Excel Errors· 8 min read
Excel IFERROR Formula Examples: When to Use It and When Not To
Learn Excel IFERROR formula examples for VLOOKUP, XLOOKUP, division, blanks, dashboards, and reports. Includes when not to use IFERROR.
Read article →Blog
Excel Tips & Guides
Practical advice on fixing Excel errors, auditing spreadsheets, and building workbooks that don't break.
How-To· 8 min read
How to Combine Two Columns in Excel
Combine two columns in Excel using &, CONCAT, CONCATENATE, TEXTJOIN, Flash Fill, and Power Query. Includes spaces, commas, names, and blank-cell handling.
Read article →Excel Errors· 8 min read
Excel SUMIF Formula Not Working: Why It Returns 0 or the Wrong Total
Fix an Excel SUMIF formula not working because of text numbers, wrong criteria, mismatched ranges, dates, spaces, wildcards, or hidden data.
Read article →Data Cleaning· 8 min read
How to Remove Spaces in Excel
Remove spaces in Excel using TRIM, CLEAN, SUBSTITUTE, Find and Replace, Power Query, and formulas for leading, trailing, extra, and non-breaking spaces.
Read article →How-To· 8 min read
How to Lock Cells in Excel Without Breaking Your Spreadsheet
Learn how to lock cells in Excel, protect formulas, allow editing in input cells, and avoid the most common worksheet protection mistakes.
Read article →Formulas· 10 min read
Excel IF Statement Examples: 15 Practical Formulas You Can Copy
Practical Excel IF statement examples for numbers, text, dates, blanks, nested logic, AND/OR conditions, and common formula mistakes.
Read article →How-To· 9 min read
How to Create a Drop Down List in Excel
Create an Excel drop down list using Data Validation, a named range, another sheet, or a dynamic list. Includes fixes for common dropdown problems.
Read article →CSV· 7 min read
CSV Delimiter Guide: Comma vs Semicolon vs Tab
Learn which CSV delimiter to use for Excel exports, why semicolon CSV files happen, and how to convert Excel to comma, semicolon, tab, or pipe-delimited CSV.
Read article →Audit· 8 min read
How to Audit an Excel File Before Sending It
A practical pre-send Excel audit checklist for formula errors, hidden sheets, broken links, hardcoded values, duplicates, and file size issues.
Read article →Troubleshooting· 7 min read
Excel Filter Not Showing All Rows? Causes and Fixes
Fix Excel filters that miss rows because of blank rows, broken table ranges, hidden rows, merged cells, or data outside the filter range.
Read article →Duplicates· 7 min read
How to Find Case-Sensitive Duplicates in Excel
Find duplicates in Excel where case matters, such as SKU codes, usernames, IDs, and system exports. Includes formulas and a free duplicate finder workflow.
Read article →CSV Fixes· 8 min read
How to Keep Leading Zeros in CSV Files When Opening in Excel
Learn why Excel removes leading zeros from CSV files and how to preserve ZIP codes, product IDs, account numbers, and SKUs correctly.
Read article →Troubleshooting· 8 min read
Excel Sort Not Working? 7 Fixes for Dates, Numbers, and Mixed Rows
Excel sort not working correctly? Fix mixed data types, blank rows, merged cells, partial selections, dates stored as text, and header problems.
Read article →Duplicates· 8 min read
How to Find Duplicate Values in Two Columns in Excel
Find duplicate values across two Excel columns using COUNTIF, conditional formatting, formulas, and a free duplicate finder tool.
Read article →Comparison· 8 min read
How to Compare Two Excel Sheets for Differences
Compare two Excel sheets for changed, added, and removed values using formulas, conditional formatting, View Side by Side, or a free compare tool.
Read article →Performance· 8 min read
Excel File Too Large to Email? How to Reduce It Fast
Excel file too large to email? Learn why XLSX files become huge and how to shrink them by fixing used range, formatting, images, hidden sheets, and blank rows.
