What is DevSwiftTools?
DevSwiftTools is a comprehensive suite of developer productivity tools designed to streamline your workflow. Every tool runs entirely in your browser with zero server-side processing, ensuring complete privacy and lightning-fast performance.
Privacy First
All processing happens locally in your browser. Your data never leaves your device, and we never see, store, or transmit your information.
Blazing Fast
Client-side processing means instant results with zero network latency. No waiting for server responses or upload times.
Developer First
Built by developers, for developers. Clean interfaces, keyboard shortcuts, and powerful features designed for productivity.
100% Free
All tools are completely free with no limitations, no accounts, and no hidden costs. Forever.
How to Use This Documentation
This documentation is organized by tool category. Each tool section includes:
- Description: What the tool does and why you'd use it
- Features: Complete list of capabilities
- Use Cases: Real-world scenarios and applications
- Options: Configuration and customization settings
- Examples: Input/output examples with explanations
Formatters
Beautify and validate code with smart formatting options
JSON Formatter
A powerful JSON formatter that beautifies, validates, minifies, and sorts JSON data. Features real-time validation, customizable indentation, and smart formatting options. Perfect for developers working with APIs, configuration files, and data structures.
Open Tool →Features
- Format and beautify JSON with customizable indentation (2, 4 spaces, or tabs)
- Minify JSON to remove all unnecessary whitespace
- Real-time syntax validation with detailed error messages
- Sort object keys alphabetically (ascending/descending)
- Syntax highlighting for improved readability
- Auto-format on paste option
- Line numbers for easy navigation
- One-click copy to clipboard
Use Cases
Debugging API responses
Formatting configuration files
Validating JSON structure before deployment
Cleaning up minified JSON for readability
Sorting JSON keys for consistent formatting
Preparing JSON for documentation
Configuration Options
Auto Format
toggleAutomatically format JSON as you type
Smart Format
toggleIntelligently preserve certain formatting patterns
Indentation
selectNumber of spaces for indentation
Sort Keys
selectSort object keys alphabetically
Minify
toggleRemove all whitespace and line breaks
Examples
Basic Formatting
Convert compact JSON to readable format
{"name":"John","age":30,"city":"New York"}{
"name": "John",
"age": 30,
"city": "New York"
}Sort Keys
Alphabetically sort object keys
{"z": 1, "a": 2, "m": 3}{
"a": 2,
"m": 3,
"z": 1
}Important Notes
- All processing happens client-side in your browser
- Supports large JSON files (up to 10MB tested)
- Preserves data types (numbers, booleans, null)
XML Formatter
Professional XML formatter with validation, syntax highlighting, and customizable formatting options. Handles complex XML structures including namespaces, attributes, and CDATA sections.
Open Tool →Features
- Format and beautify XML documents
- Validate XML syntax
- Customizable indentation levels
- Syntax highlighting
- Preserve or normalize whitespace
- Handle XML namespaces correctly
- CDATA section support
Use Cases
Formatting API responses (SOAP, RSS, Atom)
Cleaning up configuration files
Preparing XML for documentation
Debugging XML structure issues
Configuration Options
Indentation
selectSpaces for each level
Preserve Whitespace
toggleKeep original whitespace in text nodes
Examples
Basic XML Formatting
<root><person><name>John</name><age>30</age></person></root><root>
<person>
<name>John</name>
<age>30</age>
</person>
</root>YAML Formatter
Comprehensive YAML formatter supporting YAML 1.2 specification. Format, validate, and beautify YAML configuration files with intelligent indentation and syntax validation.
Open Tool →Features
- Format YAML with consistent indentation
- Validate YAML syntax
- Syntax highlighting
- Support for complex YAML features (anchors, aliases, multiline strings)
- Configurable indentation (2 or 4 spaces)
Use Cases
Formatting Kubernetes manifests
Cleaning up Docker Compose files
Validating CI/CD configuration (GitHub Actions, GitLab CI)
Organizing Ansible playbooks
Configuration Options
Indentation
selectSpaces for each level
Examples
Kubernetes Manifest
apiVersion: v1
kind: Pod
metadata:
name: nginxapiVersion: v1
kind: Pod
metadata:
name: nginxSQL Formatter
Advanced SQL formatter supporting multiple SQL dialects (MySQL, PostgreSQL, SQL Server, Oracle). Format complex queries with proper indentation, keyword capitalization, and syntax highlighting.
