JWT Debugger
Decodes JWT header and payload in the browser to inspect claims, expiry, and token structure.
Content hub · 25 tools
Developer
Small utilities for developers debugging tokens, time, hashes, metadata, JavaScript, cURL, or sample data.
Support everyday debugging tasks
The Developer group focuses on repeated small tasks: reading JWTs, converting Unix time, hashing text, generating meta tags, explaining crontab, beautifying JavaScript, converting cURL, and building UTM links.
Use this group when
- Debug tokens, timestamps, hashes, or JavaScript snippets.
- Prepare metadata, UTM links, and test data for websites.
- Convert cURL or quickly check cron schedules.
Tool list
Unix Time Converter
Converts Unix timestamps to local/UTC time and converts date-time values back to timestamps.
Hash Text (Crypto)
Generates SHA-1, SHA-256, SHA-384, and SHA-512 hashes for text comparison.
Meta Tag Generator
Generates SEO, Open Graph, and Twitter/X meta tags with image previews for websites.
Crontab Explainer
Explains the five basic fields of a cron expression and when the scheduled task runs.
JS Beautify
Formats JavaScript quickly so snippets are easier to read before debugging or sharing.
JS Obfuscator
Applies basic JavaScript obfuscation to small snippets when direct reading should be harder.
Curl to Code
Converts basic cURL commands into editable JavaScript, PHP, or Python snippets.
Fake Data Generator
Generates sample JSON data such as names, emails, phone numbers, and addresses for quick tests.
Campaign URL Builder
Builds campaign URLs with UTM source, medium, campaign, term, and content parameters.
API Request Builder
Builds and sends HTTP requests quickly to inspect methods, headers, bodies, status codes, and responses while debugging APIs.
Query String Parser
Splits URLs into host, path, fragment, and query parameters for inspection or URL rebuilding.
JSONPath Tester
Runs basic JSONPath expressions against sample JSON to quickly extract fields from API responses.
JWT Generator
Generates and signs HS256, HS384, or HS512 JWTs from header, payload, and secret in the browser.
Unix Time Range Helper
Creates timestamps for now, expiry moments, day boundaries, weeks, and months while testing systems.
Advanced Regex Tester
Tests regex patterns, flags, match positions, capture groups, and replacement output.
HTML CSS JS Minifier
Minifies HTML, CSS, or JavaScript snippets by removing comments and extra whitespace.
CSS Formatter
Formats CSS blocks and properties so stylesheets are easier to read during review or debugging.
SQL Formatter
Formats SELECT, JOIN, WHERE, GROUP BY, ORDER BY, and common SQL statements for readability.
.env Validator
Checks invalid lines, duplicate keys, and empty variables in .env files before deployment.
YAML TOML Validator
Checks basic YAML/TOML structure such as indentation, sections, key-value pairs, and common line errors.
Dockerfile Generator
Generates starter Dockerfiles for Node.js, PHP Apache, Python, Go, or static sites.
Nginx Rewrite Tester
Simulates simple Nginx regex rewrites to see whether a path matches and what it becomes.
Gitignore Generator
Composes .gitignore files for stacks such as Node.js, PHP, Python, Docker, Windows, macOS, and IDEs.
SemVer Comparator
Compares semantic versions and checks whether a version satisfies ranges such as ^, ~, >=, or <.
Frequently asked questions
Do Developer tools require sign-in?
No. They are designed to open quickly and run directly in the browser.
