qlvlp tools

Barcode Generator

Online barcode generator, supports CODE128, EAN-13, UPC and more formats

Base Converter

Convert numbers between different bases (2, 8, 10, 16, 32, 36, 62, 64)

BASE64 Encode/Decode(text)

Base64 text encode and decode

BASE64 Encode/Decode(image)

Base64 image encode and decode

Datetime Calculator

Calculate time difference between two datetime points

JSON Editor

Online json editor. Edit, format and compact etc.

QR Code Generator

Online QR code generator, supports text, URL, vCard, etc.

Unix Timestamp Converter

Convert between Unix timestamp and date time

URL Encode/Decode

URL percent-encoding and decoding

Roman Numeral Converter

Convert decimal numbers to Roman numerals and vice versa online. Fast, accurate conversion for numbers 1-3999.

Password Generator

Generate secure random passwords online. Create strong, cryptographically secure passwords instantly.

Cron Expression Generator

Generate cron expressions online. Easy-to-use visual editor for creating scheduled task expressions. Provides natural language explanation for generated expressions.

Subnet Calculator

Calculate IP subnet information online. Quickly determine network address, broadcast address, subnet mask, and available host addresses.

Color Picker

Pick and convert colors between HEX, RGB, and HSL formats online. Easily copy color values in any format.

Screen Color Picker

Pick colors from anywhere on your screen, including outside the browser window. Copy HEX, RGB, and HSL color values with one click.

SHA Hash Generator

Generate SHA-1, SHA-2, and SHA-3 hash values online. Support for SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA3-224, SHA3-256, SHA3-384, and SHA3-512.

MD5 Hash Generator

Generate MD5 hash values online for text and files. Create secure 128-bit hash checksums instantly.

Image Slicer

Split images into rows and columns. Perfect for creating social media grids, game sprites, or image mosaics.

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