Step-by-step guides for every dark tool.
Short, practical walkthroughs: how to read a PDF in dark mode, open an EPUB or Word file, check a spreadsheet, darken a screenshot and pick colours that stay readable. Everything runs in your browser and your files stay on your device.
How to Read a PDF in Dark Mode
Turn a glaring white PDF into a calm dark page, with search, zoom and highlights, without installing anything or uploading the file.
6 steps · 3 minRead guideHow to Read an EPUB Book in the Dark
Open a DRM-free EPUB in a dark reader that remembers your place, searches the whole book and lets you set the type exactly as you like it.
6 steps · 3 minRead guideHow to Open a Word Document in Dark Mode
Review a long Word brief or report on a dark page, search it and keep the original file untouched, with no Word installed.
4 steps · 2 minRead guideHow to View CSV and Excel Files on a Dark Grid
Check an export or a shared spreadsheet on a calm dark table, with filtering and sorting, without opening a full spreadsheet program.
4 steps · 2 minRead guideHow to Make a Dark Screenshot Before You Share It
Take a bright screenshot and turn it into a calmer picture that fits a dark chat or a dark note, with a frame, a caption and a few marks.
6 steps · 4 minRead guideHow to Make an Image Sit Well on a Dark Page
A white chart or a bright sky can glare on a dark page. Check how bright an image really is and soften it with a few sliders.
4 steps · 3 minRead guideHow to Check Text and Background Contrast for a Dark Theme
Test any text and background colours against WCAG, preview them on a dark page and copy the pair that works.
5 steps · 3 minRead guideHow to Keep Notes on a Dark Page
Write, search and export notes on a calm dark page that saves as you type, with nothing to sign up for.
4 steps · 2 minRead guideWant the why, not only the how?
Our blog explains the thinking behind these tools: when dark mode helps, how to read at night and how long to focus.