Convert Multiple Unix Timestamps to Dates at Once
Paste a whole list of Unix timestamps and get ISO dates back, one per line — handles seconds and milliseconds automatically, mixed together. Free, client-side bulk epoch converter.
🔒 100% Client-Side Processing
Your data is processed entirely in your browser and never transmitted to any server.
0 / 100M Limit
Common Use Cases
Reading a whole column of log timestamps
Paste every epoch value from a JSON log or database export at once and get every date back in the same order, one per line.
Interpreting bulk API export data
Translate a list of created_at and expires_at epoch fields into readable dates in one pass instead of converting each individually.
Frequently Asked Questions
- Can I convert more than one timestamp at a time?
- Yes — paste as many timestamps as you want, one per line, and each converts independently. It's built for pasting a whole column of epoch values from a log file, database export, or CSV in one go, rather than converting a single value.
- Does it handle seconds and milliseconds timestamps?
- Yes, per line — 10-digit values are treated as seconds (the classic Unix epoch format) and 13-digit values as milliseconds (JavaScript's Date.now() format), so a mixed list of both still converts correctly line by line.
- What timezone is the converted date in?
- Output is ISO 8601 in UTC (the trailing Z). A Unix timestamp itself has no timezone — it counts seconds since 1970-01-01 UTC — so UTC output is the unambiguous representation.
- I only need to convert one value, with local time and a live clock — is there a better tool?
- Yes — the Epoch Timestamp Converter is built for that: a single value at a time, with local-time and relative-time output, a live current-timestamp clock, and the reverse date-to-epoch direction. This page is optimized specifically for converting a whole list at once.
- Is my data private when I use this tool?
- Yes. This tool runs entirely in your browser using client-side JavaScript — nothing you type is transmitted to, logged by, or stored on any server. You can safely process confidential text, tokens, or code.