URL or upload, both work
Paste a YouTube link, a Vimeo URL, a Khan Academy video, or upload an MP4 from your laptop or phone. AskSia handles both paths and produces a timestamped summary either way.
YouTube, Vimeo, MP4
LMS Integration
Uni & Course Analysis
Useful Tools
Resources
EN
AI Video Summarizer
Summarize any video, with every claim timestamped.
Paste a public video URL or upload an MP4, and AskSia returns a structured summary in seconds. Every claim carries a timestamp linking back to the exact moment in the video, so you can read fast and verify in one click. Lectures, online courses, conference talks, and educational creators. 40+ languages, free to start.
SupportsPDFWordPowerPointMarkdownScanned PDF · OCREPUBTXTCSVGoogle Docs
4.8 / 5 · 2M+ documents summarized by students at 2000+ universities
asksia.ai/summarize
9 files indexed
Study materials
Upload
Library
Selected files
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
Midterm study plan — from all 9 of your files
Focus on cellular respiration and the Calvin cycle first — they dominate your textbook1 and lecture slides2. Prof. Chen's notes flag three common exam traps3.
Biology_Chapter_12.pdf
1
5
Lecture_Slides_W6.pptx
2
Prof_Chen_Notes.docx
3
Handwritten_Review.pdf
4
Study_Guide.md
6
≡ Summary
Study guide
Quiz
Flash Card
PDF
Biology_Chapter_12.pdf
p. 217
Quick Answer
What is AskSia AI Video Summarizer?
AskSia AI Video Summarizer takes any video (from a URL or an uploaded file) 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 video at that exact time. Useful for online courses on Coursera, edX, and Khan Academy, recorded class lectures, conference talks, and educational creators on YouTube. Supports 40+ languages with translation.
100
files per session
500p
textbook in one pass
OCR
native, zero setup
100%
answers cited to page
Why AskSia
The video summarizer built for studying.
Generic video summarizers compress without showing where claims came from. AskSia time-stamps every line back to the exact moment in the source video.
Timestamped to the exact moment
Every line of the summary carries a [N] marker with a timestamp. Hover to see the source moment with the transcript highlighted. Click to jump into the video at that exact second.
Timestamped citations
40+ languages with translation
Watch a Mandarin lecture and read the summary in English, or a Spanish course and read it in French. AskSia auto-detects the source language and runs translation alongside.
Auto-detect plus translate
Speaker labels for every voice
AskSia identifies up to 10 distinct speakers in a video, color-codes their turns in the transcript, and shows which speaker each cited claim came from. Useful for panels, interviews, and debates.
Up to 10 speakers
Course playlists, one chat
Drop a full course's worth of lecture videos into one session. Ask Sia to compare topics across lectures, find which lecture covers concept X, or build a study guide that spans the whole course.
Course playlist support
From video to study pack
One click turns the summary into definition flashcards, a concept-check quiz, a study guide, or a visual concept map. Each card and question links back to the original video timestamp.
Flashcards, quizzes, maps
How It Works
From video URL to timestamped summary in minutes.
Paste, upload, or drag. No browser extension, no manual transcript copy, no per-video conversion.
Step 01
Paste the URL or upload the file
Drop a YouTube, Vimeo, or Khan Academy URL into AskSia, or drag the MP4, MOV, WEBM, or MKV file into the upload area.
Drop documents here
PDF, Word, PPT, Markdown, scans, and photos
PDF
Biology_Chapter_12.pdf
500p
P
Lecture_Slides_W6.pptx
38
W
Prof_Chen_Notes.docx
12
MD
Study_Guide.md
4
9 files ready · 100 max
Step 02
AskSia transcribes and indexes the video
AskSia transcribes the audio with speaker labels, identifies up to 10 distinct speakers, and builds a timestamped citation index across the whole video.
Indexing in parallel
PDF
Textbook pages
DONE
P
Lecture slides
DONE
W
Professor notes
DONE
PDF
Handwritten review
OCR
MD
Markdown study guide
READING
100%
Sources indexed with page-level citation anchors.
Step 03
Read, ask, and export
Read the structured summary with [N] timestamps. Ask Sia for flashcards, a quiz, or a study guide. Export as TXT, DOCX, SRT subtitles, or Google Docs.
What should I study first for the midterm?
Start with cellular respiration1 and the Calvin cycle2. Your handwritten review adds a comparison table4.
Biology_Chapter_12.pdf
p.217
Referenced passage highlighted on the original page.
Use Cases
How students summarize videos with AskSia.
Recorded class lectures
Drop a Zoom, Teams, or Panopto recording of a lecture and AskSia returns a structured summary with timestamps. Useful for review before exams, accessibility, and catching up on missed classes.
