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About TimeTools

Simple for everyone. Powerful for developers.

TimeTools started because I was tired of solving the same problem over and over.

I’m a backend developer, and I work with Unix timestamps almost every day. Like most developers, I used existing timestamp converters whenever I needed to turn a raw value into a readable date.

The frustration started when I had to compare multiple timestamps. Imagine debugging an API response or a log file with several timestamp fields — I’d paste one value after another into an online converter, but after a few conversions I’d completely lose track of which converted date belonged to which field. Was it createdAt, expiresAt, or lastLogin? I’d end up going back to the original JSON and repeating the whole process.

The tools could convert timestamps. They couldn’t preserve the context.

So I built TimeTools for myself.

The first feature wasn’t another timestamp converter — it was the ability to compare multiple timestamps while giving each one a label. Instead of a list of anonymous values, I could immediately see what each timestamp represented.

Then I added the feature that quickly became my favorite: paste in raw JSON, and TimeTools automatically detects the Unix timestamps, converts them, and uses the JSON field names as labels. No copying values one by one. No manually naming them. No losing context. For example, instead of manually converting each value from:

{
  "createdAt": 1751972400,
  "lastLogin": 1751976000,
  "expiresAt": 1752062400
}

TimeTools detects the timestamps automatically and understands what each one represents. See this exact example on the Compare page →

Once the timestamps have labels, TimeTools can also visualize them on a timeline. Instead of just seeing converted dates, you can instantly understand the order of events, the time between each step, and the total duration from the first event to the last. I built this because, when debugging APIs or analyzing logs, understanding when something happened is only half the story — understanding how events relate to each other is usually what matters most.

I never planned to build a collection of time tools. I just wanted to solve one annoying problem I kept running into at work.

As more ideas came up, TimeTools gradually grew into a collection of utilities for working with timestamps, dates, durations, Discord timestamps, time zones, and more. Every new tool starts with the same question: would this actually save me time while I’m working?

If the answer is yes, I build it.

Hopefully, it’ll save you some time too.

How it works

Every tool on this site runs entirely in your browser. There is no conversion server, no account system, and no database on the other end. When you paste a timestamp, your device does all the work and the result appears instantly — because there is nothing to wait for. The output covers every stack — Go, Python, Java, .NET, PHP, JavaScript — so you’re never stuck copy-pasting from a language-specific converter.

We also try to be shareable by default. Most tools encode your input in the URL so you can bookmark a result or send it to a colleague with a single copy-paste of the address bar. Those parameters aren’t used for tracking or analytics — they just make the link work.

Privacy, in plain terms

  • ✓No cookies — none, zero, not even a session cookie.
  • ✓No data is sent to any server. Timestamps, dates, and JWTs you paste are never transmitted.
  • ✓No account, no sign-up, no email required.
  • ✓No advertising or behavioural tracking.
  • ✓Your browser's localStorage is used only to remember your own preferences — hidden rows, pinned tools, theme — and only on your device.

Vercel (our hosting provider) may record standard web-server metadata — IP address, path, and timestamp — in edge logs as part of normal infrastructure operation. We do not access or analyse these logs for user tracking. Full privacy policy →

Linking to TimeTools

Most tools read their input from the page address, so you can build links that open with a result already loaded — handy for bug reports, runbooks, documentation, or sending a colleague exactly what you see. A machine-readable version of this reference lives at /llms.txt.

