Can a ULID tell me when an event happened?
Yes. The leading portion encodes timestamp information, which makes ULIDs useful for sorting and trace review.
ULID Parser
Parse ULID timestamp and randomness
JSON & Data
π 100% client-side β your data never leaves this pagePage mode
Input
Quick CTA
Paste one ULID per line and inspect timestamps plus validity first; random-segment details stay in Deep.
Output
ULID parse result will appear here
π 100% client-side β’ ULID timestamp decoder
Next step workflow
Page reading mode
Quick keeps the summary, direct answers, and next steps so you can validate fit and get a result faster.
About this tool
ULID Parser decodes ULID strings into human-readable timestamp and randomness details. It validates the 26-character Crockford Base32 format, extracts creation time, and presents the random portion in hex for easier inspection. This is useful when analyzing event timelines, verifying ID generation behavior, and debugging distributed systems that rely on lexicographically sortable IDs. Batch input is supported so you can parse multiple IDs at once and compare generation windows quickly. Processing is entirely local in your browser for fast and privacy-safe troubleshooting.
Direct Answers
Does letter case matter when parsing ULIDs?
The parser can normalize mixed case, but invalid characters or wrong length still make the ULID unusable.