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Encoding2

Base64
URL

Security4

CSP and security headers
Hash / HMAC
JWT
PEM / X.509

Formatters2

Formatters
JSONPath

Converters6

Cron
cURL to code
Epoch / Dates
JSON ⇄ YAML ⇄ CSV
JSON to TypeScript
Number Base

Web design7

Border radius and shapes
Color and contrast
CSS buttons
CSS gradients
CSS shadows
CSS Units
Fluid type and rem

APIs2

Swagger / OpenAPI
User-Agent Parser

Generators3

Passwords
QR
UUID / ULID / KSUID

Text3

Diff
Regex
Text transformer

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Developer tools that run in your browser: no servers, no sign-up, and guides to understand what you are doing.

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Categories

Encoding
Security
Formatters
Converters
Web design
APIs
Generators
Text

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Understand web authentication
Data formats and APIs
Everyday debugging
Securing your website
Visual CSS for your site

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