July 18, 2026
How to remove duplicates in Google Sheets
Remove duplicates in Google Sheets with the built-in tool, UNIQUE, or COUNTIF. What each method deletes, the whitespace trap, and when to work outside Sheets.
Read article →The Sigmera blog
Practical, no-fluff writing on cleaning messy spreadsheet and CRM data — and why it should never leave your browser.
July 14, 2026
What is data cleaning? A practical guide
What is data cleaning? It is fixing duplicates, typos, and bad formatting in a dataset so it is usable. Learn the process and how to do it in your browser.
Read article →July 13, 2026
How to clean a CSV before a CRM import
Clean a CSV before a CRM import the right way — remove duplicates, fix phone numbers and emails, and match name fields, all in your browser.
Read article →June 1, 2026
Why you should never upload your data just to clean it
The privacy and GDPR case for cleaning spreadsheets in your browser instead of on someone else's server.
Read article →June 1, 2026
The data cleaning checklist before any CRM import
Seven checks — duplicates, emails, phones, names — to run on a spreadsheet before importing it to a CRM.
Read article →June 1, 2026
What is E.164 phone number format?
A plain-English explanation of the international phone number standard and why CRMs and SMS tools require it.
Read article →June 1, 2026
How duplicate data quietly wrecks your CRM
Why duplicate rows inflate your numbers and break automations — and how to strip them out before import.
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