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Practical guides for CSV, Excel and JSON. Plain English, real fixes.
How to Convert a Semicolon CSV to Comma-Delimited CSV
European Excel exports often use semicolons instead of commas. Learn how to convert semicolon-delimited CSV files safely.
CSV Sample Files for Testing Parsers and Spreadsheet Imports
Copy small CSV examples for delimiter, quote, encoding, newline, leading-zero and malformed-file test cases.
How to Fix Garbled Characters in a CSV Opened in Excel
If cafe becomes café or smart quotes become strange symbols, your CSV has an encoding mismatch. Here's how to fix it.
What to Do When a Large CSV Will Not Open in Excel
Excel has hard row and column limits. Here are the practical ways to open, split, preview or query a CSV that's too large.
How to Keep Leading Zeros When Opening a CSV in Excel
Excel removes leading zeros from ZIP codes, IDs, SKUs and account numbers. Here are the reliable ways to preserve them.
Extract Phone Numbers from Any Text: 5 Methods Compared
From regex to AI parsers — five practical ways to pull phone numbers out of free-form text, ranked by accuracy, speed and effort.
Flattening Nested JSON for Excel: A Practical Guide
Nested JSON doesn't fit a spreadsheet. Here are four practical strategies for flattening any JSON structure into Excel — with examples.
How to Convert CSV to PDF Without Excel
Three ways to turn a CSV into a clean PDF without installing Excel — including the fastest in-browser method and a free command-line option.
10 Ways to Open CSV Files in 2026
From Excel to the command line — every practical way to open, read or preview a CSV file in 2026, ranked by speed and use case.
Why Your CSV File Shows in One Column (and How to Fix It)
Excel showing your CSV as a single column? It's almost always a delimiter mismatch. Here's exactly how to fix it in under a minute.