Is it safe to convert XLSX to CSV online?

Yes! Convert999 processes all files directly in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

How long does it take to convert XLSX to CSV?

Conversion is nearly instant for most files. Large files may take a few seconds depending on your device's processing power.

Is there a file size limit?

Convert999 supports files up to 2GB. Processing happens locally, so larger files depend on your device's available memory.

Do I need to install any software?

No installation required. Convert999 works entirely in your web browser on any device.

Free · No Upload · Instant

Converti XLSX in CSV Online — Gratis e Veloce

Convertitore online gratuito da XLSX a CSV. Converti i tuoi file Microsoft Excel in formato Comma-Separated Values istantaneamente.

Scegli File

o trascina e rilascia i file qui

Dimensione max: 2GB

I tuoi file vengono elaborati localmente nel browser. Nulla viene caricato su alcun server.

Come Convertire XLSX in CSV

Carica il tuo file XLSX cliccando "Scegli File" o trascinando.

Seleziona CSV come formato di output.

Clicca "Converti Ora" e scarica il file convertito.

Info sul Formato XLSX

Extension: .xlsx
Full name: Microsoft Excel

Info sul Formato CSV

Extension: .csv
Full name: Comma-Separated Values

Domande Frequenti

È sicuro convertire XLSX in CSV online?

Sì! Convert999 elabora tutti i file direttamente nel tuo browser.

Quanto tempo ci vuole per convertire XLSX in CSV?

La conversione è quasi istantanea per la maggior parte dei file.

C'è un limite di dimensione del file?

Convert999 supporta file fino a 2GB.

Devo installare un software?

Nessuna installazione necessaria.

Can I convert XLSX to CSV on my phone?

Yes! Convert999 works on any device with a web browser — iPhone, Android, iPad, or desktop. No app installation required. Simply open the converter, upload your XLSX file, and download the converted CSV file.

Will I lose quality converting XLSX to CSV?

Convert999 uses high-quality conversion algorithms to minimize quality loss. For lossless formats, the conversion is exact. For lossy formats like images and audio, we use optimized settings that balance quality and file size.

Can I batch convert multiple XLSX files to CSV?

Yes, Convert999 supports batch conversion. Select or drag & drop multiple XLSX files and convert them all to CSV format at once. Each file is processed locally in your browser.

What is the difference between XLSX and CSV?

Microsoft Excel (XLSX) and Comma-Separated Values (CSV) differ in compression, compatibility, and features. XLSX is optimized for its native use cases, while CSV may offer different advantages. Visit our XLSX vs CSV comparison page for a detailed breakdown.

Why Convert XLSX to CSV?

Advantages

✓Comma-Separated Values offers better compatibility with modern applications and workflows
✓Converting is completely free with no file size limits on Convert999
✓Your files never leave your device — 100% private and secure conversion
✓Instant conversion without waiting for server processing

Key Differences

→XLSX (Microsoft Excel) is optimized for its native use cases
→CSV (Comma-Separated Values) may offer different compression or feature set
→Choose based on your target platform, quality needs, and file size requirements

Conversioni Correlate

XLSXXLS XLSXODS XLSXCSV XLSXTSV XLSXNUMBERS XLSXXLSM XLSCSV XLSXCSV ODSCSV TSVCSV NUMBERSCSV XLSMCSV

Explore More

.xlsx

XLSX Converter

All XLSX conversions

.csv

CSV Converter

All CSV conversions

XLSX vs CSV

Compare formats

Convert to CSV

All sources → CSV