Send newsletters & articles to Kindle

Send news articles, Twitter threads and newsletters to Kindle
Turn your email newsletters into beautiful Kindle e-books
Reduce screen time. Improve productivity.

Pro content creators are using KTool everyday

Tony Dinh 🎯Simon HøibergJim Raptis 🇺🇦Dominik SobeDagobert Renouf
from 10K+ happy users
No credit card required


You spend too much time on computer screens.
It damages your eyesight and hurts your comprehension.
KTool helps you read everything on Kindle instead.
Less eyestrain. More focus 🧘
Read my story ↓

4.7 Based on user review
10K+ happy users from Chrome Web Store, Firefox Add-ons, and App Store

Send online content to your Kindle
in one click

Easy to use

So simple that even your ma can use it.
It just works™

  • Send articles to your Kindle in one click
  • Article delivered within a minute
  • Cross-platform: available on mobile, desktop, and web.
  • KTool supports Wikipedia articles, Twitter threads, StackOverflow answers, Markdown, PDF, DOCX, Standard EBooks, newsletters and many more...

The most straightforward way to send online articles to your Kindle!

Jim Raptis
Founder of BrandBird
Jim Raptis - Founder of BrandBird

Best conversion quality

I believe that simplicity should not come at the expense of quality. KTool turns web articles into high quality e-books.

  • Removes all ads and distractions
  • Detects Table of Content automatically
  • Preserves formats & styles
  • Optimizes images for Kindle devices
  • Supports emoji 🔥🔥🔥

I love the quality of KTool article conversion, much better that what I had built, which was better than other solutions!

Divyendu Singh
Staff Engineer at Yara
Divyendu Singh - Staff Engineer at Yara

Works with

The Wall Street Journal
The New York Times

Kindle native

KTool supports all Kindle's native features

  • Notes & Hightlights
  • Bookmarks
  • Themes, Font & Layout
  • Dictionary & Wikipedia
  • Sync with Kindle mobile apps
  • New: now with modern EPUB format

[...] It's the best 'To Kindle' conversion I have come across so far.

David Salter
Financial Services Solutions Architect
David Salter - Financial Services Solutions Architect

Smart & powerful

KTool integrates deeply with popular web services to bring you the best reading experience.

  • Popular news sources, including content behind paywalls
  • Wikipedia articles
  • Twitter threads
  • StackOverflow answers
  • Hacker News discussions
  • Markdown, DOCX, PDF
  • Standard EBooks (
  • Newsletters (beta)
  • Coming soon: RSS, Reddit...

KTool is the easiest way to queue up articles and Twitter threads that I'm too busy to read during the day, to read on my Kindle before I go to sleep

Simon Høiberg
CEO at FeedHive
Simon Høiberg - CEO at FeedHive

Don't take our word for it

We are loved by startup founders, CEOs, freelancers, software engineers and many more. Our customers' testimonials are the best social proof we can get!

Just thought of using my Kindle again before going to sleep today and tried KTool of @daniel_nguyenx, it’s awesome and makes a lot sense now! 🤩 Now I want to send many things to my Kindle to read before going to sleep, without being hooked to the platforms 🪄👌
I have a constant list of things I should read, while also a Kindle with nothing in it. @daniel_nguyenx built a easy way to ping things to it in a second. It's flipping great.
1 year ago I gave away my Kindle because by @daniel_nguyenx didn't exist. Today I'm looking into buying a new one.
I finally got a kindle and it’s pretty cool. But the best part, by far, is to be able to read my newsletter and some of my other favorite newsletters on it. @ktool_io pulls everything in surprisingly cleanly too, just text and images none of the web junk.
Innovative tool of the week #2 @ktool_io, a tool that let you send web articles, blog posts, Twitter threads and newsletters to Kindle in a good looking way 👌🏽
Just purchased a lifetime license for @ktool_io to send longform articles to my Kindle app on my Boyue Likebook eReader. It's the best 'To Kindle' conversion I have come across so far. Looking forward to seeing this app progress.
finally had the time to give @ktool_io a try .. @daniel_nguyenx is creating a stellar product there! if you have a Kindle this is a no-brainer - read any website (e.g. blog posts) on your Kindle! I'd highly recommend to grab yourself a lifetime deal as long as it's available 🔥
@daniel_nguyenx @ktool_io Looks awesome. I had two long blog posts in tabs today that I closed because I just wasn’t going to read them on my computer. Sending them to my Kindle would have been awesome
shoutout to @daniel_nguyenx and his product @ktool_io . I've been trying to read more on my kindle (off social media) and his tool makes it super easy to send articles and links directly to my kindle (reader formatted too!) It's really amazing how easy it is.
Finally got around to signing up for @ktool_io guess who’s sending long form web articles to his kindle from now on? This guy.
Just used the free tier of @ktool_io to send a "long read" article to my Kindle and the entire process was streamlined and beautiful. Absolutely love it. Great work @daniel_nguyenx!
@daniel_nguyenx @ktool_io now that's a cool project idea. kindle always feels very relaxing to read.

Who am I?

I'm Daniel Nguyen. In June, I quit my consulting job to start indie hacking on the side.

The idea of KTool first came to my mind when I was reading Ask HN: I'm a software engineer going blind, how should I prepare?

I've been wearing glasses since I was 5. My right eye is basically blind. Doctors said there is no chance to cure it.

I was genuinely scared. Like holy sh*t, if my left eye stops working, my life is done. Since then I've been very conscious about time spent on computer screens.

That's when I started using Kindle-related products: to offload as many reading materials as possible to the Kindle.

Then I ran into multiple limitations which led me to build KTool: a tool to send anything online to Kindle. Blog posts, Twitter threads, Hacker News discussions, RSS, newsletters, your favorite manga... you name it.

If you're a Kindle owner and read a lot of online content, give KTool a try.

Also, check out my latest AI productivity tool Bolt AI

If you're on Twitter, let's connect. I'm actively #buildinpublic there.

👋 Daniel

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