🔧 Utility Tools
实用工具集，包括进制转换、编码查询、Cron工具等
Merge & Split PDF
Merge PDFs into one, or split a PDF by every page, every N pages or custom page ranges, all processed locally
Barcode Generator
Generate CODE128/EAN-13/UPC and 9 more barcodes, export PNG and SVG
QR Code Generator
Generate QR code from text or URL
QR Code Reader
Decode QR codes from an image or live camera, multi-code and inverted scan supported
Favicon Generator
Turn an image or text into a full 16x16-512x512 favicon set, export ICO, PNG, ZIP bundle and HTML tags
File Size Converter
Convert between byte, KB, MB, GB, TB file size units
User-Agent Parser
Parse browser User-Agent string, identify device info
IP Lookup
Look up IP address geolocation and network info
Phone Number Parser
Parse and format international phone numbers, identify country/region, calling code and number type
Random Toolkit
All-in-one random toolkit: number, lucky draw, dice, list shuffle
Password Strength Checker
Check password strength and security in real time with entropy scoring and weak-password rules — all computed locally
Calculator
Online scientific calculator: arithmetic, parentheses, powers and common math functions like sin/cos/tan/√/log/ln, with live results