Developer Tools

Format, validate, encode, decode and minify common web data and code directly in your browser with lightweight developer utilities.

Quick developer utilities for everyday cleanup

The developer tools focus on small jobs that interrupt a workflow: formatting JSON, encoding or decoding Base64 and URLs, and reducing HTML, CSS or JavaScript text. They run in the browser so you can inspect the result immediately.

For production code, keep your original source and test transformed output. Lightweight browser tools are convenient for snippets and checks, while large projects are better handled by a versioned build pipeline.

The utilities do not replace linters, compilers or test suites. Use them to inspect and transform small inputs quickly, then run normal project validation before shipping a production change.

Inputs can be copied back out immediately, which makes these pages handy for examples, documentation and troubleshooting. For confidential production data, redact secrets and identifiers even when the transformation runs locally.

All Developer Tools

JSON Formatter

Format, minify and validate JSON with clear error locations.

Base64 Encoder / Decoder

Encode text to Base64 or decode a Base64 string back to text.

URL Encoder / Decoder

Percent-encode or decode a URL or query string.

HTML Minifier

Strip comments and unnecessary whitespace from HTML markup.

CSS Minifier

Compress CSS by removing comments, whitespace and redundant characters.

JavaScript Minifier

Reduce JavaScript file size with a light, safe minifier.

Use small developer utilities safely

Formatters, encoders and minifiers are convenience tools, not substitutes for testing or security controls. Base64 and URL encoding do not encrypt data, and minification should happen after you have a readable source version stored in version control.

When debugging JSON or URLs, fix one layer at a time: syntax first, then data shape, then application behaviour. That makes it easier to tell whether the problem is invalid input or code that handles valid input incorrectly.

The developer tools on ToolNova run in your browser. Even so, a good habit is to avoid pasting production secrets, private keys or live credentials into any utility unless you fully understand how it handles data.

Read practical guides