> whoami && ls tools/
Small, sharp tools every developer reaches for.
Connection strings, cron expressions, JWTs, GUIDs, regex, appsettings.json — the stuff you look up every few months and never remember. No signup, no server round-trip, nothing leaves your browser.
path
description
status
/connection-string-builder
Build & parse SQL Server connection strings — SQL auth, Windows auth, Azure AD, Encrypt/TrustServerCertificate flags
● ready
/cron-builder
Build & explain cron expressions for Hangfire, standard Unix cron, and Quartz.NET's 6/7-field format
● ready
/jwt-decoder
Decode a JWT's header & payload, inspect claims, check exp/nbf against the current time
● ready
/guid-formatter
Generate GUIDs or reformat a pasted one across .NET's D/N/B/P/X Guid.ToString() formats
● ready
/regex-tester
Test a regex against sample text with live match & group highlighting, mapped to .NET RegexOptions
● ready
/appsettings-validator
Validate & pretty-print appsettings.json, catch duplicate keys and common config mistakes
● ready
/json-formatter
Validate, format, or minify any JSON — errors point to the exact line and column
● ready
/diff-checker
Compare two blocks of text or code line by line — see exactly what was added or removed
● ready
Built by a backend engineer who kept losing the same five minutes to Googling connection string syntax and cron field order. Everything here runs in your browser — no accounts, no telemetry, no data sent anywhere. If a tool is wrong or missing something, that's useful to know.