Read article →How-To· 8 min read
How to Convert CSV to Excel — The Complete Guide
Why double-clicking a CSV file goes wrong and how to import it correctly. Covers the Text Import Wizard, Power Query, and a free browser tool — plus fixes for common problems.
Read article →How-To· 7 min read
How to Merge Multiple Excel Files Into One — 4 Methods
Combine multiple Excel workbooks into one file using copy-paste, Power Query, VBA, or a free browser tool. Covers stacking rows and combining sheets.
Read article →Performance· 10 min read
Excel File Too Large? 8 Ways to Reduce Its Size
Why Excel files balloon in size and 8 proven methods to shrink them — from removing unused rows to stripping formatting and compressing with a free tool.
Read article →How-To· 6 min read
How to Split an Excel File by Column Value — 3 Methods
Split one Excel sheet into multiple sheets or files based on a column value — by region, department, product category, or any grouping. VBA, manual filter, and free tool.
Read article →How-To· 5 min read
How to Convert Excel to JSON — 3 Methods
Convert Excel spreadsheets to JSON format using Python, Node.js, or a free browser tool. First row becomes object keys — output is ready for APIs and web apps.
Read article →How-To· 7 min read
How to Sort Excel by Multiple Columns Without Breaking Rows
Learn how to sort Excel data by two or more columns safely, avoid mixed-up rows, and use a free browser tool for quick clean sorting.
Read article →How-To· 6 min read
How to Find and Replace Across an Entire Excel Workbook
Replace text, numbers, labels, and codes across one sheet or a whole Excel workbook safely, with a checklist to avoid accidental replacements.
Read article →Data Cleaning· 6 min read
How to Extract Unique Values in Excel
Four practical ways to extract unique values in Excel using UNIQUE, Advanced Filter, Remove Duplicates, and a free browser tool.
Read article →Analysis· 6 min read
How to Calculate Column Statistics in Excel
Calculate count, sum, average, minimum, maximum, missing values, and numeric summaries for Excel columns with formulas or a free browser tool.
Read article →Conversion· 6 min read
How to Convert Excel to XML for Data Imports
Learn when Excel to XML conversion is useful, how XML maps work, and how to create a clean XML export from spreadsheet rows.
Read article →How-To· 6 min read
How to Transpose Excel Data from Rows to Columns
Rotate Excel data from rows to columns using Paste Special, TRANSPOSE, Power Query, or a free browser tool.
Read article →Data Cleaning· 6 min read
How to Remove Blank Rows in Excel Without Deleting Real Data
Remove blank rows from Excel safely using filters, Go To Special, Power Query, or a free browser tool that preserves your data.
Read article →Best Practices· 8 min read
Excel Data Cleaning Checklist Before Sharing or Importing a File
A practical Excel data cleaning checklist covering blanks, duplicates, formulas, sorting, formatting, unique values, and file conversion.
Read article →How-To· 8 min read
How to Convert Excel to CSV — 4 Methods Compared
Four ways to save an Excel spreadsheet as CSV — from the built-in Save As to Python and a free browser tool. Covers encoding, date formatting, and multi-sheet files.
Read article →How-To· 5 min read
How to Freeze Rows and Columns in Excel (and Unfreeze Them)
Step-by-step guide to freezing the top row, first column, or multiple rows and columns — so headers stay visible while scrolling. Plus fixes for common freeze pane problems.
Read article →Excel Errors· 8 min read
COUNTIF Not Working in Excel? 5 Reasons and How to Fix Them
COUNTIF returning 0, wrong counts, or an error? The five most common causes — data type mismatches, missing quotes, wildcard errors, spaces — with copy-paste fixes.
Read article →Troubleshooting· 7 min read
Excel Date Format Not Working? Here Is Why and How to Fix It
Dates showing as numbers, wrong year, or refusing to format? Every Excel date problem has a specific cause. This guide explains the five most common with step-by-step fixes.
