XLSX to XLS converter
Turn your XLSX into a clean, ready-to-use XLS in a couple of clicks – no software to install, nothing to sign up for.
Convert XLSX to XLS
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
Free to try with no account and no watermark
Batch several XLSX files in a single conversion
How it works
Convert XLSX to XLS in 3 steps
Upload or drag in your XLSX file
Choose your output options if you need them
Download the finished XLS
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 XLSX to XLS?+
Upload your XLSX file (or drag it onto the box above), wait a few seconds while StandardsPDF converts it in your browser, then download the XLS. There is nothing to install and no account required.
Is converting XLSX to XLS free?+
Yes. XLSX to XLS 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 XLS keep the quality of my XLSX?+
StandardsPDF aims for the highest fidelity the XLS format allows, so your spreadsheet comes through looking as close to the original as possible. Some format-specific details may adapt where XLS works differently to XLSX.
Are formulas kept when I convert XLSX to XLS?+
Cell values, rows and columns from your XLSX are always preserved. Live formulas carry into the XLS when it supports them, otherwise they become their calculated values.
Do I need to install anything to convert XLSX to XLS?+
No. Converting XLSX to XLS runs entirely in the browser – no desktop software, no extensions and no account for the free tier.
What is the maximum XLSX file size I can convert to XLS?+
Up to 100 MB per XLSX on the free tier and 2 GB on Pro. If your XLSX is larger, split it first or upgrade for the higher limit.
Can I convert several XLSX files to XLS at once?+
Yes – add multiple XLSX files and StandardsPDF processes them as a batch, returning a XLS for each.
Can I convert XLSX to XLS on my phone?+
Yes – the XLSX to XLS converter is fully responsive and works in Safari, Chrome and other modern browsers on iOS, Android and iPadOS.