Class lectures
Coursera, edX, and Udemy
Paste a public Coursera, edX, or Udemy lecture URL (or upload the saved MP4) and AskSia summarizes it with timestamps. Generate flashcards from the video and quiz yourself afterward.
Online courses
Khan Academy and educational YouTube
Paste a Khan Academy video, a 3Blue1Brown explainer, or a Crash Course episode, and AskSia builds a structured summary with concept-by-concept timestamps and flashcards.
Educational creators
Conference and seminar talks
Drop a conference talk, a TED video, or a research seminar recording, and AskSia summarizes with speaker labels and timestamped citations, useful for research notes and quotes.
Conferences and talks
Foreign-language video
Watch a Spanish lecture, a Japanese tutorial, or a French documentary and read the summary in English with the original alongside. Citations link to the source moment in the original language.
40+ languages
Course playlist synthesis
Drop a full week of lecture videos into one session and ask 'compare what each lecture says about X' or 'find every mention of the Calvin cycle across the course'. Synthesized answer with per-video timestamps.
Cross-video Q and A
Compare
AskSia vs. NotebookLM,
ChatPDF, and ChatGPT.
Most AI document tools are built for one file. AskSia is built for students studying a whole library at once.
| Feature | AskSia | NotebookLM | ChatPDF | ChatGPT File Upload |
|---|---|---|---|---|
| Max files per session | ✓ 100 | ~ 50 | 1 | ~ 10–20 |
| Native OCR for scanned PDFs | ✓ Auto, no setup | ~ limited | ✗ | ✗ |
| Handwritten notes recognition | ✓ 40+ languages | ✗ | ✗ | ✗ |
| Mixed-format session (PDF+PPT+DOCX+MD) | ✓ All at once | ~ partial | PDF only | ✓ |
| Hover-to-source page highlighting | ✓ Visual preview | ~ citations only | ~ page ref | ✗ |
| 500-page textbook in one pass | ✓ No chunking | ~ size limits | ~ size limits | ✗ truncation |
| Cross-document Q&A | ✓ Unified answer | ✓ | ✗ single doc | ~ degrades |
| Auto flashcards & quizzes | ✓ One click | ✗ | ✗ | ✗ |
| Free to start, no credit card | ✓ 100 files free | ✓ | ~ 1 file free | ✗ Plus needed |
FAQ
Common questions about video summarizing.
How do I summarize a video with AskSia?
Paste a public video URL (YouTube, Vimeo, Khan Academy, course platforms) into AskSia, or upload an MP4, MOV, WEBM, or MKV file. AskSia transcribes the audio, identifies up to 10 speakers, and returns a structured summary with timestamps on every claim. Hover any [N] to see the source moment highlighted; click to jump to that timestamp.
What video formats and sources does AskSia support?
AskSia supports public YouTube, Vimeo, Khan Academy, and similar URLs, plus uploaded MP4, MOV, WEBM, MKV, AVI, FLV, and M4V files. There is no need to convert between formats. The free plan supports videos up to 30 minutes per file; Pro and Super remove the duration cap.
How accurate are the summary and timestamps?
On clear audio, AskSia transcribes at 95 percent or higher accuracy and uses context to handle technical vocabulary, names, and academic terms. Timestamps are precise to the second, and every claim in the summary is grounded in a [N] citation that links to the exact moment in the source video.
Can AskSia summarize long videos and full lectures?
Yes. AskSia handles full-length videos, multi-hour conference talks, and recorded lectures. The free plan covers videos up to 30 minutes per file; AskSia Pro and AskSia Super remove the duration cap. Course playlists and recorded series can be added together for cross-video Q and A.
Can AskSia summarize videos in other languages?
Yes. AskSia summarizes videos in 40+ languages and detects the source language automatically. You can also translate the summary at the same time, so a Mandarin or Spanish lecture can be read in English alongside the original. Citations link to the source moment in the original audio.
Can I export the summary as study materials?
Yes. One click turns the summary into definition flashcards, a concept-check quiz, a study guide, or a visual concept map. Each card and question links back to the source timestamp via the same citation system. Export as TXT, DOCX, PDF, SRT subtitles, or Google Docs.
Does AskSia work with private or paid course videos?
AskSia summarizes public video URLs directly. For private course videos, save the video as an MP4 from the platform (most learning platforms allow downloads through the official app or as part of a subscription) and upload the file. AskSia handles the upload the same way and produces the same timestamped summary.
Start Today
Paste a video link. Read the lecture in minutes.
Whether a recorded class, a Coursera lecture, a Khan Academy explainer, or a conference talk, AskSia summarizes any video with every claim cited to the exact second.
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