What happens to Excel formulas when I convert to CSV?

Formulas convert to their current calculated values. The formula =SUM(A1:A10) becomes 42 (or whatever the result is). CSV is plain text and cannot store formulas — only the computed result is preserved.

What about Excel formatting, colors, and charts?

All formatting is discarded. CSV stores only the raw cell values. Charts and images are lost entirely. Only the visible data in cells is preserved — which is exactly what data tools need.

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Convert XLSX to CSV — Export Clean Data for Every Tool

Q: What delimiter does the CSV use?

Standard comma (,) delimiter. Some countries use semicolons (;) as the standard CSV separator. If your data contains commas within cells, those cells are automatically quoted to prevent parsing errors.

Q: Is this converter free?

Yes — 100% free, no account, no upload. All processing runs entirely in your browser. Your spreadsheet data is never sent to any server.

CSV is the lingua franca of data. When you need to import data into a database, feed it to Python/pandas, upload it to Shopify or Mailchimp, or process it with any programming language — CSV is what they all expect. Excel (.xlsx) is for humans; CSV is for machines. Converting strips all the formatting, formulas, and styling to leave pure, clean tabular data that every tool can read.

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Converting XLSX to CSV takes three steps: open the Convertlo XLSX to CSV converter, add your XLSX file, then download the converted CSV. Works entirely in your browser — your files never leave your device.

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From Excel to Every Tool: Why Data Lives in CSV

Excel's power — formulas, pivot tables, conditional formatting — is also its limitation. Every tool outside the Microsoft ecosystem struggles with XLSX. Python's pandas library reads CSV in one line. MySQL and PostgreSQL import CSV directly. Shopify's product import requires CSV. Mailchimp's contact list upload is CSV. When your data needs to leave Excel and go somewhere useful, CSV is the bridge.

🐍 Python pandas, R — every programming language reads CSV natively with a single function call
🗄️ Database imports — MySQL, PostgreSQL, and SQLite all use CSV for bulk data loading
🛒 E-commerce platforms — Shopify, WooCommerce, and BigCommerce import products via CSV
📧 Email marketing tools — Mailchimp, Klaviyo, and ConvertKit import contacts as CSV
🔀 Version control — Git can diff CSV files line-by-line, unlike binary XLSX
📦 Smaller file size — a 2 MB XLSX often becomes a 50 KB CSV with the same data

How to Convert XLSX to CSV

Open the Converter

Click "Convert Now" — opens with XLSX → CSV pre-selected on the Document tab.

Upload Your XLSX

Drag and drop your Excel file or click Browse. Works with .xlsx and .xls files.

Convert in Browser

All processing runs in your browser — formulas resolve to values, formatting is stripped.

Download CSV

Your CSV file downloads instantly, ready to import into any tool or data platform.

XLSX vs CSV — Format Comparison

XLSX (Microsoft Excel Spreadsheet (.xlsx)) and CSV (Comma-Separated Values) use different compression and storage methods. The table below shows the key technical differences. XLSX supports up to 1,048,576 rows and 16,384 columns per sheet. CSV is the universal data interchange format — use it to move data between systems.

Property	XLSX	CSV
Compatibility	Microsoft Excel, Google Sheets, LibreOffice Calc	Universal — every programming language, database, spreadsheet
Best for	Financial data, calculations, charts, pivot tables	Data import/export, database interchange, simple datasets
Editable	Yes — full formulas, charts, pivot tables	Yes — any text editor
Layout preserved	Yes — formulas, formatting, charts all preserved	No — data only, no formulas or formatting

Features

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100% Private

Your spreadsheet never leaves your browser — zero server uploads.

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Formulas → Values

All Excel formulas resolve to their computed results in the CSV output.

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Free

No account, no watermarks, no row limits. Unlimited conversions.

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Batch Convert

Convert multiple XLSX files to CSV at once — each produces its own CSV output.

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UTF-8 Encoded

Output CSV is UTF-8 encoded — handles accents, emoji, and international characters.

