ToolWorld

Developer Tools

Format, validate, encode and decode the everyday building blocks of web development — JSON, HTML, CSS, JavaScript, URLs and more — without installing a CLI or extension.

JSON Formatter

Format, validate and beautify JSON with clear syntax highlighting and error messages.

JSON Minifier

Compress JSON by removing whitespace and line breaks to reduce payload size.

HTML Formatter

Beautify minified or messy HTML with consistent indentation for easy reading.

HTML Minifier

Minify HTML by stripping comments, whitespace and line breaks for faster page loads.

CSS Beautifier

Format minified CSS into a clean, indented, easy-to-read stylesheet.

CSS Minifier

Minify CSS by removing comments and whitespace to shrink file size.

JavaScript Beautifier

Format minified JavaScript into readable, indented code.

JavaScript Minifier

Minify JavaScript by stripping comments and unnecessary whitespace.

URL Encoder / Decoder

Encode text for safe use in URLs, or decode percent-encoded URLs back to plain text.

Base64 Encoder / Decoder

Encode text or files to Base64, or decode Base64 back to its original form.

UUID Generator

Generate random UUID v4 identifiers, one at a time or in bulk.

Timestamp Converter

Convert between Unix timestamps and human-readable dates in any time zone.

HTML Entity Encoder / Decoder

Encode special characters into HTML entities or decode entities back to text.

JWT Decoder

Decode a JSON Web Token's header and payload to inspect its contents locally.

Regex Tester

Test regular expressions against sample text with live match highlighting.

Frequently Asked Questions

Is my code or data sent to a server?
No. Formatting, validation and encoding all happen locally in your browser using JavaScript.
Can I use these tools for production code?
Yes, but always keep a backup of your original file before overwriting it with a formatted or minified version.
Do these tools support large files?
Most handle typical file sizes comfortably; very large files (multiple megabytes) may be slower depending on your device.

Explore Other Categories

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Convert any unit instantly

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