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UUID Generator
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UUID Generator
RFC 4122 universally unique identifiers, freshly minted.
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Options
v4
Count
5
Version
v4 (random)
nil (all zeros)
Uppercase
Hyphens
Output
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Random RFC 4122 identifiers
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Convert between CSV and JSON
YAML ↔ JSON
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Convert HTML to Markdown and back
Case Converter
camel · snake · kebab · slug
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SHA-1, 256, 384, 512
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Encode/decode HTML entities
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bin · oct · dec · hex
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Parse Cookie / Set-Cookie headers
Data
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HEX · RGB · HSL · OKLCH
Palette + Contrast
Tints, shades, WCAG ratio
Timestamp
Epoch ↔ ISO ↔ human
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Pleasant clock, with timezones
Cron Expression
Humanize cron + next runs
IP / CIDR
Subnet math, range, mask
HTTP Status
Look up HTTP status codes
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Parse a browser UA string
Image Compressor
Resize, compress, convert