ID Decoder (UUID, ULID, ObjectId, Snowflake)
Paste one or many identifiers — UUID (with or without dashes), ULID, MongoDB ObjectId, Snowflake or Unix timestamp — and the tool detects the format, shows raw bytes in hex, explains UUID version and variant, breaks ObjectId and Snowflake fields apart, and prints UTC, local and relative times. Pick Twitter, Discord or a custom Snowflake epoch when needed.
Runs 100% in your browser — nothing you paste leaves your device.
Read the full guide to this tool
Notes
- UUID v4 is fully random and carries no timestamp; v1, v7, ULID, ObjectId and Snowflake all embed creation time.
- Ambiguous numeric strings (Unix ms vs Snowflake) are flagged. Snowflake epoch defaults to Twitter / X.
- Runs 100% in your browser — nothing you paste leaves your device.
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