Best AI YouTube Summarizers (2026): 10 Free Tools Tested

Price: Free | Best for: Students and researchers who want unlimited free summaries

Glasp’s Chrome extension sits directly on the YouTube page and generates a transcript plus AI summary with one click. It connects to ChatGPT, Claude, Gemini, or Mistral to produce the summary, so you choose which AI model processes your content.

The social layer is what makes Glasp different. You can highlight sections of the transcript, save notes, and see what other users highlighted on the same video. For research teams and study groups, this turns individual video watching into shared knowledge.

What works well:

• Unlimited free summaries (no monthly cap)
• Choose your AI model (ChatGPT, Claude, Gemini, Mistral)
• Highlight and annotate directly on transcripts
• Export notes to Notion, Obsidian, or Readwise
• Community highlights from other users

Where it falls short:

• Requires a free account to save highlights
• Summary quality depends on which AI model you choose
• No built-in ASR for videos without subtitles

Price: Free (3/week) | Pro: $4.99/mo annual, $9.99/mo monthly | Best for: Daily YouTube users who want fast overviews

Eightify adds a “Summarize” button to every YouTube page. Click it, and you get timestamped bullet points in about five seconds. Each bullet links back to the exact moment in the video, so you can jump to any section that looks interesting.

Over 100,000 people use Eightify, and in our tests it was the fastest Chrome extension. The summary format is clean, scannable, and includes just enough detail to decide if a video is worth watching in full.

What works well:

• Fastest summary generation (under 5 seconds)
• Timestamped bullets link back to video
• Clean, scannable output format
• Works on videos up to 8 hours
• Share summary links with others

Where it falls short:

• Free tier is only 3 summaries per week
• Pro at $9.99/mo monthly is steep for casual users
• No transcript export on free plan

Price: Free (15/mo) | Paid from $2.99/mo | Best for: Non-English content and subtitle-based summarization

NoteGPT is a strong option if you work with videos in multiple languages. It pulls subtitle data from YouTube, translates it, and generates summaries in your preferred language. The Chrome extension and web tool both work, and you can batch-summarize up to 20 videos at once.

For the “free AI YouTube summarizer based on subtitles” use case, NoteGPT is our top pick. It reads existing YouTube subtitles or auto-generated captions and builds summaries from that text, which tends to produce more accurate results than audio-only processing.

What works well:

• Subtitle translation in 60+ languages
• Batch summarization (up to 20 videos)
• Both Chrome extension and web interface
• Affordable paid plans starting at $2.99/mo
• Mind map generation from video content

Where it falls short:

• Free tier limited to 15 summaries per month
• Premium AI models cost extra credits
• Interface can feel cluttered with features

Price: 100% free | Best for: One-off summaries when you don’t want to install anything

Summarize.tech is the simplest tool on this list. Paste a YouTube URL, click the button, and get a structured summary in 10-30 seconds. No account, no extension, no credit card. It works on any device with a browser.

The summaries are paragraph-style rather than bullet points, which some people prefer for getting the full picture. It handles videos up to 4 hours and uses auto-generated captions as the source text.

What works well:

• Zero setup - just paste and go
• No account or login required
• Works on mobile, tablet, and desktop
• Handles videos up to 4 hours
• Completely free with no hidden limits

Where it falls short:

• Paragraph format only (no bullet points or timestamps)
• Cannot customize summary length or style
• No way to save or organize past summaries
• English-focused, limited multilingual support

Price: Free (300 min/mo) | Lite: $6/mo | Pro: $20/mo | Best for: Videos that lack subtitles or auto-captions

TubeOnAI can summarize videos even when there’s no transcript available. It uses its own speech recognition to process the audio directly, which makes it useful for older videos, live stream recordings, or content in languages where YouTube’s auto-captions are unreliable.

The free tier gives you 300 minutes per month, which is enough for about 10-15 typical videos. The Chrome extension and web app both work well, and the output includes a summary, transcript, and mind map.

What works well:

• Summarizes videos without existing subtitles
• 300 free minutes per month (generous)
• Chrome extension and mobile apps available
• Mind map and transcript included
• Supports podcasts and uploaded files too

Where it falls short:

• Pro plan jumps to $20/mo after first month
• Audio-only processing is less accurate than subtitle-based
• Free tier has no voice chat or advanced AI features

Price: Free (dozens/mo) | Starter: $4.99/mo | Pro: $8.99/mo | Best for: International users working with non-English videos

Recapio processes videos in Spanish, French, German, Portuguese, and other languages while keeping cultural context intact. The free plan lets you create dozens of summaries per month and stores them in what Recapio calls your “AI Brain” - a searchable archive of everything you’ve summarized.

