HTTP Status Code Lookup
Look up the meaning of common HTTP response status codes.
Developer Toolsâš¡ Developer Tools
All developer tools on Toolzees — free and instant.
IPv4 Subnet Calculator
Calculate network, mask, broadcast, host range, and capacity from CIDR.
Developer ToolsFile Permission Decoder
Decode permissions such as 644 or 755 into rwx notation.
Developer ToolsCHMOD Calculator
Create numeric and symbolic Unix file permissions.
Developer ToolsCron Expression Builder
Build standard five-field cron schedule expressions.
Developer ToolsRegex Escape Tool
Escape plain text so it can be safely inserted into a regular expression.
Developer ToolsURL Normalizer
Clean URLs and remove common tracking parameters.
Developer ToolsURL Parser
Break a URL into protocol, host, path, query parameters, and fragment.
Developer ToolsQuery String Builder
Build a URL query string from key-value pairs.
Developer ToolsQuery String Parser
Turn a URL query string into readable JSON.
Developer Tools