Turn any lecture into a study set
Paste a link. Welto transcribes the video, then builds a quiz and flashcards from what was actually said, so you can test yourself instead of rewatching.
Study, don't rewatch
Testing yourself beats replaying the video at 2x.
Lectures
Turn a two-hour recording into a set you can actually revise from.
Exam prep
Test yourself on questions drawn from your material, not from a generic bank.
Language learning
Pull the useful vocabulary out of a video, with meanings and example sentences.
Online courses
Keep what you learned from a course after the video ends.
How it works
Paste a link
Any YouTube, TikTok or podcast link, or upload a lecture recording of your own.
We build the set
Welto reads the transcript and writes a quiz and flashcards grounded strictly in it.
Study and repeat
Work through the cards, take the quiz, then come back to the parts you missed.
Anyone can summarize. We put your language on the video.
Translated subtitles
On screen while you watch, or exported as SRT and VTT.
Bilingual synced reader
The original and your language together, in step with playback. Tap any word.
Summary, notes, flashcards, quiz
Table stakes. Welto does these too, in your language.
Questions
A multiple-choice quiz with an explanation for each answer, and a deck of term-and-definition flashcards. From the same video you can also generate notes, a mind map and a longer practice exam.
Everything is grounded strictly in the transcript, and the model is instructed never to invent facts. If the video says it, a question can test it. Anything that still looks off can be regenerated.
Yes. Welto can build the set in any of 50+ languages whatever language the video is in, so you can study an English lecture in Uzbek.
The free plan includes one study set a month, from up to 3 videos a day. Pro removes that limit and adds unlimited uploads.
Study from the video, don't just watch it
Paste a link and build your first set free.
Build my study set