GUID Generator

Generate one or up to 1000 random Version 4 UUIDs with the browser cryptography API. Format them as uppercase or lowercase, with optional braces and hyphens, then copy or download TXT or single-column CSV.

How to Use the GUID Generator

Create random Version 4 UUIDs locally, match the formatting your consumer expects, then copy or download before importing elsewhere.

  1. Choose Single or Multiple; in Multiple mode, pick a batch size from 1 to 1000.
  2. Toggle uppercase, curly braces, and hyphens to match the destination format.
  3. Select Generate to replace the current result set with newly generated Version 4 UUIDs.
  4. Review one sample value carefully (case, braces, hyphens) before using the full list.
  5. Copy all values or download TXT / CSV, then validate uniqueness rules in the destination system.

When this helps

Use it when you need disposable random keys for test fixtures, plugin registration practice data, correlation identifiers in local scripts, or preallocated primary keys where the consumer accepts random Version 4 UUIDs. It is not a reservation service for live Dataverse rows.

Example output

With lowercase, hyphens on, and braces off, a typical value looks like 3fa85f64-5717-4562-b3fc-2c963f66afa6. Enabling braces wraps the same value as {3fa85f64-5717-4562-b3fc-2c963f66afa6}. Disabling hyphens removes the dashes after generation.

Generation method

  • Formatting is applied after crypto.randomUUID() returns the canonical hyphenated lowercase UUID.
  • The CSV download always uses one column named guid; it does not add entity columns or import metadata.
  • TXT is one GUID per line with no header.

Mistakes and limitations

  • Do not assume braces or uppercase are accepted—many APIs and SQL clients expect a specific GUID string shape.
  • Random GUIDs are identifiers, not secrets, passwords, or authorization tokens.
  • The tool cannot prove a GUID is unused in your environment and cannot create sequential or name-based identifiers.

Privacy note

All generation and download creation run in your browser. No GUID list is uploaded to ToolsLibrary. If you paste results into tickets or chats, you are sharing identifiers outside this page.

FAQ

How are the GUIDs generated?

Each value comes from the browser's crypto.randomUUID(), which produces a random Version 4 UUID locally. The tool does not hash names, use timestamps, or read existing Dataverse or database records.

Which formats and batch sizes are available?

Choose lowercase or uppercase, optional curly braces, and optional hyphens. Multiple mode offers 1, 10, 25, 50, 100, 500, or 1000 values. Downloads are plain TXT (one GUID per line) or a single-column CSV with a guid header.

Are generated GUIDs checked against my database or Dataverse?

No. Generation is browser-local and performs no uniqueness lookup. Random UUID collisions are extremely unlikely, but your destination system must still enforce its own uniqueness and format rules.

Does Generate append to the previous list?

No. Selecting Generate replaces the current result set with a fresh batch. Copy or download first if you need to keep earlier values.

Can I create sequential, name-based, or time-based UUIDs?

No. Only random Version 4 UUIDs are supported. There is no UUID Version 1, 3, 5, or custom namespace mode.

What should I verify before importing GUIDs into Dynamics or a database?

Confirm whether the target accepts braces, hyphens, and letter case; whether the column expects a uniqueidentifier/GUID type; and that your import mapping does not treat the CSV header as a data row incorrectly.

Do these GUIDs leave my browser?

Generation and file downloads occur in the browser with no ToolsLibrary server request. Sharing a copied list or downloaded file is under your control—treat exported IDs according to your data policies.