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 & Bcrypt 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 →About Developer Tools
Format, validate, convert, generate, and debug development data. Each tool follows ToolNest’s responsive interface and clearly explains whether processing happens locally in your browser.