SynthIt
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AI learning workspace

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Turn anything into something you can learn.

Add a YouTube video, PDF, lecture, website, audio file, or document. SynthIt turns it into summaries, notes, flashcards, quizzes, mind maps, and answers — with every claim linked back to the source.

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Free plan, no credit card First summary in ~60 seconds Every answer cited
YouTubePDFLectureWebsiteAudioDocument
SummaryNotesFlashcardsQuizMind MapQ&A

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AI SummarizerStudy KitAI WriterAI Translator

An AI that sounds right and an AI that's cited right are two different things.

What makes SynthIt different

Every claim, cited back to the source

Generic AI summarizers write confident answers you have to take on faith. SynthIt matches every claim against your real source text server-side — so a wrong or invented citation can't slip through.

What the summary says

Get sunlight within 30–60 minutes of waking — it's the single biggest lever for anchoring your circadian rhythm.12:04

What's actually at 12:04 in the source

“If you do nothing else, get outside and get light in your eyes early. Everything downstream gets easier.”

From a video, that's a timestamp. From a PDF, it's a page number — click either and it jumps straight to the source.

And once everything's cited: Connections

Every source you add, linked together

Generic AI tools treat every upload as an island. SynthIt links the people, ideas, and claims across everything you've added — so you can ask what your sources agree and disagree about.

adviceSpeaker A12:04

Get sunlight within 30–60 minutes of waking — it's the single biggest lever for anchoring your circadian rhythm.

Andrew HubermanCircadian rhythmWhy We Sleep

Built-in spaced repetition

Every flashcard deck feeds a review queue scheduled with SM-2, so what you generate is what you actually remember.

From link to answer in three steps

1

Drop it in

A PDF, a YouTube link, a lecture recording, or an article.

2

Get a cited summary

The key points in seconds, each one linked to its exact source.

3

Ask, or study it

Chat for follow-up answers, or turn it into flashcards and a quiz.

Popular free tools to start with

No sign-up needed to try one. The full workspace is one click away once you see what it can do.

AI PDF Summarizer

Drop in a PDF, report, or textbook chapter. Get the key points in seconds, each one linked back to the exact page.

Try it

AI YouTube Summarizer

Paste any YouTube link. Get the key moments cited to the timestamp — no more scrubbing through a 2-hour video.

Try it

AI Flashcard Maker

Turn any document into a cited flashcard deck, ready for spaced review — not just a summary you forget by Friday.

Try it

Plus 32 more — quizzes, mind maps, study guides, translation, and more. Browse all tools →

Built for anyone with more to read than time to read it

Students

Turn a lecture recording or a textbook PDF into a cited summary and a quick self-test before the exam.

Professionals

Summarize long reports and calls into key points you can skim before a meeting, cited back to the source.

Researchers

Pull structured takeaways out of papers and interviews without losing the page they came from.

Creators

Turn a video or article into a script, a slide deck, or a translated version in minutes, not hours.

Simple, honest pricing

Start free. Upgrade only once an unlimited library is something you actually need.

Free

Try SynthIt on a handful of sources — no card required.

Free

  • ✓Up to 5 sources
  • ✓Cited summaries & answers
  • ✓Ask your sources anything
  • ✓Basic Study Kits — flashcards, quiz & mind map
  • ✓Notes & saved ideas

Pro

Recommended

For learning from anything, regularly.

$12.42/mo

$149 billed yearly

  • ✓Everything in Free
  • ✓Unlimited sources
  • ✓Complete Study Kits — summary, guide, flashcards, quiz & mind map
  • ✓Spaced-repetition review
  • ✓Podcast RSS feed import — whole shows, not one link at a time
  • ✓Priority processing — your jobs jump the queue
Get started

Cancel anytime. See how SynthIt compares with NoteGPT

Frequently asked questions

What is SynthIt?

SynthIt is an all-in-one AI learning workspace. Upload a PDF, video, lecture, article, or link and get summaries, chat, flashcards, quizzes, study guides, writing help, and translation from the same source.

How is SynthIt different from ChatGPT or other AI summarizers?

Every generated claim is cited back to the page or timestamp it came from, so you can verify it instead of trusting it. Citations are resolved on the server from your real source text, not written by the model, so they can't be invented.

What can I upload?

PDFs, Word, PowerPoint, Excel and EPUB files, images, web pages, plain text, YouTube links, and audio or video files.

Is SynthIt free?

Yes. The Free plan includes up to 5 items and needs no credit card. Pro is $19/mo for an unlimited library.

Can I cancel Pro anytime?

Yes. Cancel from the billing portal whenever you like; you keep Pro until the end of the period you paid for.

Are my documents private?

Your documents are only visible to your account and are never shown in public search results. See the Privacy Policy for details.

Start with one file.

Upload a PDF, paste a link, or drop in a video — SynthIt takes it from there.

Get started free