Essential utilities for web developers and programmers. Free and browser-based.
3 tools available
Format, validate, and minify JSON data. Detect syntax errors with helpful messages.
HotEncode text or files to Base64 and decode Base64 strings. URL-safe mode supported.
Encode and decode URLs using encodeURI and encodeURIComponent. Parse URL components.
ToolMaster Pro's developer tools collection provides essential browser-based utilities for web developers, backend engineers, and anyone working with data formats and encodings. These tools run entirely in your browser, making them fast, private, and accessible from any device — no installation or login required.
The JSON Formatter is an indispensable tool for developers working with APIs, configuration files, and data exchange. It parses your JSON and reformats it with proper indentation and syntax highlighting, making it much easier to read and debug. The validator immediately highlights syntax errors with descriptive messages pointing to the exact location of the problem. You can also minify JSON to remove unnecessary whitespace for production use, and sort keys alphabetically for consistent output.
Base64 encoding is widely used in web development for encoding binary data in URLs, embedding images in HTML/CSS via data URIs, encoding email attachments, and storing binary data in JSON. Our Base64 tool supports both standard and URL-safe encoding (replacing + and / with - and _). You can encode text strings or upload files for encoding, and decode any Base64 string back to its original content.
URL encoding (percent-encoding) converts special characters into a format that can be safely transmitted over the internet. Our URL encoder/decoder supports both encodeURI (which preserves URL structure characters) and encodeURIComponent (which encodes all special characters for use in query parameters). The tool also includes a URL parser that breaks down a URL into its individual components: protocol, hostname, port, pathname, query string, and fragment.
Browser-based tools offer several advantages: they're always available without installation, they work on any operating system, your data never leaves your machine (privacy-first), and they're instantly accessible from any device with a web browser. Bookmark these pages to have essential developer utilities always at hand.