Runestone

A performant, lightweight, and simple plain text editor with syntax highlighting, line numbers, search and replace, page guide, and much more.

Runestone is made by a single person with a love for text editors and a vision of building the most lightweight text editor for iPhone and iPad that still has the core features for editing code.

Features:

• Syntax highlighting of many languages including HTML, JavaScript, JSON, Markdown, Swift, Python, PHP, YAML, and many more.
• Select one of the twelve standard themes including popular themes like Tomorrow, Dracula, Solarized, and One Dark Pro.
• Innovative find and replace for searching and modifying text while still viewing your file.
• Choose font and font size, including support for custom fonts imported using another third-party app.
• Show the line and column the cursor is located on.
• Uses the standard document browser for an experience similar to the Files app.
• Quickly navigate to a specific line.
• Automatically close opening brackets and quotes.
• Multiple windows on the iPad.
• Format code using Prettier.js. Supported languages include CSS,HTML, JavaScript, JSON, PHP and more.
• Choose text encoding between popular encodings like UTF-8, UTF-16, ISO Latin 1, and many more.
• Enable or disable autocorrection, autocapitalization, and smart punctuation.
• Set default file extension of new files.
• Open files in Runestone from the Share Sheet.
• Print documents.

Premium features:

• Choose between eight app icons.
• Show line numbers.
• Highlight the selected line.
• Increase line height and letter spacing.
• Disable line wrapping to allow horizontal scrolling.
• Show tabs, spaces, and line breaks using a selected symbol.
• Enable page guide at a specific column to easily tell when lines are getting too long.
• Add vertical and horizontal overscroll.
• Remember the selected language per file.
• Save file extensions and filenames that should always be treated as plain text files.
• Enable soft tabs and choose the width of the tab character.
• Specify whether pressing the tab key should insert a tab or indent the line.
• Adjust the scaling of Markdown headings and disable highlighting of code blocks in Markdown.

Premium features are unlocked with a one-time in-app purchase that’s currently priced at $9.99 USD. Pricing may vary from country to country.

Runestone was built on the open-source framework with the same name. Find more information on the Runestone framework at github.com/simonbs/runestone