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Instapaper
Obsidian
Matter
My Mind
Hardcover
Notion
Effortlessly rediscover and organize your Kindle highlights
JSON Formatter & Validator
JSONFormatter.org
betterjson.com
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JSONLint
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JSONGuide Json formatter
Format, validate, and beautify JSON data instantly. Free online JSON formatter with syntax highlighting, error detection, and minification features.

Which is more popular?
Based on our record, Readwise seems to be more popular. It has been mentioned 88 times since March 2021.
Website, pricing, platforms and company facts side by side.
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JSON 44
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| Website | readwise.io | json-44.vercel.app |
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Why this product is good
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Walkthroughs and reviews on video.
Readwise: How to use Spaced Repetition with your books
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Readwise and JSON 44. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

I imported my kindle highlights, as many others. Now I daily review some highlights (thanks to a dashboard, I am motivated). And where I didn't create highlights, as I only listened to the audiobooks, I get the...
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Recommendations tracked on public social media and blogs since March 2021.

Anyway, as I reached the end of the chapter, I wanted to read my Readwise's daily recap. However, my iPhone was in other room. I didn’t want to get up; I was tired. - Source: dev.to / 4 months ago
The only highlights that Readwise retrieves semi-automatically are from the books I buy from Kindle, by going into the Readwise app and clicking a button. If I upload them to Kindle or need highlights from the Apple Books app, I have to... - Source: dev.to / over 1 year ago
Readwise also has this feature. I get a daily email with a random assortment of highlights that have been pulled in from multiple sources (Reader, Notion, Kindle, etc.) The product benefit in their case is that it's kind of like Zapier,... - Source: Hacker News / almost 2 years ago
Tracking JSON 44 since Oct 2025.
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A second brain, for you, forever. Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files.
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A free, online JSON validator and JSON formatter (or beautifier) that enables users to filter their JSON using JSONPath and share their JSON via generated share links.
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