Open Tool →Features
- Format SQL queries with proper indentation
- Support for multiple SQL dialects
- Keyword capitalization options
- Syntax highlighting
- Handle complex nested queries
- Format CTEs and window functions
Use Cases
Cleaning up minified SQL
Standardizing query formatting across teams
Debugging complex joins and subqueries
Preparing SQL for documentation
Configuration Options
Indentation
selectSpaces for indentation
Uppercase Keywords
toggleConvert SQL keywords to uppercase
HTML Formatter
Professional HTML formatter that beautifies HTML markup with configurable indentation, handles inline vs. block elements intelligently, and preserves important formatting.
Open Tool →Features
- Format HTML with proper nesting
- Intelligent inline vs. block element handling
- Preserve or normalize whitespace
- Syntax highlighting
- Self-closing tag support
Use Cases
Cleaning up minified HTML
Formatting email templates
Preparing HTML for code reviews
JSON5 Formatter
Format and validate JSON5, the more human-friendly JSON variant that supports comments, trailing commas, unquoted keys, and more.
Open Tool →Features
- Format JSON5 with all extended syntax features
- Preserve comments (single-line and multi-line)
- Support trailing commas
- Unquoted keys support
- Syntax highlighting
Use Cases
Formatting configuration files (tsconfig.json, .babelrc)
Working with package.json comments
Converters
Convert between different data formats seamlessly
JSON to SQL Converter
Transform JSON arrays and objects into SQL INSERT statements. Automatically detects schema, handles data types, and generates production-ready SQL code for any database.
Open Tool →Features
- Auto-detect table schema from JSON structure
- Generate CREATE TABLE statements
- Generate INSERT statements with proper escaping
- Support for nested objects (flattening options)
- Handle arrays and complex data types
- Multiple SQL dialect support
Use Cases
Importing JSON API data into databases
Migrating data from NoSQL to SQL databases
Generating test data for SQL databases
Creating SQL from configuration files
Examples
Simple JSON to SQL
[{"id": 1, "name": "John", "age": 30}]CREATE TABLE users (
id INT,
name VARCHAR(255),
age INT
);
INSERT INTO users (id, name, age) VALUES (1, 'John', 30);JSON to CSV Converter
Convert JSON data to CSV format with customizable delimiters, quote characters, and header options. Perfect for exporting data to Excel or other spreadsheet applications.
Open Tool →Features
- Convert JSON arrays to CSV
- Automatic header detection
- Custom delimiter support
- Handle nested objects
- Escape special characters
- Download as .csv file
Use Cases
Exporting API data to Excel
Creating reports from JSON logs
Data analysis and visualization
Base64 to Image Converter
Convert Base64-encoded strings to images. Supports all major image formats (PNG, JPG, GIF, SVG, WebP) with preview and download capabilities.
Open Tool →Features
- Decode Base64 to image
- Preview decoded image
- Download in original format
- Support for all image formats
- Automatic format detection
Use Cases
Extracting images from Base64 data URLs
Debugging embedded images in HTML/CSS
Converting data URIs to files
Markdown to HTML Converter
Professional Markdown to HTML converter supporting GitHub-flavored Markdown, tables, code blocks with syntax highlighting, and custom styling options.
Open Tool →Features
- GitHub-flavored Markdown support
- Syntax highlighting for code blocks
- Table support
- Task list support
- Emoji support
- Custom CSS styling options
Use Cases
Converting README files for websites
Generating HTML from documentation
Creating blog posts from Markdown
Unit Converter
Comprehensive unit converter supporting length, weight, temperature, area, volume, time, and more. Precise conversions with real-time results.
Open Tool →Features
- Multiple unit categories (length, weight, temperature, etc.)
- Real-time conversion
- High precision calculations
- Common and scientific units
Use Cases
Converting metric to imperial units
Temperature conversions
Scientific calculations
YAML to JSON Converter
Convert YAML format to JSON with proper formatting. Maintains data integrity and handles complex structures including anchors, aliases, and multiline strings.
Open Tool →Features
- Convert YAML to JSON
- Preserve data types
- Handle complex structures
- Syntax validation
- Pretty print JSON output
Use Cases
Converting config files to JSON
API format conversions
Documentation format changes
JSON to YAML Converter
Convert JSON format to YAML with proper formatting. Maintains data integrity and creates clean, readable YAML output.
