# UUID Generator > Generate v4 UUIDs singly or in bulk, using your browser's cryptographic random source. Free, unlimited, and nothing is transmitted. - URL: https://farvixo.com/tools/developer/uuid-generator - Category: Developer Tools (https://farvixo.com/tools/developer) - Price: Free - Last reviewed: 7 August 2026 - Publisher: Farvixo Technologies ## What is UUID Generator? UUID Generator is a free developer utility from Farvixo that lets you generate v4 UUIDs in bulk. Your input is processed locally in the browser — nothing is sent to a server, which matters when the payload is a token, a config file or production data. Free, unlimited, no sign-up. ## Specifications | Property | Value | | --- | --- | | Tool | UUID Generator — Developer Tools | | Purpose | Generate v4 UUIDs in bulk | | Input | Text or values you enter directly | | Output | Processed output you can copy to the clipboard or download | | Processing | In your browser — files are never uploaded to a server | | Price | Free, unlimited, no account required | | Limitations | Bounded by your device's memory and CPU rather than a server quota | ## How to use UUID Generator 1. **Paste your code or data** — Paste your snippet into UUID Generator. It stays on your device, which matters when you are handling tokens, config or production data. 2. **Run it** — UUID Generator processes the input instantly and points at the exact line when something is malformed, so you can fix it rather than hunt for it. 3. **Copy the output** — Copy the result to your clipboard or download it. Free, unlimited and no sign-up. ## Use cases - Inspecting or reformatting an API payload while debugging - Decoding a token or encoded value without pasting it into an unknown website - Generating test data or identifiers during development - Validating a config file before it is committed or deployed ## Tips - Because processing is local, it is safe to paste real credentials or production payloads here — nothing is transmitted or logged. - When parsing fails, the reported line and column point at the first invalid token, which is usually just after the real mistake. - Bookmark the tool page directly; it loads without an account and works offline once cached. ## Common problems - **Parsing fails on valid-looking input** — Usually a trailing comma, a smart quote pasted from a document, or an unescaped backslash. Check the reported position first. - **Output has unexpected whitespace or line endings** — The source used CRLF line endings or a non-breaking space. Normalise the input before processing. - **Non-English characters come out wrong** — The input was not UTF-8. Re-save the source as UTF-8 and paste it again. ## FAQ ### Are these UUIDs actually random? Yes. They use the platform's cryptographic random number generator, not Math.random(). The distinction matters — a UUID from a weak source can be predictable, which is a real problem if you are using it as anything resembling a token. ### Can two UUIDs ever collide? In principle yes, in practice no. A v4 UUID has 122 random bits; you would need to generate billions per second for a century to have a meaningful chance. Treat collisions as impossible for any real application. ### Should I use a UUID as a database primary key? It is a genuine trade-off. UUIDs let you generate ids without coordinating with the database, which is invaluable in distributed systems. They are also larger than an integer and randomly ordered, which fragments B-tree indexes. UUIDv7, which is time-ordered, addresses that. ### Is a UUID a secret? Not inherently — it is an identifier, not a credential. A v4 UUID is unguessable enough to work as a capability URL for something low-risk, but anything genuinely sensitive needs real authentication. ### What is the difference between UUID versions? v4 is fully random and the usual default. v1 embeds a timestamp and MAC address, which leaks information. v7 is time-ordered, which indexes far better in a database. ## Related tools - [JSON Formatter](https://farvixo.com/tools/developer/json-formatter): Pretty-print and minify JSON - [CSS Gradient Generator](https://farvixo.com/tools/developer/gradient-generator): Design studio for gradients — AI prompt, image palette extraction, mesh/aurora/noise types, animation & 6 export formats - [Hash Generator](https://farvixo.com/tools/developer/hash-generator): MD5, SHA-1, SHA-256, SHA-512 from text or files - [HTML Online Viewer](https://farvixo.com/tools/developer/html-viewer): Advanced in-browser IDE — live HTML/CSS/JS editor, sandboxed preview, device simulation, console, AI fix/improve/generate & ZIP export - [JSON Validator](https://farvixo.com/tools/developer/json-validator): Validate JSON and locate syntax errors - [Base64 Encoder & Decoder](https://farvixo.com/tools/developer/base64-encoder-decoder): Encode and decode Base64 text and files --- > Machine-readable index: [llms.txt](https://farvixo.com/llms.txt) · full corpus: [llms-full.txt](https://farvixo.com/llms-full.txt) · agent skill: [skill.md](https://farvixo.com/skill.md). Any page on this site is available as Markdown by appending `.md` to its URL or sending `Accept: text/markdown`.