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Questi

Understand solutions through diagrams and graphs.

Automatically chooses diagrams or interactive visuals for the question.

Explore concepts and changes with interactive visuals.

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Create cards from an image

Open concept card

Key concepts organized by subject and unit, one card each.

Upload a problem or textbook image. AI automatically determines the subject and card type (concept or skill). This uses {credits, number} credits.

Create your own concept card from materials such as a book PDF or an image.

My Concepts

Concept Cards

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Your material is compared with about {count} problems, one by one

The Questi DB holds about {percent}% of commercial textbooks

Compared with Questi's extensive problem database

The problems I upload were written by me or I hold their copyright. Works by other people cannot be certified.

I wrote this material myself

Certification only covers the comparison with the Questi database (about {percent}% of commercial textbooks, official past exams and more, about {count} problems). It does not guarantee that no identical problem exists in materials outside the database.

I understand the scope of the check

Confirmations (required)

Upload an exam or workbook you wrote yourself. The check is free.

Material to check

{count}/{max}

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Drag files here or click to choose

Upload an exam or workbook and Questi compares it with its database problem by problem and page by page to make sure nothing was copied from other materials. If it passes, you receive a free certification mark that anyone can verify.

Prove your original exams with a copyright certification

Pass both reviews to receive a Questi copyright certification mark that anyone can verify.

Certification mark

Each page is checked to see whether its set of problems and layout were copied from another material.

Round 2: page review

For every problem, similar problems are found in the Questi DB and checked one by one for identical content.

Round 1: problem review

Each page of your file is read and split into individual problems.

Split into problems

How the check works

Recent checks

Untitled material

Compared with the Questi database, no problems or page layouts copied from other material were found. Share the verification link so that anyone can confirm the certification.

Questi copyright certification granted

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Parts of this material overlap with other materials in the Questi database, so certification is on hold. Check the overlapping problems and pages in the detailed report below.

Certification on hold

The address may be wrong, or this check belongs to another account.

Result not found

{count, plural, one {# page layout violation} other {# page layout violations}}

This can take a few minutes depending on the number of problems. The check continues even if you close this page, and you can find it again under Recent checks.

Checking your material

Waiting for the check to start

Detailed copyright check report

Detailed report

Summary

Copyright check result

{count, plural, one {# suspected violation} other {# suspected violations}}

COPYRIGHT CERTIFIED

QUESTI CERTIFICATION

It is issued when material a teacher wrote is compared with the Questi database of commercial textbooks, official past exams, private mock exams, school exams and textbooks, and no problems or page layouts copied from other material are found. Easy standard problems that appear in many books are marked as notices.

What is Questi copyright certification?

Please check the certificate number. The address may be wrong, or the certification may have been revoked.

This certificate number cannot be verified

Copyright certificate check

This material passed both the problem review and the page review of the Questi copyright check.

Valid certificate

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Interactive learning material

Fullscreen interactive learning material

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Find card ideas on pages {from}–{to}. Analysis starts after payment.

Analyze lesson pages

Only selected cards will be made. Finished cards go into the book folder in your collection.

Make {count} selected cards

{book} pages {from}–{to}

Lesson title

Leave blank to use the book and page range

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Checking the cost

Choose today’s page range.

The book, page range and conversation so far will be cleared. Card lists and cards you already made stay in your collection.

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From your book to a card lesson

Pikaju · Lesson assistant

This PDF has {pages} pages. Prepay the analysis fee and {credits, number} credits for the first card. Analysis fees are non-refundable; only the card fee is refunded if no candidates are found or creation fails.

Register PDF book

School Exam DB

{conversationType, select, drill_exam {Tell me the units and difficulty you want. I will help from finding problems to finishing the exam.} textbook {Tell me the units and question counts you want. I will help organize the problems and finish the workbook.} other {Tell me what you want to create. I will help from start to finish.}}

{conversationType, select, drill_exam {Shall we build a drill exam together?} textbook {Shall we build your own workbook together?} other {Shall we create something together?}}

Select a previous conversation to continue it.

Conversation history

Search status

Problem Bank AI

These students will no longer be able to access this exam or submit answers. Existing submissions will be kept.

Revoke access for {count} students?

Manage assignments

Book chat

Read problems like a workbook page and ask the AI — "pick 5 easy problems" — to choose for you.

Book chat view is new

Book chat counts toward your Questi usage, so it is not available on the Free plan.
Credits alone do not unlock it.

Available on Basic and above

Active tasks

Top up your usage or upgrade your plan to keep using book chat.

Your Questi usage is used up

Try changing folder/tab/search conditions
or create a new DB.

No items match your conditions

No public problems match your current conditions.

No public DB problems to show.

Select one to add it to the active condition group.

Frequently used conditions

All conditions within a group must match; matching any one group is enough.

Problem search conditions

Choose where to search first. The conditions below apply within the selected database.

Search scope

Problems or folders you share will appear here.

No shared-by-me problems.

Problems or folders shared by others will appear here.

No shared-with-me problems.

Select Yes to apply your changes, or No to close without applying them.

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Locked problem

Exams used in (most recent)

Untitled exam

Choose candidates to create your own exam.

You have {count} exam candidates!

{itemCount} candidates · {selectedCount} selected

Create exam

You can register problems from the My DB card menu.

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You can register your exams from the exam history page.

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Other users can save this problem to their DB for free.

Other users can save this exam and its problems for free.

Other users can save this problem to their DB after paying the credits you set.

Other users can save this exam and its problems after paying the credits you set.

Free items can be copied immediately. Paid items charge the buyer and credit the seller when purchased.

Choose whether other users can copy this problem for free or by paying credits.

Choose whether other users can copy this exam and its problems for free or by paying credits.

Register exam to Community DB

Register to Community DB

Subject

Copy problems shared by other users into your DB for free or with credits.

Community DB

Shown in the free DB for Gwangju members. It will not appear in the Jeonnam/Gwangju DB.

Standard analysis costs {standardCredit} credits per problem. Endnote-processed HWP/HWPX files cost only {endnoteCredit} credits per problem.

Credit usage

Upload the problem files you want to add to your DB.

File upload

During the event, each upload analysis type is charged at the displayed event price instead of the regular price.

Problem DB upload discount

Analysis and tagging of extracted problem-solution pairs

HWP · HWPX

The {taggingCredit}-credit tagging rate cannot be applied because this file has no endnote-paired problem and solution. Convert it to PDF and continue at the image/PDF analysis rate of {analysisCredit} credits per problem?

No endnote-paired problems and solutions found

Segmentation, analysis, tagging, and solution generation

Image · PDF

Review and select segmented image/PDF problems or problem-solution pairs extracted from an endnote-processed HWP/HWPX file.

Convert the selected pages into images and add them to the upload list.

Select PDF pages

Automatically saves successfully analyzed problems as a new exam. You can continue editing it from your exam/textbook history.