premiere Pro, and all major video players.
What YouTube thumbnail sizes can I download?
Our YouTube Thumbnail Downloader offers all 5 standard sizes: maxresdefault (1280×720 HD - highest quality), sddefault (640×480), hqdefault (480×360), mqdefault (320×180), and default (120×90). All sizes available in JPG format, with WebP option for smaller file sizes. Perfect for social media, blog posts, video editing, and presentations.
What is the best YouTube thumbnail size for my channel?
The recommended YouTube thumbnail size is 1280×720 pixels (HD) with a 16:9 aspect ratio. This is what YouTube recommends officially. Use our thumbnail downloader to analyze competitor thumbnails or download HD versions for reference. For custom thumbnails, keep file size under 2MB and use JPG, PNG, or GIF format.
How do I get a free Gemini API key for the video summarizer?
Getting a free API key takes under 2 minutes: (1) Visit Google AI Studio at aistudio.google.com, (2) Sign in with your Google account, (3) Click "Get API key" in the left menu, (4) Click "Create API key" and copy it. The free tier includes 1,500 requests/day for Gemini 2.5 Flash. No credit card required — the key works immediately.
What are the Gemini API rate limits?
Google's free tier limits for Gemini 2.5 Flash: 1,500 requests per day, 15 requests per minute, 1,000,000 tokens per minute. For Gemini 2.5 Pro: 50 requests per day, 2 requests per minute. These limits reset daily at midnight Pacific Time. Most users never hit these limits with normal usage.
Start Using Free YouTube AI Tools Today
Join 50,000+ users who save hours every week. Summarize videos, download transcripts, extract comments — all free.