Open Tool →Features
- Convert JSON to YAML
- Preserve data types
- Handle complex structures
- Syntax validation
- Clean YAML formatting
Use Cases
Converting config files to YAML
Creating Kubernetes configs
Docker Compose file generation
CSV to JSON Converter
Convert CSV data to JSON format with automatic header detection and type inference. Perfect for importing spreadsheet data into applications.
Open Tool →Features
- Convert CSV to JSON arrays
- Automatic header detection
- Type inference (numbers, booleans, null)
- Handle quoted fields
- Escape special characters
- Pretty print JSON output
Use Cases
Importing Excel data to applications
Converting spreadsheet exports
Data migration and transformation
Data & Security
Generate secure data, hashes, and encryption utilities
Schema Generator
Powerful schema generator that analyzes JSON data and creates TypeScript interfaces, JSON Schema, GraphQL types, and database schemas. Perfect for type-safe development.
Open Tool →Features
- Generate TypeScript interfaces from JSON
- Create JSON Schema (draft-07)
- Generate GraphQL types
- Create SQL CREATE TABLE statements
- Infer types from sample data
- Handle nested structures and arrays
Use Cases
Creating TypeScript types from API responses
Generating validation schemas
Documenting API contracts
Database schema design
Examples
JSON to TypeScript
{"name": "John", "age": 30, "active": true}interface Root {
name: string;
age: number;
active: boolean;
}Mock Data Generator
Generate realistic mock data including names, emails, addresses, phone numbers, dates, and custom formats. Perfect for testing, prototyping, and database seeding.
Open Tool →Features
- Generate realistic user data (names, emails, addresses)
- Custom data templates
- Multiple output formats (JSON, CSV, SQL)
- Bulk generation (up to 10,000 records)
- Locale support for international data
- Custom field types and patterns
Use Cases
Creating test data for development
Database seeding
API testing and mocking
UI prototyping
UUID/GUID Generator
Generate cryptographically secure UUIDs (Universally Unique Identifiers) supporting multiple versions: v1 (timestamp-based), v4 (random), and v5 (namespace-based).
Open Tool →Features
- Generate UUID v1 (timestamp-based)
- Generate UUID v4 (random)
- Generate UUID v5 (namespace-based)
- Bulk generation
- Copy individual or all UUIDs
- Validation of existing UUIDs
Use Cases
Database primary keys
Session IDs
Transaction identifiers
File naming
Password Generator
Generate cryptographically secure random passwords with customizable length, character sets, and complexity requirements. Includes password strength meter and entropy calculation.
Open Tool →Features
- Customizable password length
- Character set options (uppercase, lowercase, numbers, symbols)
- Exclude ambiguous characters option
- Password strength indicator
- Bulk generation
- Passphrase generation
- Entropy calculation
Use Cases
Creating secure user passwords
Generating API keys
Database credentials
WiFi passwords
Base64 Encoder/Decoder
Encode text and files to Base64 format and decode Base64 strings back to original content. Supports text encoding and file uploads.
Open Tool →Features
- Encode text to Base64
- Decode Base64 to text
- Encode files to Base64
- URL-safe Base64 encoding
- Auto-detect and decode
Use Cases
Encoding credentials for HTTP Basic Auth
Embedding small images in CSS/HTML
Data URLs for inline resources
Email attachment encoding
Hash Generator
Generate cryptographic hashes using industry-standard algorithms including MD5, SHA-1, SHA-256, SHA-512, and more. Includes HMAC support for message authentication.
Open Tool →Features
- Multiple hash algorithms (MD5, SHA-1, SHA-256, SHA-512)
- HMAC support with custom keys
- File hashing support
- Hex and Base64 output formats
- Real-time hash generation
Use Cases
Verifying file integrity
Password hashing (development only)
Generating checksums
Digital signatures
Important Notes
- MD5 and SHA-1 are not recommended for security-critical applications
- Use SHA-256 or SHA-512 for production systems
Development
Essential developer utilities and helpers
Diff Checker
Advanced diff tool that compares two text inputs side-by-side with line-by-line and word-level highlighting. Perfect for code reviews, document comparison, and debugging.
Open Tool →Features
- Side-by-side text comparison
- Line-by-line diff highlighting
- Word-level change detection
- Syntax highlighting for code
- Swap left/right panels
- Export diff results
Use Cases
Code review and comparison
Document version comparison
Configuration file changes
Debugging text differences
Interview Prep Platform
Beyond developer tools, we've built a comprehensive interview prep platform. Practice real interview questions from top tech companies, share your experiences, get answers from the community, and ace your next interview with confidence.
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