A focused code editor in your pocket

Edit developer files without waiting for your computer.

Open source files from iCloud Drive or On My iPhone, make a quick change, and save it back from your iPhone or iPad. Developer File Editor keeps the workflow lightweight with line numbers, auto-indentation, smart editing assistance and Swift-aware diagnostics.

Download on the App Store Explore features

Swift & PythonSwift diagnosticsFiles app workflowSave changes directly

Example.swift•••

1 import SwiftUI
2
3 struct ContentView: View {
4   var body: some View {
5     Text("Edit anywhere")
6       .font(.headline)
7   }
8 }

⚠ Swift diagnostics ready

Text • font • foregroundStyle

For the small edits that should not require a laptop.Inspect a file, fix a value, review code, or make a quick source change while you are away from your desk.

Built for mobile editing

The tools you need without IDE clutter.

Open files

Choose developer files from iCloud Drive or On My iPhone through the Files workflow.

Edit cleanly

Use line numbers, auto-indentation and a focused editing interface.

Get suggestions

Smart symbols and inline suggestions reduce repetitive typing on a phone keyboard.

Save your work

Overwrite the existing file or save a new copy when you want to preserve the original.

Swift diagnostics & code quality

Catch problems while you edit.

Swift-aware diagnostics put useful feedback directly where you are working, making code review and cleanup easier on iPhone and iPad.

Inline diagnostics

Syntax problems, warnings and reminders appear directly in the editor gutter, with colored caution markers for quick scanning.

⌘

SwiftSyntax parsing

SwiftSyntax-powered parsing provides more accurate Swift syntax detection as you work.

Smarter typo detection

Check Swift keywords, common APIs and local symbols to catch likely typing mistakes.

✓

Code-quality checks

Flag force unwraps, force casts, duplicate imports, empty blocks, stray apostrophes, long lines, tabs and trailing whitespace.

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Better Issues panel

Review diagnostics in one place and jump directly to the relevant line when something needs attention.

!Syntax problem12

!Force unwrap18

!Trailing whitespace24

Issues stay visible and actionable instead of getting lost in a separate workflow.

Mobile developer workflow

Useful when “I’ll fix it later” is too slow.

Developer File Editor is designed for quick inspection and changes while traveling, testing on-device, learning, or working away from your main computer.

Review source code from Files
Update configuration or text files
Write or tweak Swift and Python
Spot Swift issues as you edit
Keep recent files close at hand
Save without moving through a desktop workflow

ContentView.swiftSwift

main.pyPython

config.jsonJSON

README.mdText

Open developer files directly from your device storage and cloud locations.

Mobile coding guides

Edit source files on iPhone and iPad.

Mobile coding

Code when the computer is not nearby

Keep a capable file editor on your iPhone.

Open, modify and save source files with a workflow designed for a small screen.

Get Developer File Editor