Free UUID / GUID Generator – Generate RFC 4122 Version 4 UUIDs
The NexVaani UUID / GUID Generator creates cryptographically secure, standard RFC 4122 Version 4 UUIDs for software engineers and database architects. Generate single UUIDs or batches of up to 500 identifiers with uppercase/lowercase and hyphen options.
The NexVaani UUID Generator produces standard RFC 4122 version 4 universally unique identifiers using the browser-native crypto.randomUUID() API.
Smart 1-Click Workflow Chains (Next Steps):
Real-World Use Cases & Applications
- Generating unique primary keys for PostgreSQL, MySQL, and MongoDB databases.
- Creating distributed tracing IDs (traceparent, request-id) for microservices.
- Generating unique mock IDs for unit tests and seed database fixtures.
NexVaani 도구 투명성
처리 위치, 네트워크 동작 및 데이터 보존에 대한 기술적 설명
지원되는 도구는 클라이언트 측 기술을 사용해 웹 브라우저에서 로컬로 실행됩니다.
계산과 텍스트 변환은 브라우저에서 로컬로 수행됩니다.
임시 처리 데이터는 브라우저에서 로컬로 처리되며 NexVaani에 저장되지 않습니다.
내보낸 파일에 워터마크, 스탬프 또는 브랜드가 추가되지 않습니다. Output quality depends on your source file and selected settings.
사용 방법 UUID / GUID Generator (단계별)
Choose Quantity
Select how many UUIDs you want to generate (1 to 500).
Select Formatting
Choose uppercase/lowercase and include or strip hyphens.
Click Generate
Generate cryptographically random UUIDs in browser memory.
Copy UUIDs
Copy individual IDs or copy the full list to your clipboard.
기술 아키텍처 및 실행 방식
RFC 4122 Version 4 UUID Collision Probability
A Version 4 UUID contains 122 random bits, yielding 2^122 (approx 5.3 x 10^36) unique values. The probability of generating a duplicate UUID is so infinitesimal that one would need to generate 1 billion UUIDs per second for 85 years to achieve a 50% collision chance.
UUID_v4 = xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx (where y in [8, 9, A, B])기술적 제한 및 운영상의 제약
- Generates Version 4 (random) UUIDs. Version 1 (time-based) and Version 5 (namespace SHA-1) are not generated by this tool.
주요 사양 및 기능
- W3C Web Crypto Randomness – Uses crypto.randomUUID() for high collision resistance
- Bulk Generation – Generate up to 500 unique UUIDs in one click
- Format Customization – Toggle uppercase, lowercase, and hyphens (with or without dashes)
- Instant Copy & Export – Copy all IDs to clipboard or download as a text file
자주 묻는 질문과 답변
What is the difference between a UUID and a GUID?
UUID (Universally Unique Identifier) and GUID (Globally Unique Identifier) are terms for the same 128-bit identifier standard defined in RFC 4122.
Can two generated UUIDs ever collide?
The chance of a collision with UUID v4 is practically zero (~1 in 2^122).
Are my files uploaded, analyzed, or stored on NexVaani servers?
Where supported, tool inputs and files are processed locally inside your web browser using WebAssembly and HTML5 Canvas. Your files are not uploaded to NexVaani file-processing servers.
평가 UUID / GUID Generator
관련 및 추천 도구 (다음 단계)
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Merge multiple JPG, PNG, and WebP images into a single clean PDF document offline in your browser.
PDF to JPG Converter
Extract every PDF page into high-resolution JPG images directly inside your browser.
PDF Page Deleter
Delete unwanted, blank, or duplicate pages from any PDF document with 1-click visual selection.
JPG Image Compressor
Compress JPG and JPEG photos toward 20KB, 50KB, 100KB, or custom target sizes with quality tuning.