Free Online Converters
Convert between units, timezones, timestamps, encodings, and formats. Instant, accurate, no account needed.
Featured Converters
About Converters
Conversion tools bridge the gap between different systems, units, and formats. Whether you need to convert metres to feet, a Unix timestamp to a readable date, or a string to Base64, Multi-Toolkit has you covered.
**Unit Converter**
Convert between length, weight, temperature, speed, area, volume, and digital storage units. Supports both metric and imperial systems with real-time conversion.
**Timezone Converter**
Convert times between any two time zones worldwide. Includes a world clock showing current times in major cities — useful for scheduling international meetings.
**Timestamp Converter**
Convert Unix epoch timestamps to human-readable date/time and vice versa. Shows local time, UTC, ISO 8601, and relative time ("5 hours ago").
**Base64 Encoder / Decoder**
Encode text or binary files to Base64 and decode Base64 strings. Supports standard and URL-safe Base64 variants.
**URL Encoder / Decoder**
Percent-encode special characters for use in URLs and query strings. Essential for building API requests and debugging redirects.
How-To Guides
- 1Open the Unit Converter and select a category (Length, Weight, Temperature, etc.).
- 2Enter your value in the source unit field.
- 3All equivalent values in other units update instantly.
- 4Copy any result with the copy button.
- 1Open the Timestamp Converter.
- 2Paste your Unix timestamp (e.g., 1717200000) into the input field.
- 3See the equivalent date and time in local, UTC, and ISO 8601 formats.
- 4To convert a date to timestamp, use the date input and click "To Timestamp".
- 1Open the URL Encoder / Decoder.
- 2Paste the URL or query string you need to encode.
- 3Encoded output appears instantly — special characters become percent-encoded.
- 4Use the Decode tab to reverse the process.
All Converters (5)
Frequently Asked Questions
What units can I convert?
The Unit Converter supports: Length, Weight/Mass, Temperature, Speed, Area, Volume, Digital Storage, Pressure, Energy, and Fuel Efficiency.
What is a Unix timestamp?
A Unix timestamp is the number of seconds elapsed since January 1, 1970, 00:00:00 UTC. It is widely used in programming and databases to store dates.
What is URL encoding?
URL encoding (percent-encoding) converts characters that are not safe in URLs into a percent-followed-by-hex format. For example, space becomes %20, & becomes %26.
What is the difference between UTC and GMT?
UTC (Coordinated Universal Time) and GMT (Greenwich Mean Time) are nearly identical for practical purposes. UTC is the scientific standard; GMT is the geographic timezone.
Why use Base64 encoding?
Base64 encodes binary data as ASCII text so it can be safely transmitted over systems designed for text (like email, JSON, and URLs). Common uses include embedding images in CSS and encoding file attachments.