Developer
Encoding, formatting, and everyday programming helpers.
Base64 encode/decode
Encode text as Base64 (or Base64URL) and decode Base64 back to UTF‑8 text.
Case converter
Convert text between camelCase, PascalCase, snake_case, kebab-case, and Title Case.
CRC32 checksum
Compute CRC32 (IEEE) checksum of text (UTF‑8 bytes) in hex and decimal.
FNV‑1a hash (32‑bit)
Compute a fast, non-cryptographic 32-bit hash (FNV‑1a) in hex and decimal.
IPv4 subnet calculator
Compute network/broadcast addresses, netmask, and host range from an IPv4 address and CIDR prefix.
JSON checker
Validate JSON and show the top-level type (object, array, string, number, boolean, or null).
JSON formatter
Pretty-print and minify JSON. Optionally sort keys for stable, comparable output.
JWT decoder
Decode a JWT’s header and payload JSON (no signature verification).
Password generator
Generate random (or seeded, deterministic) passwords with configurable character sets.
Regex escape
Escape special characters so text can be used safely inside a regular expression.
Slugify text
Convert text into a URL-friendly slug (kebab-case or snake_case).
Text comparer
Compare two texts and get a line-based diff plus an overall similarity score.
Unix timestamp converter
Convert between Unix epoch timestamps and ISO 8601 date/time (UTC).
URL encode/decode
Encode text for use in URLs (percent-encoding) and decode percent-encoded strings back to text.
URL parser
Parse a URL and extract components like protocol, host, path, query parameters, and fragment.
UUID / GUID generator
Generate UUIDv4 identifiers (aka GUIDs). Optionally use a seed for deterministic, reproducible output.