Search common registered HTTP status codes and plain-English explanations.

Create secure version 4 UUIDs individually or in a batch.

Create strings from secure random bytes with custom length and characters.

Hash UTF-8 text locally with SHA-256 using browser cryptography.

Calculate and compare a local file SHA-256 checksum.

Convert Unix seconds or milliseconds to UTC and local date/time.

Create scannable QR codes with browser-local SVG and PNG downloads.

Inspect pasted HTTP request or response headers, including repeated fields.

Infer TypeScript interfaces from a JSON sample without uploading data.

Parse a URL or query string into ordered, editable parameter rows.