UUID Generator (v4 and v7)

Generate one or thousands of UUIDs - v4 random or v7 time-ordered

๐Ÿ”’ 100% ๋ธŒ๋ผ์šฐ์ € ๋‚ด๐Ÿ†“ ํ‰์ƒ ๋ฌด๋ฃŒโšก ๊ฐ€์ž… ์—†์Œ
์ฐธ๊ณ : ์•„๋ž˜ ํˆด ์ธํ„ฐํŽ˜์ด์Šค๋Š” ํ˜„์žฌ ์˜์–ด๋กœ๋งŒ ์ œ๊ณต๋ฉ๋‹ˆ๋‹ค. UI๋Š” ํ•˜๋‚˜์”ฉ ๋ฒˆ์—ญ ์ค‘์ž…๋‹ˆ๋‹ค. ์ด ํˆด์„ ์˜์–ด๋กœ ๋ณด๊ธฐ โ†’

v4 is fully random. v7 embeds a millisecond timestamp so IDs sort chronologically - ideal for database primary keys.

์‚ฌ์šฉ๋ฒ•

  1. 1
    Pick a version

    v4 is fully random. v7 embeds a timestamp so IDs sort chronologically - ideal for database keys.

  2. 2
    Set the count

    Generate 1 UUID or up to 1,000 at once for seeding databases or test data.

  3. 3
    Copy them

    Click Copy all to send the list to your clipboard, one per line.

UUID Generator (v4 and v7) ์†Œ๊ฐœ

Free online UUID generator. Create RFC 4122 v4 (fully random) or v7 (time-ordered) UUIDs, one at a time or up to 1,000 in bulk. Uses the browser's cryptographic random source. Runs entirely in your browser. 712 Tools์˜ UUID Generator (v4 and v7)์€ ์ตœ์‹  JavaScript API๋ฅผ ์‚ฌ์šฉํ•ด ์—ฌ๋Ÿฌ๋ถ„์˜ browser์—์„œ ์™„์ „ํžˆ ๋™์ž‘ํ•ฉ๋‹ˆ๋‹ค - server๊ฐ€ ์—ฌ๋Ÿฌ๋ถ„์˜ ๋ฐ์ดํ„ฐ๋ฅผ ๋ณผ ์ผ์ด ์ ˆ๋Œ€ ์—†์Šต๋‹ˆ๋‹ค. ์ฆ‰, ์ฆ‰๊ฐ์ ์ธ ๊ฒฐ๊ณผ, ์™„์ „ํ•œ ํ”„๋ผ์ด๋ฒ„์‹œ, ๊ทธ๋ฆฌ๊ณ  ์—…๋กœ๋“œ ์ œํ•œ์ด ์—†์Šต๋‹ˆ๋‹ค.

debugging ์„ธ์…˜, ๋น ๋ฅธ sanity check, ๋˜๋Š” ํ”„๋กœ๋•์…˜ ์ธ์‹œ๋˜ํŠธ - ์–ด๋–ค ์ƒํ™ฉ์ด๋“  ์ด ํˆด์€ ์›ํ•˜๋Š” ๋งŒํผ ๋ฌด๋ฃŒ๋กœ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์›Œํ„ฐ๋งˆํฌ ์—†์Œ, ๊ฐ€์ž… ์—†์Œ, ํˆด ๋‚ด ๊ด‘๊ณ  ์—†์Œ.

์ž์ฃผ ๋ฌป๋Š” ์งˆ๋ฌธ

What's the difference between v4 and v7?

v4 is 122 bits of randomness. v7 puts a 48-bit millisecond timestamp in the first bytes, so IDs are sortable by creation time - much better for database primary keys.

How random are these?

They use window.crypto.getRandomValues, the same source used for TLS keys. Not Math.random.

Are the UUIDs stored?

No. They're generated and displayed locally - nothing is sent to any server.

๋” ์ฝ๊ธฐ

5 ๋ถ„ ์†Œ์š”

UUID v4 vs v7: which one should you use in 2026?

v4 is random. v7 is time-ordered. That one difference decides your database performance. Here's when each wins, and why v7 is quietly becoming the default.

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