Convert plain text and Base64 in either direction.

Convert Unix file permissions between octal and rwx notation.

Understand each field in a five-field cron schedule.

Convert structured CSV and JSON data in either direction.

Generate SHA-2 hashes for text and files locally.

Inspect IPv4 networks and CIDR ranges without sending addresses to an API.

Validate JSON, pretty-print it, minify it, and inspect JSON paths.

Convert between JSON arrays and JSON Lines / NDJSON.

Navigate JSON with standard slash-separated JSON Pointers.

Infer TypeScript types from JSON sample data.

Inspect JWT header, payload, and time claims locally.

Convert integers between binary, octal, decimal, and hexadecimal.

Test JavaScript regex patterns and inspect matches and capture groups.

Compare SemVer versions and inspect prerelease precedence.

Count UTF-8 bytes, Unicode code points, and UTF-16 code units.