The Chrome extension adds a summary button directly to YouTube, and the web app handles URL-based summarization. Output quality was solid in our multilingual tests, though it struggled with heavy accents and overlapping speakers.

What works well:

• Good multi-language support
• Searchable summary archive (“AI Brain”)
• Both Chrome extension and web app
• Free plan is generous for casual use
• Organized storage for past summaries

Where it falls short:

• Accuracy drops with accents or background noise
• Paid plans add up for heavy users
• Less known than competitors, smaller community

Price: Free (GPT-4o mini) | Plus: $20/mo | Best for: Power users who want full control over summary output

ChatGPT isn’t a YouTube tool by itself, but paired with a transcript it becomes the most flexible summarizer available. Copy the transcript from YouTube (three dots > Show transcript), paste it into ChatGPT, and tell it exactly what you want: bullet points, study notes, action items, or a one-paragraph executive summary.

Prompt that works well for lectures:

Summarize this lecture transcript into:
1. Five main concepts with one-sentence explanations
2. Three exam-worthy questions
3. Topics that need further reading

Transcript: [paste here]

What works well:

• Complete control over format and depth
• Free tier available with GPT-4o mini
• Can extract specific information with targeted prompts
• Handles very long transcripts
• Works for any content type

Where it falls short:

• Manual process (copy transcript, paste, write prompt)
• No Chrome integration for YouTube
• Free model is less capable than GPT-4o
• No timestamps or video linking

Price: Free (limited) | Pro: $20/mo | Best for: Multi-hour videos and conference recordings

Claude’s 200,000+ token context window means it can process an entire 3-hour conference recording transcript without losing context. Where ChatGPT may hit length limits on very long content, Claude handles massive transcripts in a single pass.

For academic research, dissertation review videos, or all-day conference recordings, Claude produces summaries that track arguments and themes across the full length of the content. It’s particularly good at identifying how ideas connect across different sections of a long presentation.

What works well:

• Handles transcripts from 3+ hour videos in one pass
• Tracks themes across very long content
• Strong at academic and technical material
• Free tier available for testing
• Good at identifying connected ideas

Where it falls short:

• Manual transcript copying required
• No YouTube integration
• Free tier has daily message limits
• Slower output than dedicated summarizer tools

Price: Free (120 min/mo) | Pro: $8.17/mo annual, $15/mo monthly | Best for: Users who need both a transcript and a summary

Notta takes a transcript-first approach. It generates a detailed, speaker-identified transcript and then builds the summary from that text. This two-step process produces more accurate summaries than tools that skip straight to summarization, especially for interviews, panels, and multi-speaker content.

The 98.86% transcription accuracy claim held up well in our tests with clear audio. With background noise or heavy accents, accuracy dropped to around 85-90%, which is still competitive. Notta also integrates with Notion, Slack, and other productivity tools.

What works well:

• Industry-leading transcription accuracy
• Speaker identification for interviews and panels
• Integrations with Notion, Slack, and other tools
• Multiple summary formats (bullets, paragraphs, key quotes)
• Time-stamped summaries synced to video

Where it falls short:

• Free plan limited to 120 minutes and 3-minute files
• $15/mo monthly price is high for casual users
• Focused on transcription; summarization is secondary
• Mobile app is less polished than web version

Price: Free tier | Paid from $19/mo | Best for: Users who need summarization alongside recording and note-taking

ScreenApp’s AI summarizer combines video summarization with transcription, screen recording, and AI-powered note-taking in one platform. Upload a YouTube video or paste a URL, and ScreenApp generates a transcript, summary, and searchable notes.

What sets ScreenApp apart is the workflow integration. You can record a meeting, get it transcribed, summarize it, and share timestamped notes with your team - all without switching tools. The YouTube AI notetaker feature is built specifically for extracting structured notes from video content. There’s also a dedicated Chrome extension for summarizing videos if you prefer browser-based workflows.

What works well:

• All-in-one: record, transcribe, summarize, and share
• Automatic transcription with multiple language support
• Searchable, timestamped notes
• Chrome extension available
• Team collaboration features

Where it falls short:

• Paid plans start at $19/mo (higher than single-purpose tools)
• More features than you need if you only want summaries
• Newer summarization features still improving