  • Epoch Converter
    value
    Unix timestamp in seconds, milliseconds, microseconds, or nanoseconds (unit auto-detected), or a date string such as ISO 8601
    https://timetools.dev/?value=1782558101
  • Date → Epoch
    value
    a date or datetime string — ISO 8601, RFC 3339, SQL datetime, or a named-month date like “March 15, 2026”
    https://timetools.dev/date-to-epoch?value=2026-07-02T14%3A00%3A00Z
  • Add Time to Timestamp
    value
    the base Unix timestamp to shift (any unit, auto-detected)
    shift
    signed amount to add, e.g. -90
    unit
    one of seconds, minutes, hours, days
    https://timetools.dev/add-to-timestamp?value=1782558101&shift=-90&unit=minutes
  • Unix Countdown
    t
    target Unix timestamp in seconds
    label
    optional display label for the countdown
    https://timetools.dev/unix-countdown?t=1830297600&label=Launch
  • Compare Timestamps
    t1, t2, …
    one timestamp per row (any supported format)
    l1, l2, …
    optional label for the matching row
    tz
    IANA timezone for the local-time column, e.g. Europe/Warsaw
    fmt
    force every row to one format instead of auto-detecting — unix-seconds, unix-ms, unix-us, unix-ns, dotnet-ticks, cocoa, filetime, webkit, ntp, excel
    https://timetools.dev/compare?t1=1782558101&l1=Alert&t2=1782562100&l2=Resolved&tz=UTC
  • World Clock
    tz
    comma-separated IANA timezones, in display order
    https://timetools.dev/world-clock?tz=UTC,America%2FNew_York,Asia%2FTokyo
  • Timezone Converter
    t
    the timestamp or date string to convert
    tz
    comma-separated IANA timezones to show
    https://timetools.dev/timezone-converter?t=1782558101&tz=UTC,Europe%2FLondon
  • DST Transitions
    tz
    a single IANA timezone
    https://timetools.dev/dst-transitions?tz=America%2FNew_York
  • Cron Expression Parser
    expr
    a URL-encoded cron expression (5 or 6 fields)
    tz
    IANA timezone for the next-run times
    https://timetools.dev/cron?expr=0+9+*+*+1-5&tz=UTC
  • Date Difference
    start
    start date, YYYY-MM-DD
    end
    end date, YYYY-MM-DD
    includeEnd
    set to 1 to count the end date as a full day
    https://timetools.dev/date-difference?start=2026-01-01&end=2026-07-07&includeEnd=1
  • Business Days Counter
    start
    start date, YYYY-MM-DD
    end
    end date, YYYY-MM-DD
    includeEnd
    set to 1 to count the end date as a full day
    https://timetools.dev/business-days?start=2026-01-01&end=2026-07-07&includeEnd=1
  • Add / Subtract Time
    value
    the base date, YYYY-MM-DD
    shift
    signed amount to add, e.g. -30
    unit
    one of days, weeks, months, years
    https://timetools.dev/add-time?value=2026-07-07&shift=30&unit=days
  • ISO 8601 Duration Parser
    value
    an ISO 8601 duration string, e.g. P1DT2H30M
    https://timetools.dev/iso8601-duration?value=P1DT2H30M
  • Seconds to Human
    value
    a number of seconds
    https://timetools.dev/seconds-to-human?value=86400
  • Discord Timestamp
    t
    the target Unix timestamp in seconds
    tz
    IANA timezone the entered wall-clock time belongs to, e.g. America/New_York
    https://timetools.dev/discord-timestamp?t=1782558101&tz=America%2FNew_York
  • MongoDB ObjectID Converter
    value
    a 24-hex-char MongoDB ObjectID, bare or ObjectId("...")-wrapped
    https://timetools.dev/mongodb-objectid?value=507f1f77bcf86cd799439011
  • UUID v7 to Timestamp
    value
    a UUID (v7, v6, or v1), bare or dashed, optionally urn:uuid:-prefixed or brace-wrapped
    https://timetools.dev/uuid-v7?value=018c7e69-6f4e-7abc-9def-0123456789ab
  • ULID to Timestamp
    value
    a 26-character ULID (case-insensitive, tolerant of Crockford's I/L/O aliases)
    https://timetools.dev/ulid?value=01ARZ3NDEKTSV4RRFFQ69G5FAV
  • Snowflake ID Decoder
    value
    a snowflake ID (Discord, Twitter/X, Mastodon, or Sonyflake — platform auto-detected), a Discord message link, or a tweet URL
    https://timetools.dev/snowflake?value=175928847299117063
  • .NET Ticks Converter
    value
    a .NET DateTime.Ticks value
    https://timetools.dev/dotnet-ticks?value=638712345678901234
  • FILETIME Converter
    value
    a Windows FILETIME value
    https://timetools.dev/windows-filetime?value=133795932000000000
  • Chrome / WebKit Timestamp
    value
    a Chrome/WebKit timestamp (microseconds since 1601-01-01)
    https://timetools.dev/webkit-timestamp?value=13350000000000000
  • Excel Date Converter
    value
    an Excel date serial number
    https://timetools.dev/excel-date?value=46204.5
  • Cocoa Timestamp Converter
    value
    an Apple Cocoa / Core Foundation timestamp (seconds since 2001-01-01)
    https://timetools.dev/cocoa-timestamp?value=804700800
  • NTP Timestamp Converter
    value
    an NTP timestamp (seconds since 1900-01-01)
    https://timetools.dev/ntp-timestamp?value=3990211200

Free, and staying that way

TimeTools is free to use with no rate limits, paywalls, or ads. If that ever changes, we will say so clearly rather than hiding it behind a terms update.

TimeTools is an independent project, built and maintained by a single software engineer. The goal is the best possible experience for working with time-related data — while staying approachable for anyone. Have an idea or hit a bug? Send feedback →

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