OnlineDeveloperTool
Generators & Hashes

UUID Parser Online

Read the version and variant of a UUID.

Updated

This tool runs in your browser. No account or signup is required.

Common UUID Parser tasks

Developers typically reach for this page when they need to parse a UUID into version and variant; inspect UUID timestamp fields; decode a UUID online. The tool is built for quick, practical work rather than a generic demo.

What matters in a uuid parser workflow

When developers compare online tools for this job, the useful capabilities tend to center on version, variant, timestamps, structured inspection. This page keeps those practical needs in mind while linking to related tools when a different workflow is a better fit.

What is UUID Parser?

UUID Parser checks the UUID format and reports its version digit and variant.

What problem does it solve?

You need IDs for test data, or you need to know whether an ID from a log or database is well-formed. Doing that by eye does not scale.

How to use UUID Parser

  1. Paste the UUID.
  2. Press the parse button.
  3. Read the version and variant.

Example

Input

123e4567-e89b-12d3-a456-426614174000

Output

Version: 1
Variant: RFC 4122 (Leach-Salz)

What you can do with UUID Parser

  • Parse a UUID
  • Find UUID version
  • Inspect a GUID

Common use cases

  • Seeding test data with unique IDs
  • Checking an ID copied from logs
  • Working out which UUID version a system produces

Related developer tasks

  • Parse a UUID
  • Find UUID version
  • Inspect a GUID

What the UUID parser shows

After a format check, the tool reads the version digit (the first character of the third group) and reports the RFC 4122 variant.

123e4567-e89b-12d3-a456-426614174000

// result
Version: 1
Variant: RFC 4122 (Leach-Salz)

Reading a UUID by eye

  • In xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx, M is the version and N starts with 8, 9, a or b for the RFC 4122 variant.
  • The parser does not extract a timestamp or MAC address, only the version and variant.

Related: UUID Validator, UUID Generator, Number Base Converter

UUID Parser FAQ

What is a UUID?

A UUID (or GUID) is a 128-bit identifier written as 32 hex digits in five groups, for example 123e4567-e89b-12d3-a456-426614174000.

Which versions does the validator accept?

It accepts the standard layout with a version digit from 1 to 5 and an RFC 4122 variant.

Is my data sent to a server?

The processing runs in your browser, so what you paste into the tool is not uploaded for processing. As with any tool, avoid pasting live secrets you cannot afford to leak.

Does it work on a GUID from .NET?

Yes, if the GUID is written with hyphens in the standard format, since a GUID uses the same 128-bit layout.

Looking for something else? Browse all developer tools.

onlinedevelopertool.com is a collection of 54 free, browser-based utilities for the small jobs that interrupt real work: formatting a JSON response, decoding a token, converting a timestamp, generating a UUID or checking a hash. Each tool has its own page with a short explanation, a worked example and answers to common questions, so you can use it and learn what it does at the same time.

There is no account to create and nothing to install. Tools run in your browser, so the text you paste is processed on your own device. The one exception is the Website Status Checker, which sends a request from your browser to the address you enter.

Three steps: paste your input, click the tool, copy the result, all inside your browser
Popular developer utilities: JWT decoder, UUID generator, Base64 decoder, SHA-256 hash, regex tester and timestamp converter

What you can do here

  • JSON Tools

    Format, validate, beautify and minify JSON, generate C#, TypeScript, Java, Python, Go, PHP and Kotlin models from it, or convert between JSON, YAML and CSV.

  • Encoders & Decoders

    URL, Base64 and HTML encoding and decoding, plus a JWT decoder for reading token claims.

  • Generators & Hashes

    Generate UUIDs and JWTs, validate UUIDs, and create MD5, SHA-256 and SHA-512 hashes.

  • Web Tools

    Timestamps, color codes, query strings and cron expressions - the small things web work keeps throwing at you.

  • Text & Data

    Format XML and YAML, count text, change case, make slugs, test regex, diff two texts and convert number bases.

  • Website Checking

    Check whether a website or URL is reachable from your browser.

Quick developer reference

  • JSON

    Keys and strings must use double quotes, and trailing commas and comments are not allowed. Those are the three most common reasons a payload fails to parse.

    Validate JSON

  • JWT

    A JSON Web Token is three Base64URL parts joined by dots: header, payload and signature. Decoding shows the claims but does not prove the token is genuine; only signature verification does.

    Decode a JWT

  • Base64

    Base64 is an encoding, not encryption. Anyone can reverse it, and it makes data roughly one third larger, so never use it to hide secrets.

    Decode Base64

  • UUID

    A version 4 UUID is made of random bits and written as 8-4-4-4-12 hexadecimal characters. Collisions are astronomically unlikely, which is why they work well as identifiers.

    Generate a UUID

  • Timestamps

    A Unix timestamp counts time since 1 January 1970 UTC. Ten digits usually means seconds and thirteen digits usually means milliseconds.

    Convert a timestamp

  • Hashes

    MD5 is fine for quick checksums but is not safe for security. Prefer SHA-256 or SHA-512, and remember that hashing is one-way and is not encryption.

    Create a SHA-256 hash

Missing a tool you need? Visit the contact page and tell us what you reach for most often. You can also browse every tool or read the About page to see how the site is built and what it does with your data.