Any public YouTube URL
Paste the link to any public YouTube video, regular uploads, lectures, podcasts on YouTube, Shorts, or Live replays. AskSia transcribes the audio in minutes and returns a timestamped summary.
URL paste, no setup
AI YouTube Video Summarizer
Summarize any YouTube video, with every claim timestamped.
Paste a YouTube URL into AskSia and read a structured summary in seconds. Every claim links back to the exact second of the video, so you can read fast and check the source in one click. Lectures, Khan Academy, Crash Course, and educational creators in 40+ languages. Free to start.
対応PDFWordPowerPointMarkdownスキャン済みPDF・OCREPUBTXTCSVGoogle Docs
4.8 / 5 · 200万件以上 のドキュメントが 2000以上の大学で
asksia.ai/summarize
9ファイルインデックス済み
学習教材
アップロード
ライブラリ
選択されたファイル
Biology_Chapter_12.pdf
500p
Lecture_Slides_W6.pptx
Prof_Chen_Notes.docx
Handwritten_Review.pdf
OCR
Study_Guide.md
Problem_Set_5.pdf
Research_NeurIPS.pdf
Midterm_Review.docx
Tutorial_Slides.pptx
中間試験の学習計画 — 9つの全ファイルから
まず細胞呼吸とカルビン回路に焦点を当ててください — それらが教科書の大部分を占めています1と講義スライドです2。陳教授のノートは3つの一般的な試験の落とし穴を指摘しています3。
Biology_Chapter_12.pdf
1
5
Lecture_Slides_W6.pptx
2
Prof_Chen_Notes.docx
3
Handwritten_Review.pdf
4
Study_Guide.md
6
≡ 要約
学習ガイド
クイズ
フラッシュカード
PDF
Biology_Chapter_12.pdf
p. 217
Quick Answer
What is AskSia AI YouTube Video Summarizer?
AskSia AI YouTube Video Summarizer takes any public YouTube URL and produces a structured summary with timestamps on every claim. Hover a [N] citation to see the source moment with the transcript highlighted; click to jump into the YouTube video at that exact second. Useful for educational YouTube creators (Khan Academy, Crash Course, 3Blue1Brown, MIT OpenCourseWare), recorded class lectures uploaded to YouTube, and conference talks. 40+ languages with translation.
100
セッションあたりのファイル数
500p
教科書を一度に処理
OCR
ネイティブ、セットアップ不要
100%
回答はページに引用
Why AskSia
The YouTube summarizer built for studying.
Most YouTube summarizers paraphrase without timestamps. AskSia times-stamps every line back to the exact second, so you can verify, jump, and quote in one click.
Timestamped to the exact second
Every line of the summary carries a [N] marker with a YouTube timestamp. Hover to see the transcript at that moment. Click to jump into the YouTube video at that exact second.
Timestamped citations
Built for educational creators
Tuned for Khan Academy, Crash Course, 3Blue1Brown, MIT OpenCourseWare, and recorded course lectures. Handles technical vocabulary, names, and academic terms better than generic transcribers.
Educational creators
40+ languages with translation
Watch a Mandarin lecture or a Spanish tutorial on YouTube and read the summary in English with the original alongside. AskSia auto-detects the source language and runs translation in parallel.
Auto-detect plus translate
YouTube playlists, one chat
Drop a full YouTube playlist (a course, a series, a lecture week) and ask Sia to compare topics across episodes, find every mention of concept X, or build a cross-video study guide.
Playlist support
From YouTube to study pack
One click turns the summary into definition flashcards, a quiz, a study guide, or a visual concept map. Every card and question links back to the original YouTube timestamp.
Flashcards, quizzes, maps
How It Works
From YouTube link to timestamped summary in minutes.
Just paste the YouTube URL. No browser extension, no manual transcript copy.
Step 01
Paste the YouTube URL
Open the YouTube video, tap Share and Copy Link, then paste it into AskSia. Public YouTube videos transcribe directly from the URL.
ドキュメントをここにドロップ
PDF、Word、PPT、Markdown、スキャン、写真に対応
PDF
Biology_Chapter_12.pdf
500p
P
Lecture_Slides_W6.pptx
38
W
Prof_Chen_Notes.docx
12
MD
Study_Guide.md
4
9ファイル準備完了・最大100
Step 02
AskSia transcribes and indexes
AskSia transcribes the audio with speaker labels for up to 10 voices, identifies structure, and builds a timestamped citation index for the entire video.
並列でインデックス作成中
PDF
教科書のページ
完了
P
講義スライド
完了
W
教授のノート
完了
PDF
手書きの復習
OCR
MD
Markdown学習ガイド
閲覧中
100%
ページレベルの引用アンカーでインデックス化されたソース。
Step 03
Read, ask, export
Read the structured summary with [N] timestamp citations. Click any citation to jump into YouTube at that second. Ask Sia for flashcards or a quiz. Export as TXT, DOCX, SRT, or Google Docs.
中間試験のために何を最初に勉強すべきですか？
細胞呼吸から始めてください1とカルビン回路2。手書きの復習には比較表が追加されています4。
Biology_Chapter_12.pdf
p.217
元のページでハイライトされた参照された箇所。
Use Cases
How students summarize YouTube videos with AskSia.
Khan Academy and Crash Course
Paste a Khan Academy or Crash Course episode and AskSia returns a concept-by-concept summary with timestamps. Generate flashcards from the video and quiz yourself before the test.
