Network and DevOps Tools

Calculate network address, subnet mask, host range and wildcard mask for IPv4 CIDR blocks.

Search and filter common HTTP status codes with bilingual explanations, categories and troubleshooting hints.

Convert numbers across bases and transform text into hex, binary, Base64 and Unicode bytes.

Encode JSON into Protobuf bytes or decode hex / Base64 Protobuf payloads with a .proto schema in the browser.

Convert common docker run commands into a starter docker-compose service block.

Generate common desktop and mobile User-Agent strings for testing requests and client detection logic.

Inspect a file in the browser and identify common formats from extension, MIME type and magic bytes.

Inspect text or files as hex bytes, edit hexadecimal content, and decode it back to text locally in the browser.

Look up common HTTP request headers and quickly review client, auth and caching related fields.

Browse common HTTP response headers, understand caching, security and delivery-related fields.

Look up common MIME types, file extensions and browser-facing content-type values in one fast table.