Essential web developer utilities that run in your browser. Format JSON, encode and decode Base64, test regular expressions, decode JWT tokens, generate UUIDs and hashes, minify CSS, and preview Markdown. Every tool is free, fast, and private.
Debugging a malformed API response, verifying a JWT token, or generating test UUIDs should not require installing a CLI tool or signing up for a service. These browser-based developer tools give you instant results with zero setup. All processing happens locally, so sensitive data like tokens and API responses never leave your machine.
The JSON Formatter validates, beautifies, and minifies JSON data with syntax error detection. Use the Base64 Encoder/Decoder for data encoding tasks and the URL Encoder for percent-encoding special characters.
Inspect JWT tokens to debug authentication flows. Generate cryptographic hashes (MD5, SHA-256, SHA-512) for checksums and data integrity. Create UUIDs for database records and API identifiers.
Test and debug patterns with the Regex Tester. Compress stylesheets with the CSS Minifier. Write documentation with the Markdown Preview editor.
Paste your raw JSON into the JSON Formatter tool on ToolboxHub. It instantly beautifies the output with proper indentation, validates the syntax, and highlights any errors. You can also minify JSON for production use.
A UUID (Universally Unique Identifier) is a 128-bit value used to uniquely identify data across systems. ToolboxHub's UUID Generator creates RFC 4122 compliant v1 (time-based) and v4 (random) UUIDs instantly. You can generate a single UUID or bulk-generate multiple at once.
Use the Base64 Encoder/Decoder tool to convert plain text to Base64 or decode Base64 strings back to text. This is commonly used for embedding data in URLs, emails, or API payloads. The tool runs entirely in your browser.
JWT (JSON Web Token) is a standard for securely transmitting information between parties. The JWT Decoder on ToolboxHub lets you paste a token to inspect its header, payload claims, and expiration time without needing a secret key.
The Regex Tester lets you type a pattern and test string, then shows matches, capture groups, and flags in real time. It supports JavaScript regex syntax and provides instant visual feedback as you type.
Paste your CSS into the CSS Minifier tool. It removes whitespace, comments, and redundant rules to produce a compressed version that loads faster. The output is ready to copy and use in production.
Use the Hash Generator tool to enter any text and instantly get its SHA-256 hash. The tool also supports MD5, SHA-1, and SHA-512. Hashes are useful for verifying file integrity, creating checksums, and password hashing.
Yes. Every tool on ToolboxHub processes data entirely in your browser using client-side JavaScript. No data is ever sent to a server, making them safe for tokens, API keys, and other sensitive information.