Base64
Encode & decode Base64 strings.
Input
Output
Result will appear here...
URL Encode / Decode
Encode or decode URI components.
Input
Output
Result will appear here...
Hash Generator
Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes.
Algorithm
Input Text
Hash Output
Hash will appear here...
UUID Generator
Generate RFC 4122 UUIDs (v4).
Count
Generated UUIDs
UUIDs will appear here...
JWT Decoder
Decode and inspect JSON Web Tokens. Client-side only, no verification.
JWT Token
Regex Tester
Test regular expressions with live highlighting.
Pattern
Flags
Test String
Match Preview
Matches will be highlighted here...
Markdown Preview
Write Markdown on the left, see rendered output on the right.
Markdown Source
Preview
Preview will appear here...
JSON Previewer
Parse and inspect JSON objects with collapsible nesting.
JSON Input
Awaiting transmission...
Color Converter
Convert between HEX, RGB, and HSL.
Pick Color
HEX
HEX
#e8e8e8
RGB
rgb(232, 232, 232)
HSL
hsl(0, 0%, 91%)
Timestamp Converter
Convert Unix timestamps to human-readable dates and back.
Current Unix Timestamp
—
—
Unix Timestamp → Date
Date will appear here...
Date → Unix Timestamp
Timestamp will appear here...
JS Evaluator
Run JavaScript snippets locally inside the page.
JavaScript Code
Library of Snippets
Result: (Awaiting execution)
Liability Protocol
There is no safety net. You are fully responsible for the code you execute. Nexus is not responsible for crashed tabs, infinite loops, or frozen browsers.