QuickKit
7 tools

Developer Tools

Essential utilities for developers — format, encode, decode, and generate.

Tools

JSON Formatter & Validator

Format, validate, and prettify JSON data instantly.

Open

Base64 Encoder/Decoder

Encode text or files to Base64 and decode Base64 strings.

Open

JWT Decoder

Decode and inspect JSON Web Token headers and payloads.

Open

UUID Generator

Generate UUID v1 and v4 values in bulk.

Open

Timestamp Converter

Convert between Unix timestamps and human-readable dates.

Open

URL Encoder/Decoder

Encode and decode URLs and query string parameters.

Open

QR Code Generator

Generate QR codes for any URL or text — customize colors and download as PNG. Free, no watermark.

Open

Free Developer Tools Online — No Signup Required

QuickKit's developer tools give you instant access to the utilities you use every day — JSON formatting, Base64 encoding, JWT decoding, UUID generation, and more. All tools run 100% in your browser with zero data sent to any server. No login, no install, no cost.

✓Format and validate JSON with syntax highlighting
✓Encode and decode Base64 strings and files
✓Decode JWT tokens and inspect claims instantly
✓Generate UUID v1/v4 in bulk
✓Convert Unix timestamps to human-readable dates
✓Encode/decode URLs and query parameters
✓Generate QR codes with custom colors and sizes

These tools are built for speed. No page reloads, no server round-trips — results appear as you type. Bookmark QuickKit and replace 7 different browser tabs with one.