Read article →How-To· 8 min read
How to Remove Duplicates in Excel — 4 Methods for Every Situation
Step-by-step guide to removing duplicate rows using the built-in tool, UNIQUE formula, conditional formatting, and Power Query — including which method to use when.
Read article →Excel Errors· 7 min read
Excel #VALUE! Error: What Causes It and How to Fix It
The #VALUE! error appears when Excel receives the wrong data type in a formula. Learn the 6 most common causes — text in maths, date mismatches, wrong arguments — with exact fixes.
Read article →Performance· 9 min read
Excel Running Slow? 9 Ways to Speed Up a Sluggish Spreadsheet
Slow Excel files are caused by specific, fixable problems. Volatile functions, excessive conditional formatting, full-column references — here is how to fix each one.
Read article →How-To· 8 min read
How to Compare Two Excel Files for Differences
Four methods to compare two Excel spreadsheets — from built-in View Side by Side to formula-based difference finders and conditional formatting highlights.
Read article →Excel Errors· 7 min read
SUMIF Not Working in Excel? 6 Causes and Exact Fixes
SUMIF returning 0, a wrong total, or an error? These are the six most common reasons — text-formatted numbers, wildcard mistakes, range size mismatches — with copy-paste fixes.
Read article →Troubleshooting· 7 min read
Numbers Stored as Text in Excel: How to Find and Fix Every Instance
Numbers stored as text look normal but break SUM, AVERAGE, and VLOOKUP silently. Learn how to identify them with 3 detection methods and convert them in bulk.
Read article →Excel Errors· 8 min read
Excel #NAME? Error: Every Cause and How to Fix It
The #NAME? error means Excel does not recognise something in your formula. Here are all 7 causes — misspelled functions, undefined names, missing quotes — with exact fixes for each.
Read article →Best Practices· 8 min read
10 Excel Best Practices Every Professional Should Follow
The habits that separate error-prone spreadsheets from reliable ones. Ten rules used by financial modellers and data analysts to build workbooks that stay accurate over time.
Read article →Excel Errors· 7 min read
Excel Circular Reference: What It Is, How to Find It, and How to Fix It
A circular reference means a formula depends on its own result — causing infinite loops or zero values. Learn how to find every circular reference in your workbook and resolve it.
Read article →How-To· 5 min read
How to Unhide Sheets in Excel — Including Very Hidden Sheets
Standard hidden sheets are easy to reveal, but "Very Hidden" sheets (xlSheetVeryHidden) cannot be found through the right-click menu. Here is how to find and unhide both.
Read article →Troubleshooting· 8 min read
Excel Formula Not Calculating? 6 Causes and How to Fix Them
Your formula is there but the result never updates. Here are the six most common reasons Excel formulas stop calculating — and the exact steps to fix each one.
Read article →Excel Errors· 9 min read
VLOOKUP Not Working? 7 Reasons and Exactly How to Fix Each One
VLOOKUP returning #N/A, the wrong value, or an error? This guide covers every common cause — from data type mismatches to extra spaces — with copy-paste fixes for each.
Read article →Excel Errors· 8 min read
Why Your Excel Totals Are Wrong: Silent Errors That Break Spreadsheets
Numbers that look right but are secretly wrong. Learn the hidden Excel errors — text-formatted numbers, overwritten formulas, and broken links — that silently corrupt your totals.
Read article →Best Practices· 9 min read
How to Audit an Excel Spreadsheet: A Complete Checklist
A step-by-step auditing process used by financial analysts and data teams to catch errors before they cause real problems.
Read article →Excel Errors· 8 min read
Excel Formula Errors Explained: #REF!, #VALUE!, #DIV/0! and How to Fix Them
A plain-English guide to every Excel formula error — what causes each one, how to find them quickly, and step-by-step fixes you can apply right now.
Read article →Ready to audit your spreadsheet?
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