Live: loosenotes.thitichotk.com (runs in your browser, nothing is uploaded)

Loose-Notes pulls the audio recordings, PDFs and images out of .goodnotes files. Drop in one notebook or several and you get back what's inside, grouped by notebook, ready to download one by one or as a zip.

Using it

1. In GoodNotes, open the notebook, tap Share, then Export as GoodNotes.
2. Drop the .goodnotes file onto the page, or click to choose it. You can add several at once.
3. Click a file's name to preview it (images and recordings open in place; PDFs open in a new tab), use the download button on the row, or press Download all for one zip.

Run it locally

A static site with no build step; any web server works (ES modules don't load from file://).

git clone https://github.com/thitichotk/loose-notes.git
cd loose-notes
python3 -m http.server 8000      # then open http://localhost:8000
node check.mjs                   # checks the file-signature table

Cloudflare Pages deploys main as it is, and each pull request gets a preview link.

How it works

In the notebook	Saved as	How it's recognised
Recordings	Audio 01.m4a	ftyp box at byte 4 (GoodNotes records M4A)
Imported PDFs	PDF 01.pdf	%PDF
Photos and pasted images	Image 01.jpg / .png / .heic / .gif / .webp	file signature

GoodNotes stores attachments without names or extensions, so Loose-Notes reads each file's first bytes to work out what it is. Files are numbered per type, oldest first by the date stored with each attachment. Attachments under 10 KB are skipped, because those are GoodNotes' own page templates and icons. Downloads keep the notebook's name in front (Biology Lecture 4 - Audio 01.m4a), Thai names included.

Path	Role
index.html	The page, plus the inlined icon set
script.js	Reading notebooks with JSZip, rendering, preview, downloads and zips
detect.js	File-signature table (kindOf)
styles.css	The Loose-Notes design system: graphite on paper, ruled-paper drop zone, green highlighter
check.mjs	One node check for detect.js

Built with plain HTML, CSS and ES modules. JSZip 3.10.1 loads from cdnjs with subresource integrity.

Limits

• The whole notebook is read into memory, so very large notebooks (several hundred MB) can be too much for a phone browser. A computer handles them better.
• HEIC photos download fine but only preview in Safari.

Credits and licence

Loose-Notes is a fork of alinuxpengui/goodnotes-extractor, redesigned and largely rewritten by Thitichot K. Zip handling by JSZip, icons from Lucide (ISC).

Licensed under the GNU General Public License v3.0, like the original.

• Copyright (C) 2025 alinuxpengui (original goodnotes-extractor)
• Copyright (C) 2025–2026 Thitichot K. (modified: new interface, M4A/HEIC detection, per-notebook grouping, zip downloads, drag and drop)

Not affiliated with GoodNotes or Time Base Technology Limited.