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UUID Generator
Generate RFC 4122 UUID v4 identifiers in bulk with optional uppercase and hyphen formatting.
URL Encoder / Decoder
Encode or decode URL strings with encodeURI or encodeURIComponent, entirely in your browser.
Base64 Encoder
Encode UTF-8 text to Base64 instantly in your browser with byte-size stats.
Base64 Decoder
Decode Base64 strings back to UTF-8 text instantly in your browser with byte-size stats.
Cron Expression Generator
Build Unix cron schedules with presets, custom fields, validation, and plain-English explanations.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text instantly in your browser.
Part of:
Free Developer Converters & Encoders
Regex Tester
Test regular expressions live against sample text with flags, match details, and replace preview.
Regular expression
/
/g
g
i
m
s
u
d
Test string
Contact us at hello@example.com or support@company.io. Invalid: not-an-email
Replace with (preview)
Contact us at [redacted] or [redacted]. Invalid: not-an-email
Match details
Copy replaced output
