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Runestone Text Editor

by Simon B. Støvring

Edit plain text and code with syntax highlighting, search and replace, and code formatting.

iOSPricing not verified
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What it does

Edit plain text and code with syntax highlighting, search and replace, and code formatting. Premium adds display and editor customization options.

Pricing: is Runestone Text Editor free?

US App Store download: Free (USD), checked 2026-09-23. The full pricing model, in-app purchases and subscription requirements have not been verified.

Screenshots

Developer-provided iOS screenshots.

HTML source editing with a coding keyboard on iPhone.
HTML source editing with a coding keyboard on iPhone.
Dark-theme editor with file and encoding actions.
Dark-theme editor with file and encoding actions.
Markdown source with syntax highlighting and document navigation.
Markdown source with syntax highlighting and document navigation.
JavaScript search results displayed inside the editor.
JavaScript search results displayed inside the editor.

Features

Language-aware highlighting

Syntax highlighting of many languages including HTML, JavaScript, JSON, Markdown, Swift, Python, PHP, YAML, and many more.

Developer’s App Store feature description (iOS)

Editor themes

Select one of the twelve standard themes including popular themes like Tomorrow, Dracula, Solarized, and One Dark Pro.

Developer’s App Store feature description (iOS)

Find and replace

Innovative find and replace for searching and modifying text while still viewing your file.

Developer’s App Store feature description (iOS)

Custom fonts

Choose font and font size, including support for custom fonts imported using another third-party app.

Developer’s App Store feature description (iOS)

Cursor position

Show the line and column the cursor is located on.

Developer’s App Store feature description (iOS)

Sources & verification

Last verified: 23 September 2026. Features not listed here may be unverified.

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