Developer & IoT Tools

All tools in this category

• HEX / Base64 decoder
  Convert HEX values or Base64 strings into readable text (ASCII/UTF-8) – entirely in your browser.
• JSON formatter
  Validate JSON, highlight errors and pretty-print it – locally in your browser.
• Cron expression tester
  Validate cron expressions and preview the next scheduled runs – locally in your browser.
• QR code generator
  Convert URLs or WiFi credentials into QR codes – directly in your browser, no upload.
• Unix timestamp converter
  Convert Unix timestamps to local time and vice versa – directly in your browser.

About these tools

This developer toolset covers everyday workflows: format and validate JSON, decode HEX or Base64 payloads, test cron expressions, generate QR codes for URLs or Wi-Fi, and convert Unix timestamps to human-readable time. Everything runs offline in your browser.

What you can do with Developer & IoT Tools

Tools for developers and IoT tinkerers – fast, private, no login. This category currently includes 5 focused tools for common tasks that can be completed directly in the browser without installing software or creating an account. The workflow is intentionally simple: open a tool, enter data or select a file, review the result and download or copy it immediately.

This developer toolset covers everyday workflows: format and validate JSON, decode HEX or Base64 payloads, test cron expressions, generate QR codes for URLs or Wi-Fi, and convert Unix timestamps to human-readable time. Everything runs offline in your browser. The category is designed for fast workflows where privacy, short loading times and simple controls matter more than a complex cloud platform. You can finish one specific task without launching a large application or transferring private content to external servers.

Frequently asked questions