Online Converter Tools — Timezone, Timestamp, Base64, HEX

What Are the Converter Tools?

IPerfect.Net offers a set of free online converters built for developers and IT professionals. These cover the most common day-to-day conversion tasks — from converting a Unix timestamp to a human-readable date, to encoding strings in Base64, to calculating the difference between two datetime values. All tools work instantly in the browser with no registration.

Open Converter Tools

Available Converters

Timezone Converter Convert the current time between any two time zones from the full IANA timezone database.

Unix Timestamp ↔ DateTime Convert a Unix millisecond or second timestamp to a human-readable date, or the reverse.

Date & Time Diff Calculate the difference between two date/time values in days, hours, minutes, and seconds.

Decimal ↔ HEX Convert any decimal integer to its hexadecimal equivalent and back.

8-bit Array to 32-bit Int Combine a 4-byte array into a 32-bit integer — useful for IoT and embedded protocol work.

String Length Measure the byte and character length of any string instantly.

Battery Backup Calculator Calculate runtime from battery capacity (mAh) and current consumption (mA).

Timezone Converter — Details

The timezone converter lets you pick any source timezone and any target timezone from the full IANA database (600+ zones) and see the current local time in both simultaneously. It is useful for scheduling calls across regions, or for verifying that server timestamps are being interpreted correctly.

Example

Source: Asia/Kolkata → 14:30 IST
Target: America/New_York → 05:00 EDT

The converter is also available as an API endpoint:

GET https://iperfect.net/ajax/getISTFromUTCDateTime.php?datetime=2026-06-01+10:00:00

Unix Timestamp Converter — Details

Unix timestamps are widely used in APIs, databases, and log files. They represent the number of seconds (or milliseconds) elapsed since January 1, 1970 (UTC). The IPerfect.Net timestamp converter handles both second-precision and millisecond-precision timestamps and displays the result in your selected timezone.

Example

Input: 1748822400000 (milliseconds)
Output: 2026-06-01 00:00:00 UTC

API usage:

GET https://iperfect.net/ajax/getDateTimeFromMiliseconds.php?ms=1748822400000

HEX / Decimal Converter

Developers working with network protocols, memory addresses, color codes, or microcontroller registers frequently need to switch between decimal and hexadecimal. The HEX converter handles both directions with no upper limit on the input value.

Examples

255 (decimal) → FF (hex)
1A3F (hex) → 6719 (decimal)

Battery Backup Calculator

The battery backup calculator is a simple tool aimed at IoT and embedded developers. Enter your battery's capacity in milliamp-hours (mAh) and your circuit's average current consumption in milliamps (mA), and the tool tells you the theoretical runtime.

Formula

Runtime (hours) = Battery Capacity (mAh) ÷ Current Consumption (mA)

For example, a 2000 mAh battery powering a device that draws 50 mA gives approximately 40 hours of runtime.

Other Tools on IPerfect.Net

Online Shared Notepad — Sync notes across devices without an app.
IP Lookup & Network Tools — IP details, ping, DNS, port scanner.
Global File Transfer — Send files between devices over the internet.
JSON / Code Formatter — Format and validate JSON, XML, SQL online.