Developer Tools
Free online developer tools for encoding, decoding, formatting, validating, and generating data. All processing happens in your browser - privacy-first, no signup required.
Developer Tools for Your Projects
Our free developer tools help you with daily coding, data, and system tasks. From Base64 encoding to cron expressions – these tools support you with common developer workflows.
All tools work entirely in your browser – no data is sent to servers. 100% privacy-first, no signup required.
Base64 Encoder / Decoder
Encode text or files to Base64, or decode Base64 back to its original form. Supports URL-safe Base64 and data URLs. Essential tool for developers working with APIs, data transmission, and embedding binary data in text formats. All processing happens in your browser for complete privacy.
Use Tool →JSON Formatter & Validator
Format, validate, minify, and explore JSON data. Interactive tree view with syntax highlighting and error detection. Essential tool for developers working with APIs, configuration files, and data processing. All processing happens in your browser for privacy and speed.
Use Tool →Cron Expression Generator
Build and understand cron expressions visually. Schedule tasks with human-readable explanations and next execution preview. Essential tool for developers, system administrators, and DevOps engineers working with scheduled tasks, automated jobs, and periodic maintenance. Perfect for Linux, macOS, and cloud platforms that use cron syntax.
Use Tool →Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes for text or files. Verify hash integrity and compare hashes.
Use Tool →Markdown Editor
Write and preview Markdown in real-time with live rendering. Includes formatting toolbar, templates, and export to HTML.
Use Tool →Regex Tester & Builder
Test and debug regular expressions in real-time with match highlighting and pattern explanations. Includes common pattern library.
Use Tool →Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds with multiple date formats.
Use Tool →UUID / GUID Generator
Generate universally unique identifiers instantly. Supports UUID v4, v1-like, and various output formats with bulk generation. Essential for developers working with databases, APIs, distributed systems, and unique identifier requirements. All generation happens in your browser using cryptographically secure randomness.
Use Tool →Chmod Calculator
Calculate Unix/Linux file permissions. Convert between numeric (octal) and symbolic notation.
Use Tool →CSS Generator Suite
Generate CSS for Box Shadow, Border Radius, Flexbox, and Grid. Visual editors with live preview.
Use Tool →JWT Decoder
Decode and analyze JWT tokens entirely client-side. Validate token structure and check expiration status.
Use Tool →Open Graph Preview
Preview how your page will look when shared on social media. Generate and validate OG meta tags.
Use Tool →URL & HTML Encoder
Encode and decode URLs, HTML entities, and more. All processing happens client-side.
Use Tool →Popular Use Cases
Data Processing
- Base64 encoding for API authentication
- JSON formatting and validation
- Hash generation for file integrity
System & Automation
- Cron expressions for scheduled tasks
- Unix timestamps for log analysis
- UUID generation for unique identifiers