Tell an LLM what matters in plain English. Highlight can mark the exact passages on a web page or PDF, keep them in your library, and share the result with one live link.
The shortest path from something worth reading to something worth keeping.
One live link opens a clean gallery of your passages, notes, and tags. No extension or account needed.
02Pair the secure MCP connection, then ask for limitations, evidence, definitions, or anything else. The agent saves the exact passages.
03Give Deep Read a topic or question. It marks the useful parts so you can inspect the evidence in context.
04Colours, notes, tags, drawing, AI highlighting, and sharing in one selectable viewer.The gallery works for everyone; PDF replay needs Highlight and access to the source.
A focused reading toolkit for capturing, organising, understanding, and sharing what matters.
Custom palette with text + background per swatch. Hover any highlight to re-colour or remove it instantly.
Select exact quotes in the Library, stage them for a chat, then create, move, rename, or merge folders with reversible MCP tools.
Pen, line, and rectangle tools for marking up diagrams, screenshots, or PDFs in place.
Anyone gets the clean gallery. Extension users can replay the highlights on the original web page or PDF.
Open PDFs in a selectable reader, highlight and annotate them normally, or choose Deep Read to find materially important passages. Share a gallery that works for anyone; recipients with Highlight can also reopen the source PDF with highlights in context.
Pair ChatGPT or another OAuth-capable MCP agent with a one-time code. Ask it to highlight limitations or evidence, organise selected Library quotes, compare sources, export research, and share the result.
The agent does more than read a page. It can work with your current tab, your private highlight library, and the live links you deliberately publish.
Ask in natural language: collect evidence, compare sources, tidy tags, export notes, or prepare a gallery.
An OAuth connection carries a structured request to the paired Highlight extension in Chrome.
See the highlight on the source page, find it in your local library, undo changes, or publish only what you choose.
Chrome stays in the loop, mutations are reversible, and the agent uses stable highlight IDs for precise edits.
Give the agent a goal. Highlight provides the browser actions, saved context, and reversible operations needed to complete it.
Turn an open article into structured evidence without manually copying passages between tools.
“Highlight the claims about adoption, tag them ‘evidence’, and add a short page summary.”
get_active_page→highlight_passages→add_page_noteSearch your saved research, compare selected pages, preserve context, and export a clean source-backed brief.
“Compare my highlights on AI browsers, flag disagreements, and export the result as Markdown.”
search_highlights→compare_pages→export_highlightsPackage selected highlights into a controlled gallery, invite reactions, then refresh or revoke the link.
“Create a private live link called ‘Launch research’ and show me new comments.”
create_live_link→collaborate_on_live_link→manage_live_linksHuman-readable capabilities with the exact tool names agents discover.
get_active_pageRead the active tab, selection, title, URL, and highlight count.get_pdf_documentRead page-numbered text from a PDF open in Highlight's reader.get_highlighted_textRetrieve saved quotes, notes, and tags from an open page.get_highlight_contextRead the live text surrounding one saved highlight.search_highlightsSearch quotes, notes, tags, titles, URLs, domains, and dates.list_highlighted_pagesBrowse the private library with counts, tags, notes, and dates.get_library_selectionLoad the exact highlights staged from the Library for an agent.list_foldersInspect folders, counts, sources, and optional sample highlights.open_highlightOpen a source page and scroll back to a saved passage.highlight_selectionSave the text currently selected in Chrome.highlight_passagesMark exact quoted passages with colour, tags, and notes.capture_snapshotFreeze a quote and its surrounding context for later.add_page_noteAttach an overall note or summary to a saved page.update_highlightChange colour, notes, or tags using stable IDs.bulk_tag_highlightsAdd or remove tags across several highlights at once.organize_foldersCreate, move, rename, merge, or remove folders reversibly.remove_highlightsExplicitly remove selected highlights in a reversible operation.restore_highlightsUndo a create, edit, removal, tag, snapshot, or page-note change.summarize_highlightsRetrieve matched source passages for a linked synthesis.compare_pagesBring highlights from multiple pages together for comparison.export_highlightsExport Markdown, JSON, CSV, BibTeX, RIS, Obsidian, or Notion.create_live_linkPublish an unlisted or private gallery with optional password and expiry.manage_live_linksList, refresh, rename, protect, expire, or revoke galleries.collaborate_on_live_linkRead discussion or add an attributed comment or reaction.Add the public Highlight MCP endpoint once, pair it to your browser with a one-time code, and the agent can use all 24 browser tools without receiving your private browser token.
No terminal, API key, or server configuration is required. Highlight handles the browser connection and endpoint.
Install the public Highlight plugin, or add https://highlighter-share.finnjclancy.workers.dev/mcp as a Streamable HTTP MCP server.
Press Connect. ChatGPT opens Highlight's secure authorization page and registers its callback automatically.
Open the extension, press ? beside Agent connection, then choose Pair ChatGPT. The one-time code is copied automatically.
Paste the one-time code into Highlight's authorization page and connect. It expires after 10 minutes and cannot be reused.
Start a new conversation, open the tools menu, and add the Highlight connection so the agent can choose its MCP tools.
Keep Chrome and Highlight running, open a normal web page, then give the agent a browser task. Highlights appear directly on that page.
Open an ordinary HTTP(S) article in Chrome and send this prompt:
Generate a fresh pairing code, keep the Highlight agent row connected, and confirm the target is an ordinary web page or Highlight PDF Reader. Browser extensions cannot run on internal pages such as chrome://extensions.
Compound interest is interest accumulated from a principal sum and previously accumulated interest. It is the result of reinvesting or retaining interest that would otherwise be paid out.
The effect of compounding depends on the frequency at which interest is compounded and the periodic interest rate which is applied. Therefore, in order to define accurately the amount to be paid under a legal contract with interest, the frequency of compounding (monthly, yearly, etc.) and the interest rate must be specified.
Compound interest is contrasted with simple interest, where previously accumulated interest is not added to the principal amount of the current period.
Anyone with the extension can install it, highlight a page, and share a link — instantly. Anyone can open a share link and read the quotes. No email, no password, no profile. Ever.
From study groups working through a science article to research teams annotating a financial report. Or just you, building a personal knowledge garden one quote at a time.
Share key passages from a Wikipedia article with your classmates. Comment on the tricky bits. One folder per course, one link per study session.
Highlight financial reports, research papers, or news pieces with your team. Tag every quote by theme. Export folders as Markdown straight into your shared docs.
Track everything you're reading on a topic. Folders by subject, comments so you remember why each quote mattered, export when you're ready to write something with it.
Install once, then highlight as you read. Your library is local-first, with network features used only when you choose them.
Add Highlight to Chrome or Edge, pin it to your toolbar. Ready instantly — no account, no sign-in.
Select text on a page or PDF → tap a colour. Or, after reviewing the disclosure, choose Deep Read for optional AI suggestions.
Click Share → name the collection → copy. One short link works for anyone, with or without the extension.
No accounts or telemetry. Optional network features are clearly disclosed.