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GuidBenchBY SMARTFACT

FREE GUID AND UUID GENERATOR

Check a UUID’s format

Updated

UUID validation checks whether a value has a recognised UUID structure. GuidBench identifies its version and variant, recognises supported text forms and finds repeated canonical values in the list you supply.

Inspect UUIDs →See how it works ↓

Free to use. No account, email address or trial. Your identifiers stay in your browser.

UUID inspection identifies a repeated canonical value.
Different text presentation can represent the same UUID.

Recognise supported UUID text

Choose Inspect in the workbench. Supply canonical hyphenated, compact, braced or UUID URN text. The result reports recognised structure, version and variant, rather than treating every identifier-like string as a UUID.

A compact UUID inspected without adding hyphens by hand.
Compact and hyphenated text can describe the same value.

Find repeated values across text forms

Compare a list of up to 1,000 entries and 100,000 input characters. Repeated canonical UUID values are identified even when their presentation differs. This checks only your supplied list.

A duplicate canonical UUID reported in the supplied list.
A list check cannot establish global uniqueness.

Read a refusal before using the value

Spaces are reported rather than silently removed. A malformed value or an ordinary order reference must not be treated as a valid UUID. Base64, ULID and Nano ID are not decoded or validated by this inspector.

An order reference refused as UUID text.
A useful refusal prevents a different kind of value being mistaken for a UUID.

Structure is only one check

Recognised structure does not establish database existence, origin, secure generation or suitability for a particular application. A UUID v7 timestamp describes encoded data and is not proof that an event happened at that time.

MADE FOR DEVELOPERS AND INTEGRATORS

For developers, integrators and people checking exact values before using them in another system.

A USEFUL STARTING POINT

Check what arrived before using it

Two presentations can refer to one UUID, while a familiar business reference may not be a UUID at all. Inspect the original text and review the result before treating it as a separate record key.

FROM QUESTION TO EVIDENCE

Three steps to a useful result.

  1. 01

    Open Inspect

    Open the workbench and choose Inspect.

  2. 02

    Supply the text

    Paste the UUID or list exactly as received.

  3. 03

    Review

    Read structure, version, variant and repeated-value results before reuse.

A CONCRETE EXAMPLE

One value written two ways

A UUID in compact text and the same UUID with hyphens can be reported as a repeated canonical value. Two different strings do not always mean two different identifiers.

WHEN IDENTIFIERS JOIN YOUR WORKFLOW

Give identifiers a useful job.

GuidBench creates identifiers when you ask. These SmartFACT products help with the records and labels that use them.

Invited trial

LabelRules

LabelRules turns label requirements described in plain English into approved rules that select and check labels for each job. It starts with an invited trial.

Explore LabelRules ↗Request a trial ↗

BEFORE YOU START

A few practical answers.

Does valid structure prove uniqueness?

No. It also does not prove secure generation, origin or suitability.

Does this prove that a record exists?

No. No database or external service is queried.

Are spaces removed automatically?

No. Check the reported issue and correct your source deliberately.

Can I inspect Base64?

No. The inspector accepts supported UUID text forms and gives explanatory hints for possible other formats.

What are the current limits?

The generator supports UUID v4 and v7, ULID and Nano ID, not every UUID version. Nano ID length is 8 to 64 characters. UUID v7 uses a fresh random suffix for every ID by default, with no guaranteed order inside a millisecond. Its optional sequential mode keeps one timestamp and increments a random starting suffix across the whole set; each Generate starts a fresh set, with no guaranteed order between sets. ULID retains order within one tab, not across devices or tabs. UUID structure checks do not prove uniqueness, origin, secure generation or application suitability. The inspector accepts canonical, compact, braced and UUID URN text, with a maximum of 100,000 characters. It does not silently remove spaces or decode Base64. A compact UUID is 32 hexadecimal digits without hyphens; Nano ID and ULID are separate identifier formats. Possible other formats get explanatory hints, not a UUID validation result. Identifiers are not passwords or access tokens.

What happens to my data?

Generated identifiers and inspector input stay in this tab’s memory. Refreshing or closing the tab discards them. Copy writes to your clipboard; download creates a local file. The tool has no analytics or saved identifier history. These public pages offer optional analytics separately, under Analytics settings. Ordinary page and catalogue requests may be logged by the hosting provider. No identifier is placed in a URL or sent to SmartFACT.

ONE SMALL JOB, DONE WELL

Put GuidBench to work.

Open the free tool and start with one known example.

Inspect UUIDs →

MORE WAYS TO USE GUIDBENCH

Start with the problem in front of you.

Bulk UUID generator UUID v7 generator Nano ID generator

THE SMARTFACT SUITE

Practical tools. Useful on their own.
Better around the same floor.

Automate factory decisions with rules you describe in plain English. Explore focused SmartFACT services, plus free tools for everyday checks.

