Category
Identifiers & Auth
Generate and decode UUIDs, ULIDs, Snowflake IDs, and build authentication headers.
Basic Auth Encoder / Decoder
Build or read an HTTP Basic Authorization header (RFC 7617): encode a user-id and password to Base64, or decode a credential back to its parts.
Bearer Header Builder
Turn an access token into an Authorization: Bearer header (RFC 6750), with a curl snippet and an RFC 6750 b64token conformance check.
GUID Inspector
Generate Windows-compatible version 4 GUIDs and inspect their UUID/GUID representation.
MongoDB ObjectId Timestamp Decoder
Read the creation timestamp out of a 12-byte MongoDB ObjectId, plus the remaining bytes as raw hex, entirely in the browser.
NanoID Generator
Generate NanoIDs in the browser: a compact URL-safe random identifier, 21 characters by default, with a configurable size and custom alphabet.
OAuth Scope Formatter
Normalize an OAuth 2.0 scope list (RFC 6749 §3.3): split on ASCII whitespace only, drop duplicates, flag invalid scope-tokens, and re-emit as the SP wire form, one per line, or JSON.
Snowflake ID Decoder
Decode a 64-bit Snowflake ID under an explicit provider layout (Twitter/X, Discord, Instagram, or a custom epoch): timestamp, worker, and sequence bits.
ULID Generator
Generate ULIDs in the browser: a 48-bit millisecond timestamp plus 80 bits of crypto randomness, in 26-character Crockford Base32, with a monotonic option.
UUID Generator
Generate random version 4 (RFC 9562) UUIDs in the browser, with formatting options and bulk output.
UUID Inspector
Normalize a UUID or GUID and inspect its variant, version, and fields that are encoded by that version.
Windows Permission Reference
Search a compact reference of common Windows file and directory permissions.
Windows SID Parser
Parse a Windows security identifier into its revision, authority, subauthorities, and known built-in name.