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Digitize Your Handwritten Notes with Readwise

Knowledge Work Nexus·
5 min read

Based on Knowledge Work Nexus's video on YouTube. If you like this content, support the original creators by watching, liking and subscribing to their content.

TL;DR

Readwise can scan a photo of handwritten notes, extract selected text, and save it as a highlight tied to a specific page number.

Briefing

A practical workflow for turning handwritten notes into searchable, page-indexed digital knowledge is emerging through Readwise—especially for people who want their paper notes to live alongside their reading highlights. The core idea is that Readwise can scan a photo of a page, let users select the relevant text, and then attach that extracted passage to a specific page number inside a “book” in Readwise. That page-level indexing matters because it makes later retrieval far faster than searching for a vague transcription or a generic OCR dump.

The transcript walks through the process using the Readwise mobile app. Users open the white Readwise app (distinct from the black Reader app), tap “add highlights,” and choose “via photo.” After taking a picture of a page, they use on-screen blue bars to select the text they want saved, then confirm and review the scan. Readwise supports lightweight markup during review—italics, bold, and highlighting—so the extracted notes can retain some structure. The next step assigns metadata: a page number, the target “book,” and optional notes. If the book doesn’t exist yet, users can create a custom one (for example, a “bullet journal”), optionally adding an author field as an extra search term. Once saved, the selected passage appears as a highlight tied to that page number.

From there, Readwise becomes a bridge to a knowledge base in Obsidian. The transcript emphasizes a key limitation that shaped a client’s decision: scanning and highlighting must be done from the Readwise mobile app. For a large batch—around 2,000 index cards—that phone-based workflow was a dealbreaker for that particular person, even though the indexing concept was compelling.

Still, the workflow is shown as usable in smaller batches. Readwise stores the highlights so they can be viewed on mobile and desktop, and it can generate shareable quote images for social media. On the Obsidian side, the Readwise community plugin is the mechanism that syncs highlights into a vault. After installing the plugin and configuring Readwise sync settings (left largely at defaults), users can choose to import all book highlights or only a specific custom book. If notes don’t appear, a manual re-sync can be triggered from the plugin settings.

Once inside Obsidian, the highlights can be linked and transcluded into daily notes and other documents, turning scanned handwritten artifacts into reusable building blocks.

The transcript also compares alternatives considered for the index-card project: Apple Photos OCR for text search, Apple Shortcuts to extract text from photos and paste into Obsidian, and “Actions for Obsidian” (by Carlos Sottman) to send extracted text directly into Obsidian notes. Those options were weighed against the client’s requirements—batching related cards, avoiding manual text selection, and preserving photos as artifacts. Ultimately, Readwise was treated as an interesting indexing solution rather than the final choice for the full 2,000-card conversion, but it remains a strong fit for anyone who wants paper notes to become page-indexed, searchable knowledge alongside reading highlights.

Cornell Notes

Readwise can digitize handwritten pages by scanning a photo, letting users select the text, and saving it as a highlight tied to a specific page number inside a custom “book.” That page-level indexing makes later retrieval in a knowledge system much more reliable than searching raw OCR. The transcript then connects Readwise to Obsidian using the Readwise community plugin, which syncs highlights into an Obsidian vault so they can be linked and transcluded into other notes. A major constraint is that scanning/highlighting must happen in the Readwise mobile app, which made a large 2,000-card batch impractical for one client. For smaller workflows, the combination of Readwise indexing and Obsidian integration offers a workable path from paper artifacts to reusable digital notes.

How does Readwise turn a photo of handwritten notes into something searchable and structured?

In the Readwise mobile app, users tap “add highlights” and choose “via photo,” then take a picture of the page. They use the blue selection bars to mark the text they want saved, confirm, and review the extracted passage. Readwise allows simple markup during review (italics with one asterisk, bold with two asterisks, and highlights with two underscores). The workflow then requires assigning a page number and selecting (or creating) the target “book,” so the saved highlight is indexed to a specific page.

Why does page-number indexing matter for handwritten notes in a knowledge system?

Page-number indexing turns a scan into a navigable reference. Instead of searching for a transcription blob, users can retrieve notes by the page they came from. The transcript’s example uses a custom “bullet journal” book and assigns page 26, so the highlight is anchored to that location—making later recall and cross-referencing faster when the notes are reused inside Obsidian.

What limitation can make Readwise a poor fit for very large handwritten collections?

The transcript notes that scanning and highlighting can only be done from the Readwise mobile app. For a client facing roughly 2,000 handwritten index cards, the phone-based, per-card/per-page selection workflow was not desirable, so Readwise was excluded for that specific large-scale conversion even though the indexing concept was appealing.

How do Readwise highlights get into Obsidian?

Obsidian integration relies on the Readwise community plugin. After installing the plugin and configuring Readwise sync settings (kept mostly at defaults), users can import highlights—either all book highlights or only a selected book. If highlights don’t show up, the plugin provides an option to initiate a manual re-sync. Once synced, highlights can be linked and transcluded into daily notes and other Obsidian notes.

What alternative workflows were considered for digitizing index cards into Obsidian?

Several options were weighed: (1) Apple Photos OCR, which supports text search and works well for handwriting when photos are taken; (2) Apple Shortcuts to extract text from a photo and copy it to the clipboard, then paste into Obsidian (including running the shortcut on an iPhone and pasting on a Mac); and (3) “Actions for Obsidian” by Carlos Sottman, which can send extracted text straight into an Obsidian note. These were considered in light of requirements like batching related cards, avoiding manual text selection, and retaining photos as artifacts.

Review Questions

  1. What steps in the Readwise mobile app are required to save a handwritten page as an indexed highlight (including page number and book assignment)?
  2. How does the Readwise community plugin change what’s possible once highlights are in an Obsidian vault?
  3. Why might a workflow that relies on mobile scanning and text selection become impractical for thousands of index cards?

Key Points

  1. 1

    Readwise can scan a photo of handwritten notes, extract selected text, and save it as a highlight tied to a specific page number.

  2. 2

    Users can create custom “books” inside Readwise (e.g., a bullet journal) so handwritten notes are organized like reading highlights.

  3. 3

    Readwise supports lightweight formatting during review (italics, bold, and highlights) to preserve some structure in the extracted text.

  4. 4

    Obsidian integration depends on the Readwise community plugin and Readwise sync settings, with an option for manual re-sync if notes don’t appear.

  5. 5

    Readwise scanning/highlighting must be done from the Readwise mobile app, which can limit scalability for very large batches.

  6. 6

    Apple Photos OCR and Apple Shortcuts offer alternative paths to extract text from photos and paste into Obsidian, while Actions for Obsidian can automate sending text directly into notes.

Highlights

Readwise turns a photographed page into a page-indexed highlight by requiring both text selection and a page number assignment inside a chosen (or newly created) book.
The Obsidian workflow hinges on the Readwise community plugin: once synced, highlights can be linked and transcluded into daily notes.
A key bottleneck is that scanning/highlighting happens only in the Readwise mobile app, making large batch digitization (like 2,000 cards) harder to manage.
Alternatives like Apple Photos OCR and Apple Shortcuts were evaluated to reduce manual selection and better match specific artifact requirements.

Topics

Mentioned

  • Carara
  • Carlos Sottman