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Reverse Engineering the Notability File Format

Linked by Paul Ciano on June 7, 2018

Julia Evans:

…on Thursday, I bought an iPad + Apple Pencil, because the Apple Pencil is a very nice tool for drawing. I started using the Notability app for iPad, which seems pretty nice. But I had a problem: I have dozens of drawings already in the Android app I was using: Squid!

Notability does have a way to import PDFs, but they become read-only – you can draw on top of them, but you can’t edit them. That’s annoying!

The plan was to figure out how to convert SVGs to Notability’s native format (.note). This is a proprietary format, and nobody else seemed to have reverse engineered it yet, so I started from scratch.

A brilliant mind.

Paul Ciano

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