WUCJ BLOG · V1.2.1

Practical guides that makeeveryday work easier.

Now with 16 practical topics in English, with matching Traditional Chinese pages.

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LATEST GUIDES

Latest practical guides

Useful explanations first, tools second—so you know what to do before you click.

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ALL ARTICLES

All guides

16 topics available in this language.

Excel

How to Remove Duplicate Rows in Excel Without Deleting the Wrong Data

A practical Excel deduplication workflow covering comparison columns, backups, verification, and repeatable cleanup.

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Excel

Excel vs CSV: What Changes When You Export Data?

Understand the differences between XLSX and CSV, including formulas, formatting, encoding, worksheets, and system compatibility.

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Excel

How to Split Text Into Columns in Excel: Names, Addresses, and IDs

Practical ways to split text in Excel using delimiters, fixed width, formulas, and browser-based tools.

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Excel

Why Excel Dates Go Wrong: Text Dates, Serial Values, and Calendar Conversion

A guide to Excel date problems involving text values, serial dates, imports, and calendar conversion.

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Image

How to Compress Images Without Making Them Look Blurry

Balance image quality, dimensions, format, and file size for websites, sharing, and general use.

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Image

What Image Size Should You Use on a Website?

Practical website image sizing guidance covering display width, high-density screens, aspect ratio, and performance.

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Image

How to Convert Multiple Images to PDF Without Losing the Page Order

Organize JPG and PNG files before converting to PDF, including page order, A4 layout, orientation, and file size.

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PDF

How to Split a Long PDF: Page Ranges, Naming, and Verification

A reliable PDF splitting workflow for reports, contracts, scans, and long documents.

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PDF

How to Rotate, Delete, and Reorder PDF Pages After Scanning

A practical workflow for fixing rotated pages, blank pages, and page order in scanned PDFs.

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PDF

Why Is My PDF So Large? Find the Real Cause Before Compressing

Understand why PDFs become large, including high-resolution scans, images, fonts, and unnecessary pages.

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Barcode

How Large Should a Barcode Label Be? Size, Quiet Zone, and Print Quality

Practical considerations for barcode and QR Code size, quiet zones, print resolution, label material, and scanner testing.

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Barcode

Creating a QR Code for a URL: 5 Things to Check Before Printing

Avoid broken or hard-to-scan URL QR Codes by checking HTTPS, link length, size, quiet zone, and real-device testing.

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Excel

How to Remove Blank Rows in Excel: 3 Practical Methods

Three practical ways to remove blank rows from Excel or CSV data, including filtering, locating blanks, and a browser-based cleanup tool.

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Image

JPG vs PNG vs WebP: Which Image Format Should You Use?

A practical comparison of JPG, PNG, and WebP for photos, transparency, website performance, and file size.

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PDF

How to Merge PDF Files Without Installing Software

A simple PDF merge workflow covering file order, privacy checks, verification, and repeatable document organization.

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Barcode

QR Code vs Barcode: When to Use Code 128 or Code 39

Compare QR Codes, one-dimensional barcodes, Code 128, and Code 39 for links, warehouse labels, and internal identifiers.

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