All Tools
Development
21 tools
JSON
Format & validate
Base64
Encode & decode
Hash
SHA-1, SHA-256, SHA-512
UUID
Generate identifiers
UUID v7 / ULID
Time-ordered IDs
URL
Encode & decode
Diff
Compare texts
JWT
Decode JWT tokens
Regex
Test regular expressions
Markdown
Preview markdown
Cron
Parse cron expressions
HTML Encoder
Encode & decode HTML
CSS Minifier
Minify & beautify CSS
IP Subnet
Calculate subnets
JSON ↔ CSV
Convert JSON to CSV
YAML ↔ JSON
Convert YAML and JSON
HTML Table ↔ CSV
Convert tables and CSV
SQL Formatter
Format SQL queries
JS Beautifier
Format JavaScript
HTTP Headers
Parse header blocks
Chmod
Unix permissions calculator
Frequently Asked Questions
What tools do web developers need?
Essential developer tools include JSON formatters for API work, Base64 encoders for data transfer, UUID generators for unique identifiers, regex testers for pattern matching, and JWT decoders for authentication debugging.
What is the difference between formatting and minification?
Formatting adds indentation and line breaks to make code readable for development. Minification removes whitespace and shortens variable names to reduce file size for production.
Why do developers need encoding and decoding tools?
Encoding converts data to safe formats for transmission (URLs, HTML, Base64). Decoding reverses this process. These tools are essential for working with APIs, web forms, and data storage.
What is the best way to debug API responses?
Use a JSON formatter to visualize response structure, a JWT decoder to inspect authentication tokens, and HTTP header analyzers to check request/response metadata.