StackTools

A small collection of everyday developer utilities. Free, no accounts, no tracking.

Tools

• JSON Formatter
  Format, indent and validate JSON.
• UUID Generator
  Generate random v4 UUIDs.
• Base64 Encoder/Decoder
  Encode or decode Base64 text.
• Timestamp Converter
  Convert Unix timestamps to dates and back.
• URL Encoder/Decoder
  Percent-encode or decode URL text.
• JWT Decoder
  Read the header and payload of a JWT.
• Regex Tester
  Test a regular expression against sample text.
• DNS Lookup
  Look up A, AAAA, MX, TXT and other records.
• Text Diff
  Compare two blocks of text line by line.
• Webhook Tester
  Send a test request to a webhook URL and inspect the response.
• Hash Generator
  Generate SHA hashes from text.
• Query String Parser
  Parse query strings or build them from JSON.
• Number Base Converter
  Convert binary, octal, decimal and hexadecimal integers.
• Case Converter
  Convert text into common programming naming styles.
• Subdomain Finder
  Passively enumerate subdomains from certificate transparency logs.
• Passphrase Generator
  Create strong, memorable passphrases with real entropy estimates.
• Cron Expression Explainer
  Explain a cron schedule field by field, aliases included.
• Minecraft Server Config Generator
  Generate server.properties and a tuned JVM start command.