JWT Decoder & Token Inspector
Decode JWT header and payload online to inspect claims, expiration values and token structure.
Tool category
Developer utilities for everyday debugging
Decode JWT payloads, generate hashes, convert timestamps, test regex patterns and inspect numeric values with focused browser-based tools.
Developer Tools
11 tools available
Hash Generator
Generate SHA-1, SHA-256 and SHA-512 hashes from text using the browser crypto API.
Unix Timestamp Converter
Convert Unix timestamps to readable dates and convert dates back to Unix time.
Regex Tester
Test JavaScript regular expressions against sample text and inspect matches.
Regex Escape Tool
Escape special characters so literal text can be used safely inside a regular expression.
Number Base Converter
Convert numbers between decimal, binary, octal and hexadecimal.
File Size Converter
Convert bytes, KB, MB and GB into related file size units.
SQL Formatter
Make SQL queries easier to read by adding practical line breaks around common clauses.
Cron Expression Explainer
Explain common five-part cron expressions in plain English.
HMAC Generator
Generate an HMAC signature with SHA-256, SHA-384 or SHA-512 using the Web Crypto API.
CSV Delimiter Converter
Convert CSV data between comma, semicolon, tab and pipe delimiters while preserving quoted fields.
Built for direct work
Each tool has its own URL, direct controls, clear output, related tools and a short guide when extra context helps.
Local-first where it fits
Formatting, converting and counting tasks run in the browser. That keeps common workflows responsive and avoids unnecessary uploads for routine text operations.