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Download any video in 4K. Extract audio. Grab subtitles. AI-powered course finder. 30+ tools — completely free.
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Everything you wish YouTube had — download, analyze, learn, create.
Core download & extraction tools
Download any YouTube video in 720p, 1080p, 4K, or 8K. No quality limits, no watermarks, no speed throttle.
Pull audio as MP3 (320kbps) or lossless FLAC. One click on any video. Perfect for podcasts and lectures.
Download video thumbnails in all resolutions — including the max-res version YouTube hides from you.
Download captions in SRT, VTT, or plain text. Supports auto-generated captions in 100+ languages.
Describe what you want to learn and AI finds the best courses, tutorials, and playlists ranked by quality.
Clip any section before downloading. No need to download 2 hours for a 30-second moment.
Read the entire video as searchable text with clickable timestamps. Find anything instantly.
Auto-translate subtitles to 50+ languages. Watch any video in your native language.
Download entire playlists in one click. Auto-sync — new videos added to playlist download automatically.
Convert any video moment into a high-quality GIF. Custom size, framerate, and duration.
Drop any YouTube link into CandleTube. We detect the video instantly.
Download, extract audio, grab subtitles, get AI summary — choose from 30+ tools.
Results in seconds. No signup required for free tools. No watermarks.
Real components. Real data. This is what your learning experience looks like.

variables, data types, functions, loops
In Python, what is the correct way to define a function that accepts any number of keyword arguments?
Front
What is the difference between a list and a tuple in Python?
Question 1/5 — Based on the video:
What keyword is used to define a function in Python?
def is Python's keyword. At timestamp 9:15 the instructor shows: "def greet(name): ..."Download free. Go Pro for unlimited access to all 30+ tools.
Core download tools
Unlimited everything
Yes. Core features — HD/4K download, MP3 extraction, thumbnails, subtitles, transcript viewer, GIF maker, sponsor skipper, loop, speed control, bookmarks — are 100% free forever. No limits, no watermarks. Pro features (AI tools, batch ops) are $5/month.
Describe what you want to learn in plain English like 'teach me React from scratch' or 'advanced photography composition'. Our AI searches YouTube, analyzes video quality, reviews, and content depth, then ranks the best courses and tutorials for you.
Chrome, Edge, Brave, and all Chromium-based browsers. Firefox support is coming soon. Uses Manifest V3 for maximum security and performance.
Most downloaders only download. CandleTube has 30+ tools: AI course finder, transcript search, video comparison, channel analytics, subtitle translation, auto-clipper, and more. It's a full YouTube intelligence platform.
Yes. Free tier supports playlist download. Pro tier adds auto-sync — new videos added to the playlist are automatically downloaded.
Absolutely. All features work on regular videos, Shorts, and live streams. Download, clip, extract audio — everything works everywhere.