Educational YouTube
MIT OpenCourseWare and university lectures
Drop an MIT OCW lecture, a Stanford lecture, or any university course on YouTube. AskSia summarizes with chapter-style timestamps and speaker labels, useful for self-study.
Open-courseware lectures
3Blue1Brown and explainer creators
Math, physics, and CS explainers on YouTube turn into clear summaries with proof outlines and example timestamps. Click any citation to jump straight to the visualization.
Math and science explainers
Recorded class lectures on YouTube
Many professors upload their recorded lectures to YouTube. Paste the link and AskSia summarizes with timestamps, ready for review, accessibility, and exam prep.
Class lectures
Foreign-language YouTube videos
Watch a French history channel, a Japanese tutorial, or a Mandarin course on YouTube and read the English summary alongside, with citations linking to the source moment in the original.
40+ languages
Conference talks and TED on YouTube
Drop a YouTube conference talk or a TED video and AskSia summarizes with speaker-labeled timestamps, useful for citation-ready quotes and research notes.
Conferences and TED
比較
AskSia vs. NotebookLM、
ChatPDF、ChatGPT。
ほとんどのAIドキュメントツールは1つのファイル用に作られています。AskSiaは学生が一度にライブラリ全体を学習できるように作られています。
| 機能 | AskSia | NotebookLM | ChatPDF | ChatGPTファイルアップロード |
|---|---|---|---|---|
| セッションあたりの最大ファイル数 | ✓ 100 | ~ 50 | 1 | ~ 10–20 |
| スキャン済みPDFのネイティブOCR | ✓ 自動、セットアップ不要 | ~ 限定的 | ✗ | ✗ |
| 手書きノート認識 | ✓ 40以上の言語 | ✗ | ✗ | ✗ |
| 混合フォーマットセッション（PDF+PPT+DOCX+MD） | ✓ 一度にすべて | ~ 部分的 | PDFのみ | ✓ |
| ソースページへのホバーハイライト | ✓ ビジュアルプレビュー | ~ 引用のみ | ~ ページ参照 | ✗ |
| 500ページの教科書を一度に処理 | ✓ チャンク分割なし | ~ サイズ制限あり | ~ サイズ制限あり | ✗ 切り捨て |
| ドキュメントを横断した質疑応答 | ✓ 統合された回答 | ✓ | ✗ 単一ドキュメント | ~ 低下 |
| 自動フラッシュカードとクイズ | ✓ ワンクリック | ✗ | ✗ | ✗ |
| 無料で開始、クレジットカード不要 | ✓ 100ファイル無料 | ✓ | ~ ファイル1つ無料 | ✗ Plusが必要 |
FAQ
Common questions about YouTube summarizing.
How do I summarize a YouTube video with AskSia?
Open the YouTube video, tap Share and Copy Link, then paste the URL into AskSia. The AI transcribes the audio, identifies up to 10 speakers, and returns a structured summary with timestamps on every claim. Hover any [N] to see the transcript at that moment; click to jump into the YouTube video at the exact second.
Does AskSia work with all YouTube videos?
AskSia summarizes public YouTube videos directly from the URL. For unlisted or private YouTube videos, you can save the MP4 from your own channel or your account's subscriptions and upload the file. AskSia handles the upload the same way and produces the same timestamped summary.
How accurate are the YouTube summary and timestamps?
On clear YouTube audio, AskSia transcribes at 95 percent or higher accuracy. The model handles technical vocabulary, names, and academic terms well, which is useful for educational creators. Timestamps are precise to the second, and every claim is grounded in a [N] citation linking to the source moment.
Can AskSia summarize long YouTube lectures?
Yes. The free plan covers YouTube videos up to 30 minutes per file. AskSia Pro and AskSia Super remove the duration cap, useful for full-length university lectures, multi-hour conference talks on YouTube, and complete course playlists.
Can I summarize a whole YouTube playlist?
Yes. Drop the playlist URLs into one session and AskSia handles each video, then lets you ask cross-video questions like 'which lecture covers X?' or 'compare what each video says about Y'. Synthesized answer with per-video timestamps.
Can AskSia summarize YouTube videos in other languages?
Yes. AskSia summarizes YouTube videos in 40+ languages and detects the source language automatically. You can also translate the summary at the same time, so a Spanish, Mandarin, or French video can be read in English alongside the original, with timestamps preserved.
Can I export the YouTube summary?
Yes. Export the summary as TXT, DOCX, PDF, SRT subtitles, or send to Google Docs or Notion. SRT subtitles are useful for adding captions to your own YouTube uploads. Citations and timestamps are preserved in the export.
Start Today
Paste a YouTube link. Read the lecture in minutes.
Whether Khan Academy, MIT OpenCourseWare, a recorded class lecture, or a conference talk, AskSia summarizes any YouTube video with every claim cited to the exact second.
AskSia学習ライブラリから
大学・試験別の学習リソース
科目別のコースガイド、共有ノート、試験対策をまとめています。所属大学または受験する試験から探しましょう。
AUオーストラリア
University of Sydneyの学習リソースUniversity of Melbourneの学習リソースMonash Universityの学習リソースUNSW Sydneyの学習リソースUniversity of Technology Sydneyの学習リソースUniversity of Adelaideの学習リソースAustralian National Universityの学習リソースRMIT Universityの学習リソースGriffith Universityの学習リソースFlinders Universityの学習リソースQueensland University of Technologyの学習リソースUniversity of Newcastleの学習リソースMacquarie Universityの学習リソースUniversity of Queenslandの学習リソースCharles Sturt Universityの学習リソースVictoria Universityの学習リソース
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