16 tools Private browser utilities

Online Developer Tools

Format, encode, and validate code and data for faster development workflows.

Showing 16 tools

JSON Formatter Format, validate, and beautify JSON data with syntax errors. Developer Tools

URL Encoder/Decoder Encode or decode URLs and query strings for safe transmission. Developer Tools

Base64 Encoder/Decoder Encode text to Base64 or decode Base64 strings back to text. Developer Tools

HTML Formatter Format, beautify, and minify your HTML code instantly. Developer Tools

Regex Tester Test your regular expressions in real-time with syntax highlighting. Developer Tools

Password Generator Generate strong, secure passwords with customizable options. Developer Tools

Hash Generator Generate MD5, SHA-1, SHA-256, and SHA-512 hashes of any text. Developer Tools

UUID Generator Generate random UUIDs (v4) for databases, APIs, and testing. Developer Tools

Password Strength Checker Generate strong passwords and check password strength with detailed analysis. Developer Tools

CSS Minifier Minify and compress CSS code to reduce file size for production. Developer Tools

HTML Entity Converter Encode and decode HTML entities like & < > and special characters. Developer Tools

Binary Converter Convert numbers between binary, decimal, hexadecimal, and octal. Developer Tools

JWT Decoder Decode JWT tokens and inspect header and payload. Developer Tools

SQL Formatter Format and beautify SQL queries online. Developer Tools

HTML to Markdown Converter Convert HTML to clean Markdown format online. Developer Tools

JSON to XML Converter Convert JSON data to structured XML format online. Developer Tools

More utility groups

Explore other categories

15 tools Text Tools Transform, analyze, and format text with powerful utilities for writers and content creators. Word CounterCharacter CounterCase Converter 10 tools Calculators Solve math problems and compute values with quick, precise calculators. Percentage CalculatorAge CalculatorBMI Calculator 16 tools Converters Convert between formats, units, and encodings instantly. QR Code GeneratorColor ConverterMarkdown to HTML 5 tools PDF Tools Merge, split, compress, and convert PDF documents right in your browser. PDF MergerPDF SplitterPDF Compressor 11 tools SEO Tools Generate meta tags, check keyword density, create sitemaps, and optimize your site for search engines. Meta Tag GeneratorKeyword Density CheckerSitemap Generator 4 tools Design Tools Check color contrast, convert color formats, and analyze your designs for accessibility. Color Contrast CheckerColor Palette GeneratorGradient Generator

Category guide

About Developer Tools

Use free developer tools online for everyday debugging and data cleanup. Format JSON, decode JWT tokens, test regular expressions, convert Base64, generate hashes, format SQL, and transform HTML or XML without sending snippets to a server. These browser-based utilities are built for API payloads, logs, configs, and test data that should remain local.