Developer tools
Format, inspect and debug the data you work with.
JSON Formatter & ValidatorRegex TesterUnix Timestamp ConverterYour everyday developer toolkitFree Online Developer
Free Online Developer
& Utility Tools
Fast, private and easy-to-use tools for developers, programmers and everyday tasks.
JSON, with a little breathing room.{ }
{
"name": "Flutters",
"tools": 15,
"cost": "free",
"processing": "in your browser"
}Valid JSON · Ready to build something.
✓ Free to use✓ No account required✓ Local browser processing✓ No installation
Popular tools
View all 15 tools →Developer Tools
JSON Formatter & Validator
Format and validate JSON with readable indentation.
Open tool Encoding & ConversionBase64 Encoder & Decoder
Encode and decode UTF-8 text without losing Unicode.
Open tool Developer ToolsUnix Timestamp Converter
Convert Unix seconds, milliseconds and local dates.
Open tool Security & GeneratorsUUID Generator
Generate random version 4 UUIDs using browser cryptography.
Open tool Developer ToolsRegex Tester
Test JavaScript regular expressions and inspect matches.
Open tool Security & GeneratorsPassword Generator
Create random passwords with configurable character sets.
Open tool Flutter & Dart ToolsFlutter Color Converter
Convert HEX and RGB to Flutter ARGB color literals.
Open tool Flutter & Dart ToolsJSON to Dart Converter
Generate null-safe Dart models from a JSON object.
Open toolFind your toolkit
Flutter & Dart
A few useful shortcuts for your next Flutter project.
Flutter Color ConverterJSON to Dart ConverterDart / Flutter Package Name GeneratorEveryday utilities
Simple helpers for writing, sharing and creating.
Word & Character CounterQR Code GeneratorPassword GeneratorWhy Flutters?Less setup.
Less setup.
More getting things done.
Keep your input local
Tool calculations run directly in your browser.
Open and use
No accounts, subscriptions or installation.
Built to stay lightweight
Focused pages without a heavy app shell.
Works on your phone
Useful controls and readable output on smaller screens.
Recently added
Explore Flutter & Dart →Encoding & Conversion
Color Converter
Convert HEX, RGB and HSL colors with a live preview.
Open tool Flutter & Dart ToolsFlutter Color Converter
Convert HEX and RGB to Flutter ARGB color literals.
Open tool Flutter & Dart ToolsJSON to Dart Converter
Generate null-safe Dart models from a JSON object.
Open tool Flutter & Dart ToolsDart / Flutter Package Name Generator
Turn project names into valid Dart package names.
Open toolUseful guides
Practical notes on JSON, Unix time and Flutter color values are planned. Each tool already includes examples, limitations and instructions.
Visit the guide library →A small toolkit for the work between the work
Inspect an API response, turn a timestamp into a readable date, or convert a design color into a Flutter literal. Flutters brings these everyday tasks together in focused browser tools, with examples that explain what the output means.
Start with the developer collection for JSON, encoding and debugging. The Flutter & Dart collection covers model generation, colors and package naming, while utility tools help with text and QR codes. All initial tools process input locally; optional advertising and analytics are described in our privacy policy.