Text explanation
Highlight language and define it in context.
Kith explains the selected phrase using the document around it, so the meaning matches the source instead of a generic dictionary entry.
Source-linked clarity for serious reading
Explain exactly what you’re looking at.
Select a dense phrase or mark part of a diagram. Kith explains it using the surrounding page, keeps the answer tied to its source, and saves what matters.
Runs only when you invoke it · Review what is sent · Delete saved knowledge anytime
Context-aware explanations
Server-side analysis through Kith backend
Private archive and account controls
On-page explainers
Text and diagrams, explained side by side.
Kith handles both selected text and highlighted diagram regions, then keeps each explanation card anchored to exactly what you marked.
Diagram explanation
Mark a module and explain what it does.
Kith reads the highlighted region as part of the whole diagram and returns a clear explanation of the selected component’s role in the system.
Why Kith
Explanations in place—not another workspace.
Context is everything. Kith understands that a cell means something different to a biologist than it does to a developer. It reads the surrounding context of your document to provide the depth you need, exactly when you need it.
Read through technical language
Highlight terminology from medical research, code refactoring, legal compliance, or design theory without losing the page you are already reviewing.
Text
Selection plus surrounding context
Inspect visuals in place
Use marked-region capture for charts, medical diagrams, interfaces, blueprints, and other visuals whose meaning is hard to explain with text alone.
Vision
Visual analysis in MVP
Build a personal encyclopedia
Save the explanations worth keeping so repeated concepts accumulate into a private reference library instead of vanishing with the tab.
Archive
Saved explanations tied to source context
Built for professionals
The knowledge layer your workflow is missing.
Every profession runs on specialised language and dense visuals. Kith sits inside the browser so answers arrive where you already work — no app-switching, no copy-paste, no context lost.
Understand without interruption
Contracts, research papers, API docs, medical reports — professionals encounter unfamiliar terms daily. Kith reads the surrounding context and returns a precise explanation without a single tab switch.
Before
Open a new tab, search, scan results, lose your place, repeat.
With Kith
Highlight the term, read the answer in a card, stay on the page.
Decode visuals instantly
Engineering drawings, medical imaging, financial charts, design mockups — visuals carry meaning that text search cannot reach. Kith's vision mode analyses the selected region in place.
Before
Screenshot the diagram, paste it into a chat tool, wait for an answer.
With Kith
Draw a region on the diagram and read the explanation right there.
Remember what you learned
Every explanation you save becomes a permanent reference tied to its original source and context. Over time, your Archive grows into a personal knowledge base shaped by your actual work.
Before
Look up the same concept again next week because the old answer is gone.
With Kith
Open the Archive, find the saved card, and pick up where you left off.
Built for dense, consequential material
Trace a contract clause
Understand a technical diagram
Build a sourced research glossary
Why Kith instead of another chat?
The evidence stays in view.
Kith starts with the exact phrase or region you choose, shows the page evidence behind the answer, and preserves the source when you save it.
Precise invocation
Analyze one phrase or visual region instead of handing over an entire browsing session.
Page-bound evidence
Separate what the page supports from what the model infers, then jump back to the supporting passage.
Durable knowledge
Save the explanation with its URL, captured context, notes, and tags—not as a disposable chat thread.
How it works
Four steps from install to repeat use.
The flow is short by design so the extension can disappear behind the work instead of becoming another system to manage.
Install the extension
Add Kith to your browser with a single click from this site.
Sign up with your email
Enter your email to start a 3-day free trial instantly. No credit card required.
Highlight or frame
Select text or mark a visual region when the page gets dense enough to slow you down.
Save what matters
Store the recurring explanation in your Archive so the next pass starts with context already in hand.
The Archive
Your reference layer as you read.
Build your personal encyclopedia. Every encounter is indexed. Kith transforms your reading history into a searchable, private asset for a lifetime of reference.
Cognitive Dissonance
Behavioral science
Grid Inertia
Energy systems
Dependency Inversion
Code refactoring
Chain of Custody
Legal compliance
Plans
Start free. Upgrade when you need to.
A 3-day trial with full access, no credit card. Starter and Pro plans scale with your daily reading and visual analysis volume.
Trial
Free$0 for 3 days
12 text + 2 vision requests per day
Starter
$5 /month
40 text + 10 vision requests per day
Pro
Popular$19 /month
120 text + 30 vision requests per day
Trust and operations
Built to be audited, not hidden.
Every part of Kith that touches your data is explicit. No silent background activity, no buried settings, no surprises.
Server-side analysis
All model requests route through the Kith backend. The extension never contacts any AI provider on its own.
Visible account state
Plan tier, daily quotas, and live usage are shown on the account page—nothing runs behind a hidden meter.
Scoped data input
Only the text or image region you select is sent for analysis, along with minimal page context. Nothing else leaves your browser.
Separate billing
Checkout and subscription management happen outside the extension through a dedicated billing portal.
Questions, answered plainly
Before you give an extension access.
What is Kith?
Kith is a Chrome, Edge, and Brave extension that explains selected text and marked visual regions in the context of the page you are already reading.
How is it different from a dictionary or generic AI chat?
Kith uses your exact selection plus nearby headings and text, distinguishes page evidence from model inference, and keeps saved answers linked to the source.
Can it explain diagrams, charts, or screenshots?
Yes. You can mark a visible region and Kith analyzes only that captured region with minimal page context, within your plan limits.
What data is sent?
Only after you invoke Kith, it sends the selected text or marked image region plus limited surrounding context through the Kith backend. Site rules and private mode remain under your control.
Latest update · July 2026
Evidence you can inspect.
Kith now shows supporting page excerpts, labels the answer boundary, keeps recent explanations in a side panel, and exports source-linked Archive entries.
Practical guides
Methods you can verify against the source.
Original, evidence-oriented workflows for three kinds of difficult reading.
Contract clauses
Find operative language, definitions, exceptions, and questions that need qualified counsel.
Read the guideTechnical diagrams
Interpret boundaries, labels, flows, dependencies, and uncertainty in one selected region.
Read the guideResearch glossaries
Build portable definitions with evidence, source identity, notes, and recurring concepts.
Read the guideReady to start
Add Kith to your browser in seconds.
Install the extension, sign up with your email, and start a free 3-day trial. Your account, billing, and usage all live on the web — the extension stays focused on your reading.
Three steps
Install. Sign up. Start working.
- Click Add to Chrome to open Kith’s verified Chrome Web Store listing.
- Enter your email on the access page to create your account.
- Your 3-day free trial starts immediately — upgrade anytime for more capacity.