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Mobile-Friendly

Works on any device — phone, tablet, or desktop browser.

Key Questions About XLSX to CSV, Answered

Direct answers structured for AI extraction, voice search, and featured snippets.

What happens to Excel formulas, formatting, and charts when converting to CSV?

Formulas convert to their current calculated values — a cell showing =SUM(A1:A10) becomes 42 (or whatever the result is), since CSV is plain text and cannot store formulas. All formatting, colors, and charts are discarded; CSV stores only the raw cell values, which is exactly what most data tools need.

Formulas: only the computed result is preserved, not the formula itself
Formatting and colors: removed entirely — CSV has no styling
Charts and images: lost completely, not converted to text or images

If my Excel file has multiple sheets, what gets exported?

Only the active (first) sheet converts to CSV. To export all sheets, convert each sheet separately by making it active before exporting. Name your sheets clearly before converting so you know which CSV matches which sheet.

Active sheet only: the currently selected tab is what exports
Multiple sheets: repeat the conversion once per sheet
Naming: clear sheet names help you track which CSV is which

Does CSV preserve dates correctly?

Dates may convert as Excel serial numbers (e.g., 45678) or in a locale-specific format depending on how Excel stored them internally. If dates look wrong in the CSV, re-check your Excel date format settings and ensure dates are formatted as Date cells (not Text) before converting.

Serial numbers: a date showing as a 5-digit number means it wasn't formatted as a Date cell
Locale formats: date order (MM/DD/YYYY vs DD/MM/YYYY) depends on Excel's regional settings

What delimiter does the CSV use, and can I import it into Google Sheets?

The output uses a standard comma (,) delimiter, though some countries use semicolons (;) as the standard CSV separator. If your data contains commas within cells, those cells are automatically quoted to prevent parsing errors. To import into Google Sheets, go to File → Import → Upload → choose your CSV — Google Sheets handles UTF-8 encoded CSV well, including emoji, accented characters, and currency symbols.

Comma delimiter: cells containing commas are auto-quoted per the CSV standard
Semicolon regions: some locales expect ; as the separator instead
Google Sheets: File → Import → Upload handles UTF-8 CSV correctly
Privacy: 100% free, no account, no upload — processing runs in your browser

Go Deeper: XLSX to CSV Resources

In-depth articles to help you understand the formats, pick the right settings, and get the best results.

📖Excel to CSV: Export Spreadsheet Data the Right Way

Frequently Asked Questions

Formulas convert to their current calculated values. The formula =SUM(A1:A10) becomes the numeric result (e.g., 42). CSV is plain text and cannot store formulas — only the computed result is exported. This is usually exactly what data tools need: raw numbers, not spreadsheet logic.

All formatting is discarded. CSV stores only the raw cell values — no colors, bold text, cell borders, or conditional formatting. Charts and embedded images are lost entirely. Only the visible data in cells is preserved, which is what databases and programming tools actually need.

Only the active (first) sheet converts to CSV. To export all sheets, convert each sheet separately by making it active before exporting. Name your sheets descriptively before converting so you know which CSV corresponds to which sheet of data.

Dates may convert as Excel serial numbers (e.g., 45678) or in a locale-specific format depending on how Excel stored them internally. If dates look wrong in the CSV, check that your Excel date cells are formatted as Date type (not Text or General) before converting. Python's pandas library can parse most date formats with pd.to_datetime().

Standard comma (,) delimiter — the universal default. Some countries and tools use semicolons (;) as the separator. If your data contains commas within cells (e.g., addresses or product descriptions), those cells are automatically quoted to prevent parsing errors in downstream tools.

Yes. In Google Sheets go to File → Import → Upload → choose your CSV file. Google Sheets handles UTF-8 encoded CSV well. Emoji, accented characters (é, ñ, ü), and special currency symbols (€, £, ¥) should all transfer correctly without becoming garbled.

Yes — 100% free, no account needed, no upload. All processing runs entirely in your browser. Your spreadsheet data is never sent to any server — important for business data, client lists, and financial figures.