About Timestamp Decoder

About This Tool

Timestamp Decoder is a free online tool that auto-detects and decodes 16 different timestamp and time-based ID formats. Paste any value — Unix timestamp, MongoDB ObjectId, UUID v1/v7, ULID, Snowflake ID, KSUID, CUID, XID, Windows FILETIME, Excel serial date, .NET Ticks, and more — and instantly see the decoded date and time with timezone support. All processing happens entirely in your browser.

Key Features

• Auto-detect and decode 16 timestamp and time-based ID formats
• Simultaneous conversion across all supported formats
• Timezone support — view decoded times in any timezone
• One-click copy for converted values
• Client-side processing — your data never leaves your browser

Who Is This For?

This tool is designed for backend developers debugging timestamps in databases and APIs, DevOps engineers inspecting log entries and distributed system IDs, data engineers working with various time-based formats, and anyone who needs to quickly decode an unfamiliar timestamp or ID value.

Privacy

Your timestamps and IDs are processed locally in your browser using JavaScript. Nothing is sent to any server. This tool is safe to use with production data and internal system identifiers.