Summarize YouTube videos in one click. Get the key points with clickable timestamps and save hours. It uses AI to analyze video transcripts and generate comprehensive summaries that help you save time.

How does sumari.io work?

Simply paste a YouTube URL into sumari.io and our AI will analyze the video transcript to generate a comprehensive summary with clickable timestamps, key themes, and an executive summary. The process takes about 30-60 seconds.

What types of videos work best with sumari.io?

sumari.io works best with spoken content videos like podcasts, interviews, lectures, tutorials, and educational content. It can summarize any YouTube video with available captions or transcripts. Tutorial videos automatically get step-by-step guides.

Does sumari.io support tutorial videos?

Yes! sumari.io automatically detects tutorial content and generates step-by-step guides with timestamps, making it easy to follow along with how-to videos.

Can sumari.io summarize videos in other languages?

Yes, sumari.io supports videos in multiple languages. If a video has captions in another language, sumari.io will translate and summarize the content in English.

Can summarization fail?

Yes, summarization may fail if the video has no captions available, uses obscure languages, or is age-restricted/region-locked. Videos with auto-generated captions work best.

Terms of Service

Last updated: January 2026

Service Description

sumari.io is an AI-powered service that generates summaries of YouTube videos. We analyze video transcripts using artificial intelligence to create timestamped breakdowns, key themes, and executive summaries to help you understand video content quickly.

Acceptable Use

By using sumari.io, you agree not to:

Use the service for any illegal purpose or to process illegal content
Attempt to circumvent rate limits or abuse the service
Use automated tools, bots, or scrapers to access the service
Interfere with or disrupt the service or its infrastructure
Impersonate others or misrepresent your affiliation with any person or entity

Disclaimer

Summaries are AI-generated and may contain errors, inaccuracies, or omissions. We make no guarantees about the accuracy, completeness, or reliability of the summaries provided. AI can misinterpret context, miss nuances, or generate incorrect information. Always verify important information by watching the original video.

We are not responsible for any decisions made based on AI-generated summaries.

Intellectual Property

We do not claim ownership of the summaries generated for you. The original video content, including transcripts, belongs to the respective video creators and is subject to YouTube's Terms of Service.

You are responsible for ensuring your use of summaries complies with applicable copyright laws and the rights of content creators.

Limitation of Liability

THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.

IN NO EVENT SHALL SUMARI.IO BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES ARISING OUT OF OR RELATED TO YOUR USE OF THE SERVICE.

Usage Limits

sumari.io enforces a global daily usage limit to manage costs. When the daily limit is reached, the service will be temporarily unavailable until the next day. We reserve the right to modify these limits at any time.

Termination

We reserve the right to suspend or terminate access to the service for any user who violates these Terms of Service or abuses the service, without prior notice.

Changes to These Terms

We may update these Terms of Service from time to time. We encourage you to review this page periodically for any changes. Your continued use of the service after any changes constitutes acceptance of the updated terms.

Contact Us

If you have any questions about these Terms of Service, please contact us at hello@sumari.io.