Developer Tools

Free Online Developer Tools

9 essential utilities — encode, decode, generate, convert. Everything runs locally in your browser. Nothing leaves this page.

JSON to .env
Convert AWS Secrets Manager JSON or key-value objects to .env format.
Encoding
Base64
Encode text to Base64 or decode Base64 back to plain text.
Encoding
JWT Decoder
Decode and inspect JSON Web Tokens — header, payload, and expiry.
Security
URL Encode/Decode
Encode or decode URLs and query parameters instantly.
Encoding
Password Generator
Generate strong, random passwords with customizable options.
Security
QR Code Generator
Generate QR codes from text, URLs, or any data.
Data
Cron Builder
Visual cron expression editor with human-readable descriptions.
DevOps
YAML / JSON
Convert between YAML and JSON formats seamlessly.
Encoding
UUID Generator
Generate RFC 4122 compliant UUIDs (v4) in bulk.
DevOps
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JSON to .env
Local Only

Convert AWS Secrets Manager JSON or any key-value JSON to .env format.

JSON Input
Paste JSON
.env OutputReady
0 Variables0 Characters0 Lines
Base64 Encoder / Decoder
Local Only

Encode text to Base64 or decode Base64 back to plain text.

Plain Text
Base64
JWT Decoder
Local Only

Decode and inspect JSON Web Tokens. No data is sent to any server.

Paste JWT Token
URL Encoder / Decoder
Local Only

Encode or decode URLs and query parameters.

Decoded (Plain)
Encoded
Password Generator
Local Only

Generate strong, random passwords with customizable options.

Length
20
Click Generate
QR Code Generator
Local Only

Generate QR codes from text, URLs, or any data. Runs entirely in your browser.

Content
QR code will appear here
Cron Expression Editor
Local Only

The quick and simple editor for cron schedule expressions.

minute
hour
day (month)
month
day (week)
Every minute
Next 5 execution times
  • 1. Calculating...
Examples
YAML / JSON Converter
Local Only

Convert between YAML and JSON formats.

YAML
JSON
UUID Generator
Local Only
Your UUID Version 4
click generate
Bulk Generate
How many?
Generated UUIDs0 UUIDs

A Version 4 UUID is a universally unique identifier generated using random numbers per RFC 4122. Generated client-side using crypto.getRandomValues() — nothing is sent to any server.