Free Online Converters for Software Engineers, QA, and IT Admins

All conversions happen entirely in your browser — your data never leaves your device.

ObjectGUID Converter

Convert ObjectGUID to ImmutableId (Azure AD) and back — entirely in your browser.

Windows SID Converter

Convert Windows SIDs to binary and hexadecimal. Identifies well-known SIDs.

JWT Inspector

Decode and inspect JWT tokens without a secret — safely in your browser.

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and back. Auto-detects seconds vs milliseconds.