20+ Developer Tools — All Free

All Developer Tools in
One Fast Toolkit

JSON formatter, Base64 encoder, Regex tester, XML converter, QR generator, and more practical tools. No login. No uploads. Runs entirely in your browser.

Instant Results

Privacy First

Client-Side Only

Browse by Category

Popular Tools

{}Popular

JSON Formatter

Beautify, minify and validate JSON with syntax highlighting

Formatters

</>Popular

XML Formatter

Format and pretty print XML documents with indentation control

Formatters

.{}Popular

CSS Formatter & Minifier

Beautify or minify CSS stylesheets with configurable indentation

Formatters

✓{}Popular

JSON Validator

Validate JSON syntax and structure with detailed error reporting

Validators

.*Popular

Regex Tester

Test and debug regular expressions with live match highlighting

Validators

{>}Popular

JSON to XML Converter

Convert JSON data to XML format with custom root element support

Converters

Y→JPopular

YAML to JSON Converter

Convert YAML files and strings to JSON format with full YAML 1.2 support

Converters

CSVPopular

CSV to JSON Converter

Convert CSV files to JSON arrays with custom delimiter support

Converters

⏱Popular

Epoch Timestamp Converter

Convert Unix epoch timestamps to human readable dates and vice versa

Converters

B64Popular

Base64 Encoder / Decoder

Encode and decode Base64 strings, files, and binary data online

Encoders

URLPopular

URL Encoder / Decoder

Encode and decode URLs and query strings with percent-encoding support

Encoders

#Popular

Hash Generator

Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes using Web Crypto API

Encoders

//Popular

URL Parser

Break down any URL into protocol, hostname, path, query parameters and hash

Utilities

▦Popular

QR Code Generator

Generate QR codes from text, URLs or any data with custom styling

Generators

Why FullDevKit?

Built for developers who need instant, reliable tools without friction. Every tool is optimized for speed, accuracy, and a clean developer experience.

Zero Data Exposure

Every tool runs locally in your browser. Your sensitive data — API keys, credentials, configs — never touches a server.

Instant Live Results

Results update as you type. No submit buttons, no page loads, no waiting. Powered by modern browser APIs.

Production Grade

Accurate implementations for JSON, XML, Base64, hashing, QR codes, and more. Trusted by developers worldwide.

When to use browser tools

Use FullDevKit for short snippets, copied API responses, config fragments, encoded values, and one-off checks where opening a full project is slower than pasting into a focused utility.

What to verify afterwards

Formatter and converter output should still be tested with the target API, parser, or deployment tool. The site helps you inspect data quickly, but production systems may enforce stricter schemas.

How privacy is handled

The core tools run in your browser, so pasted JSON, XML, URLs, hashes, and timestamps are processed locally. Avoid pasting live secrets into any website unless your own security policy allows it.