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16 tools Private browser utilities

Online Developer Tools

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

Showing 4 tools

JSON Formatter Format or minify strict JSON without rounding numeric literals. Developer Tools

HTML Formatter Format browser-normalized HTML and compare a safe basic preview. Developer Tools

Regex Tester Inspect JavaScript regex matches and captures in an isolated worker. Developer Tools

SQL Formatter Format surrounding SQL while preserving literals and comments. Developer Tools

More tools (12)

URL Encoder/Decoder Encode components, full URLs or individual form values. Developer Tools

Base64 Encoder/Decoder Convert UTF-8 text to Base64 and back. Developer Tools

Password Generator Generate secure random passwords with every selected character type. Developer Tools

Hash Generator Hash exact UTF-8 text, including whitespace or an empty string. Developer Tools

UUID Generator Generate cryptographically random v4 UUID batches. Developer Tools

Password Strength Checker Review a password heuristic or generate a random sample. Developer Tools

CSS Minifier Compact CSS whitespace and compare UTF-8 byte sizes. Developer Tools

HTML Entity Converter Encode Unicode code points or decode HTML entities once. Developer Tools

Binary Converter Convert nonnegative integers exactly between four bases. Developer Tools

JWT Decoder Inspect JWT header and payload without verifying trust. Developer Tools

HTML to Markdown Converter Convert HTML structure to Markdown source and safe preview. Developer Tools

JSON to XML Converter Map JSON to XML while keeping numeric literals exact. Developer Tools

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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.