KTool sends web articles, newsletters and RSS feeds to your Kindle as clean e-books. Plans from $2.99/mo billed annually, with a 7-day free trial.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
KTool is a service that sends web articles, newsletters, RSS feeds and documents to a Kindle so they can be read on an e-ink screen instead of a computer or phone. It is built by Daniel Nguyen and published by Podzim LLC, and the site says it has more than 10,000 users across the Chrome Web Store, Firefox Add-ons and the App Store.
The product grew out of a personal problem. Nguyen says he is nearly blind in one eye and became conscious of screen time after reading an Ask HN thread about a software engineer going blind. He began moving reading material to a Kindle, ran into limits with existing tools, and built KTool to send almost any online content there.
A user installs a browser extension or mobile app, opens an article, and sends it to a Kindle in one click. KTool converts the page into an e-book by removing ads and distractions, detecting the table of contents automatically, preserving formatting and styles, and optimizing images for Kindle devices. Emoji are supported, and the delivered file can be read offline.
The output works with Kindle's native features, including notes and highlights, bookmarks, themes, fonts and layout, dictionary and Wikipedia lookup, and sync with Kindle mobile apps. The site notes that KTool now uses the modern EPUB format. On the Premium plan, links inside articles can be converted on demand, so related pages become readable articles rather than slow Kindle browser pages.
KTool supports a wide range of sources: Wikipedia articles, X articles, StackOverflow answers, Hacker News discussions, RSS feeds, Reddit discussions, Markdown, DOCX and PDF files, and Standard Ebooks. Subscriber-only articles can be sent when the user can open them in their browser. Newsletter support is labeled beta on the site, and documents up to 20 MB are accepted on every paid plan.
Higher tiers add organizing and reading tools. Premium includes custom digests and magazines that bundle articles into periodicals, an ADHD Reader Mode, and support for more than 100 newsletter formats. Platinum adds downloadable EPUBs, full-text search across articles and newsletters, and unlimited data retention. All plans include a QR code tool for videos and rich media and an Image Zoom tool.
KTool is a subscription service that sends web articles, newsletters, RSS feeds and documents to a Kindle as formatted e-books. It uses browser extensions and mobile apps to send content in one click.
Basic is $4.99 per month ($2.99 per month billed annually at $36). Premium is $6.99 per month ($3.99 billed annually at $48), and Platinum is $10 per month ($6 billed annually at $72). Prices are in USD and VAT may apply.
Yes. Each plan starts with a 7-day free trial, and the site says no credit card is required to start.
The site lists web articles, Wikipedia, X articles, StackOverflow answers, Hacker News and Reddit discussions, RSS feeds, newsletters (beta), Markdown, DOCX, EPUB and PDF (beta) files, and Standard Ebooks.
KTool offers extensions for Safari, Chrome, Firefox and Brave, plus iOS and Android apps. Installation links are on the ktool.io install page.
Subscriptions can be canceled, paused, upgraded or downgraded at any time from the account. All payments, including renewals, are refundable within 14 days by emailing the founder.
Basic stores articles, newsletters and send history for 30 days and Premium for 90 days. Platinum stores them for as long as the account exists.
KTool suits Kindle owners who read many online articles, threads and newsletters and want to read them away from computer screens. Testimonials come mostly from founders, executives and engineers.