Readwise website, digital highlights, Reader app, spaced repetition, note exports, Kindle, articles, PDFs, and knowledge management

Readwise

Readwise is a reading and knowledge-management website for collecting highlights, reviewing important passages, saving articles and documents in Reader, and syncing notes to other tools.

Main website

readwise.io is the public website for Readwise and Reader.

Core workflow

Readwise imports highlights from ebooks, articles, and other sources, resurfaces them for review, and can export notes to tools such as Notion, Evernote, and Roam.

Domain registered

August 28, 2017

Readwise official site icon used as the brand image for the reading and highlight-review website.View Readwise site icon

What Readwise is

Readwise official site presents Readwise as a website for revisiting and learning from ebook and article highlights. The service collects highlights into one library, resurfaces selected passages through a daily review, and helps readers organize what they want to remember. The Readwise App Store listing and Readwise Google Play listing show mobile app access for iPhone, iPad, Android phones, and tablets.

Highlights and review

Readwise is built around the problem of forgetting useful passages after reading. Users can import highlights from supported reading sources, tag them, add notes, search them, and review them later. The product describes this review process through spaced repetition and active recall, ideas commonly used to strengthen memory over time.

Reader and Readwise

Readwise also offers Reader, a read-it-later app for articles, newsletters, PDFs, EPUBs, and other saved content. Readwise documentation explains that Reader and Readwise are separate apps connected by the same account: highlights made in Reader sync to Readwise, and then can sync onward to connected note-taking tools.

Imports and exports

A major part of the Readwise website is moving reading data between services. The official site mentions imports from Kindle, Instapaper, iBooks, and other sources, while the docs describe ways to capture web-article highlights through Reader, mobile share sheets, browser extensions, and other reading apps. Export features help send highlights and notes into external knowledge systems.

Who uses Readwise

Readwise is used by readers who highlight often: students, writers, researchers, product people, software developers, newsletter readers, book collectors, and note-taking enthusiasts. It is most useful when someone wants a durable highlight library rather than a scattered set of notes trapped inside separate reading apps.

Why it matters

Modern reading is spread across ebooks, web articles, PDFs, newsletters, social posts, and saved links. Readwise matters because it treats highlights as a reusable layer of personal knowledge. The tradeoff is that users need to trust a third-party service with reading metadata and build habits around reviewing, organizing, and exporting what they save.

WHOIS domain data

Data pulled: May 24, 2026View current WHOIS record

Domain: readwise.io
IP address: 104.26.9.37
Registrar: NameCheap, Inc.
WHOIS server: whois.namecheap.com
Referral URL: https://www.namecheap.com/
Created: August 28, 2017
Updated: January 18, 2025
Expires: August 28, 2029
Nameservers: cory.ns.cloudflare.com (173.245.59.93); ines.ns.cloudflare.com (172.64.32.164)
Domain status: clientTransferProhibited
Contact privacy: Registrant, admin, and technical contact details are listed through Withheld for Privacy ehf.

Key concepts

Highlight libraryA central place where saved passages from different reading sources can be searched, tagged, annotated, and reviewed.
Daily ReviewA Readwise workflow that resurfaces selected highlights so users can revisit important ideas.
ReaderReadwise's read-it-later app for saving, reading, highlighting, and annotating articles and documents.
ExportA sync workflow that sends highlights and notes into external tools for writing, research, or personal knowledge management.

Common workflows

Import highlights from ebook or article sources into a single Readwise account.
Review selected highlights through the daily email or app experience.
Save new articles or documents into Reader, highlight them, and sync those highlights back to Readwise.
Export highlights to note-taking systems so useful passages can appear in writing, research, or study workflows.

Common misconceptions

Readwise is not only a read-it-later app; Reader handles reading, while Readwise focuses on highlights, review, organization, and export.
Highlight review does not automatically create understanding; users still need context, reflection, and judgment.
Exporting notes to another app does not guarantee a useful knowledge system unless the user maintains a workflow.
The WHOIS record describes domain registration metadata, not the full ownership or operating structure of the product.

Open questions

How much reading memory can software improve when attention and review habits vary widely?
Will highlight systems become more useful as AI tools summarize, cluster, and connect saved passages?
How should reading apps balance convenience with privacy for personal libraries and annotations?
Can export-heavy workflows stay simple enough for ordinary readers rather than only note-taking power users?