CSV to XLSX converter
Turn your CSV into a clean, ready-to-use XLSX in a couple of clicks – no software to install, nothing to sign up for.
Convert CSV to XLSX
Drop your files to try StandardsPDF. This tool is available in the full workspace.
Keeps rows, columns and cell values intact
Retains number formats so totals still read correctly
Files auto-deleted from our servers within 60 minutes
Works in any modern browser – desktop, tablet or phone
How it works
Convert CSV to XLSX in 3 steps
Upload or drag in your CSV file
Choose your output options if you need them
Download the finished XLSX
Private by default
Files are encrypted in transit and deleted within 60 minutes.
Fast
Most jobs finish in under 10 seconds. No queueing.
No signup on free tier
5 documents per day, no credit card required.
FAQ
Frequently asked questions
How do I convert CSV to XLSX?+
Upload your CSV file (or drag it onto the box above), wait a few seconds while StandardsPDF converts it in your browser, then download the XLSX. There is nothing to install and no account required.
Is converting CSV to XLSX free?+
Yes. CSV to XLSX conversion is free on the StandardsPDF free tier – no watermark, no signup, and no credit card. A Pro tier lifts the file-size and daily limits if you need more.
Will the XLSX keep the quality of my CSV?+
StandardsPDF aims for the highest fidelity the XLSX format allows, so your spreadsheet comes through looking as close to the original as possible. Some format-specific details may adapt where XLSX works differently to CSV.
Are formulas kept when I convert CSV to XLSX?+
Cell values, rows and columns from your CSV are always preserved. Live formulas carry into the XLSX when it supports them, otherwise they become their calculated values.
What is the maximum CSV file size I can convert to XLSX?+
Up to 100 MB per CSV on the free tier and 2 GB on Pro. If your CSV is larger, split it first or upgrade for the higher limit.
Can I convert several CSV files to XLSX at once?+
Yes – add multiple CSV files and StandardsPDF processes them as a batch, returning a XLSX for each.
Can I convert CSV to XLSX on my phone?+
Yes – the CSV to XLSX converter is fully responsive and works in Safari, Chrome and other modern browsers on iOS, Android and iPadOS.
How long does a CSV to XLSX conversion take?+
Most CSV files convert to XLSX in a few seconds. Larger or higher-resolution files take a little longer, but there is never a queue on the free tier.