Developer Tools

JWT, cURL, CRON, semver, and API developer utilities

• JWT Decoder: Decode and inspect JSON Web Tokens
• JWT Builder: Encode and sign JSON Web Tokens
• HTTP Status Lookup: Look up HTTP status codes and their meanings
• User Agent Parser: Parse user agent strings into components
• CRON Parser: Parse and explain CRON expressions
• Semver Calculator: Parse, compare, and bump semantic versions
• NanoID Generator: Generate compact, URL-friendly unique IDs
• cURL Converter: Convert curl commands to fetch, Python, or Node.js
• Chmod Calculator: Calculate Unix file permissions in octal and symbolic notation
• CIDR Calculator: Calculate CIDR ranges, subnet masks, and host counts
• Bandwidth Calculator: Calculate download time for a given file size and speed
• API Response Viewer: Format and analyze API responses (JSON, XML, text)
• JSONPath Tester: Test JSONPath expressions against JSON data
• GraphQL Formatter: Beautify and format GraphQL queries and schemas
• Dockerfile Builder: Generate Dockerfiles interactively for Node, Python, Go, Java
• DNS Record Reference: Reference for A, AAAA, CNAME, MX, TXT, and other DNS records
• OpenAPI Validator: Validate OpenAPI/Swagger YAML and JSON specs