Early accessSuggested next step

SmartFACT Data

Maintain reference tables with ConfigSheets or bring shop orders into SmartFACT through reviewed connectors. Check changes and deliver data to the products that use it.

Explore SmartFACT Data ↗
Invited trial

LabelRules

Describe label rules in plain English. Automatically select layouts, resolve customer codes and check each job before printing.

Explore LabelRules ↗
Early access

KitProof

Turn plain English component rules into automatic kit checklists, then check scans against the expected parts and quantities.

Explore KitProof ↗
Early access

WorkSteps

Turn plain English rules into automatic step selection for each unit, with required evidence and a record of completed work.

Explore WorkSteps ↗
Early access

FactorySpec

Apply approved product rules and calculations automatically to turn dimensions and options into manufacturing requirements.

Register early-access interest ↗
Early access

ParcelOffice

Scan the work order and the parcel choice to book the courier and print the labels. Approved plain English rules recommend or choose the parcel.

Explore ParcelOffice ↗
Early access

RefillFlow

Scan an empty container to send the right refill request to stores. Approved plain English rules set the stores queue, priority, ticket printer and escalation.

Explore RefillFlow ↗
Early access

RemnantRack

Label each offcut, find a suitable length before cutting new stock and record what you used. Approved plain English rules decide what to keep and where it goes.

Explore RemnantRack ↗
Invited trial

ToolCustody

Check a shared tool before handover, record who has it and keep damaged or overdue tools out of the next issue. Explore an invited trial for one factory crib.

Explore ToolCustody ↗
Invited trial

StoresFlow

Receive, put away, reserve and issue stores material with barcode checks, keeping held, reserved and available stock apart. Explore an invited trial for one stockroom.

Explore StoresFlow ↗
Invited trial

LotTrail

Follow a lot or serial number through the records your factory already keeps, with the source of each link and the gaps shown. Explore an invited trial with two declared sources.

Explore LotTrail ↗
Early access

CheckStation

Scan an identified unit to get its approved final-inspection checks, then record exact readings with their result, holds and release history.

Register early-access interest ↗
Invited trial

ReclaimStation

Book returned units in, recover and label the usable parts, release them independently and record the unit each goes into. Explore an invited trial for one product family.

Explore ReclaimStation ↗
Free tool

ScannerBench

See the text and key events your keyboard scanner sends. Compare them with the value you expected.

Test a scanner ↗
Free tool

PrintBench

Print a known PDF, measure its reference marks and compare scans from the printed codes.

Check a print ↗
Free tool

CardBench

Create 100 × 50 mm bin and rack cards with Code 128 or QR, from one record or a CSV.

Make bin cards ↗
Free tool

CountBench

Count stock by location with a barcode scanner, compare it with a stock file and export the results. No account needed.

Start a free count ↗
Free tool

BarcodeBench

See exactly what a scanned barcode contains, with hidden characters shown and GS1 fields, check digits and dates explained. No account needed.

Inspect a barcode ↗
Free tool

MatchBench

Scan a reference and each label, see an exact match or the first difference, and download the results. No account needed.

Start a free comparison ↗
Free tool

TagBench

Scan an item or location, note what needs attention, print a review tag and keep a review list. No account needed.

Make a free tag ↗
Free tool

FindBench

Load your own parts and locations CSV, scan a code and see every location it lists. No account needed.

Start a free lookup ↗
Free tool

ManifestBench

Check cartons, pallets or serial numbers against a list with a phone or scanner and see what is missing. No account needed.

Start a free check ↗
Free tool

FeedBench

Check CSV and JSON files exactly as written, preview a column mapping and compare two versions by key. No account needed.

Check a file free ↗
Free tool

CycleBench

Time work cycles and changeovers on a phone, record interruptions with reasons and download the results. No account needed.

Start a free study ↗
Free tool

OffcutBench

Label the offcuts on your rack, find a piece long enough before cutting new stock and record what you used. No account needed.

Track offcuts free ↗
Free tool

TraceBench

Load one or two CSV exports and follow a lot or serial forwards or backwards, with the row behind every link. No account needed.

Start a free trace ↗
Free tool

ReclaimBench

Record the parts recovered from each return, label them with a QR code, check them and record the unit each one goes into. No account needed.

Track recovered parts free ↗
Free tool

GuidBench

Generate GUIDs, UUID v4 and v7, ULIDs and Nano IDs, format and download batches, or inspect a UUID in your browser. No account needed.

You are here
Free tool

OctetBench

Inspect and edit text, hex, Base64 and binary bytes in your browser, reveal hidden characters and compare byte sequences. No account needed.

Inspect some bytes ↗
Free tool

PatternBench

Test JavaScript regular expressions in your browser, inspect matches and captures, preview replacements and check expected cases. No account needed.

Test a pattern ↗
Help

SmartFACT Help

Step-by-step guides and interactive demonstrations for the SmartFACT suite. Read the instructions, watch a task or practise with real product screens and sample data.

Open SmartFACT Help ↗