OONN
Developer tools
Networks, hashes, encodings, data formats, Cron, number bases and web colors.
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BIN / OCT / DEC / HEX converter
Convert arbitrarily large integers between numeral systems.
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Color picker and converter
Pick a color, convert HEX/RGB/HSL and inspect contrast.
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Cron expression generator and parser
Build or parse five-field Cron and preview the next five runs.
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Hash generator, validator and encoder
MD5/SHA hashes, Base64 and URL encoding with optional validation.
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IPv4 / IPv6 subnet calculator
CIDR, masks, network ranges, host counts and IPv4 broadcast addresses.
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JSON / YAML / XML / CSV converter
Validate and transform configuration and tabular data formats.
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Data size converter
Convert bytes and decimal or binary KB, MB, GB and TB units.