Amazon Kindle

Amazon Kindle is a series of e-readers designed and marketed by Amazon. Amazon Kindle devices enable users to browse, buy, download, and read e-books, newspapers, magazines, Audible audiobooks, and other digital media via wireless networking to the Kindle Store. The hardware platform, which Amazon subsidiary Lab126 developed, began as a single device in 2007. Currently, it comprises a range of devices, including e-readers with E Ink electronic paper displays and Kindle applications on all major computing platforms. All Kindle devices integrate with Windows and macOS file systems and Kindle Store content and, as of March 2018, the store had over six million e-books available in the United States.

In 2004, Amazon founder and CEO Jeff Bezos instructed the company's employees to build the world's best electronic reader before Amazon's competitors could. Amazon originally used the codename Fiona for the device.

Branding consultants Michael Cronan and Karin Hibma devised the Kindle name. Lab126 asked them to name the product, and they suggested "kindle", meaning to light a fire. They felt this was an apt metaphor for reading and intellectual excitement.

Kindle hardware evolved from the original Kindle introduced in 2007 and the Kindle DX (with its larger 9.7" screen) introduced in 2009. The DX remained the only non-6" E Ink Kindle device until the 2017 introduction of the Oasis 2. The range included early generation devices with a keyboard (Kindle Keyboard), devices with touch-sensitive, lighted, high-resolution screens (Kindle Paperwhite), early generations of a tablet computer with the Kindle app (Kindle Fire), and low-priced devices with a touch-sensitive screen (Kindle 7). However, the Kindle e-reader has often been a narrow-purpose device for reading rather than being multipurpose hardware that might create distractions while reading. Active Content support was introduced in 2010 only to be dropped from new Kindle devices in late 2014. After the first three generations, the Kindle Fire tablet branding was changed to Amazon Fire in 2014; this name change reflected their wider capabilities as an Android-derived tablet. Other later developments include devices with larger E Ink displays such as the Kindle Oasis 2 (2017) at 7" and the Paperwhite 5 (2021) at 6.8", as well as a device with a 10.2" screen and Wacom stylus support called the Kindle Scribe (2022). In 2022 Amazon also introduced the 11th gen Kindle with a 300 PPI display, ending the use of the 6" 167 PPI display that had been on every basic Kindle since 2007. In 2024 Amazon introduced the first color E Ink Kindle, the Kindle Colorsoft Signature Edition. In 2025 Amazon updated the Scribe lineup with a new design and introduced a Scribe Colorsoft model.

Amazon has also introduced Kindle apps for use on various devices and platforms, including Windows, macOS, Android, iOS, BlackBerry 10 and Windows Phone. Amazon also has a cloud reader to allow users to read e-books using modern web browsers.

Kindle devices support dictionary and Wikipedia look-up functions when highlighting a word in an e-book. The font type, size and margins can be customized. Kindles are charged by connecting to a computer's USB port or to an AC adapter. Users needing accessibility due to impaired vision can use an audio adapter to listen to any e-book read aloud on supported Kindles, or those with difficulty in reading text may use the Amazon Ember Bold font for darker text and other fonts may too have bold font versions.

The Kindle also contains experimental features such as a web browser that uses NetFront based on WebKit. The browser can freely access the Kindle Store and Wikipedia on 3G models while the browser may be limited to 50 MB of data per month to websites other than Amazon and Wikipedia. Other possible experimental features, depending on the model are a Text-to-Speech engine that can read the text from e-books and an MP3 player that can be used to play music while reading.

The Kindle's operating system updates are designed to be received wirelessly and installed automatically during a period in sleep mode in which Wi-Fi is turned on. A user may install firmware updates manually by downloading the firmware for their device and copying the file to the device's root directory. The Kindle operating system uses the Linux kernel with a Java app for reading e-books.