Developer Tools
Format, validate, convert, generate, and debug development data.
JSON Formatter
Beautify, minify, and validate JSON.
Open tool →JWT Decoder
Inspect JWT headers, payloads, and expiry.
Open tool →Base64 Encoder & Decoder
Convert text and Base64 safely.
Open tool →Color Matcher
Create matching color palettes.
Open tool →URL Encoder & Decoder
Encode and decode URL components.
Open tool →UUID Generator
Generate secure UUID values in bulk.
Open tool →Hash & HMAC Generator
Create hashes, HMACs, and bcrypt values.
Open tool →Unix Timestamp Converter
Convert timestamps and readable dates.
Open tool →Regex Tester
Test patterns, groups, and replacements.
Open tool →SQL Formatter
Beautify and minify SQL queries.
Open tool →JSON to CSV
Turn structured JSON into CSV.
Open tool →Cron Expression Generator
Build and explain cron schedules.
Open tool →YAML ↔ JSON Converter
Convert configuration formats.
Open tool →Password Generator
Generate strong private passwords.
Open tool →QR Code Generator
Create customizable QR codes.
Open tool →HTML Formatter
Beautify, minify, and validate HTML.
Open tool →HTML to PDF
Render HTML and CSS as a PDF.
Open tool →XML Formatter & Validator
Beautify, minify, and validate XML.
Open tool →JavaScript Formatter
Format and minify JavaScript source.
Open tool →CSS Formatter
Beautify and minify CSS stylesheets.
Open tool →Markdown Editor
Write Markdown with a safe preview.
Open tool →CSV Viewer & Editor
View, validate, edit, and download CSV.
Open tool →JSON Compare
Compare JSON documents structurally.
Open tool →JSON Schema Validator
Validate data against JSON Schema.
Open tool →Subnet / CIDR Calculator
Calculate IPv4 and IPv6 ranges, masks, and address capacity.
Open tool →About Developer Tools
Developer tools provide focused utilities for inspecting, converting, validating, and generating data used in everyday software work. The collection includes JSON and SQL formatting, Base64 conversion, JWT inspection, regular-expression testing, hashes, UUIDs, timestamps, cron expressions, color values, and related helpers. They are useful for debugging an API response, preparing a configuration sample, checking syntax before a commit, or explaining a data format to a teammate.
A formatter or decoder should support review, not replace application-level validation and security controls. Never paste active credentials, private keys, production tokens, or customer data into diagnostic tools. Check character encoding and the destination system’s exact specification before using generated output. Tool pages document supported formats, known limitations, concrete examples, and adjacent utilities so developers can move from inspection to the next workflow step without guesswork.