Spreadsheet

Free browser spreadsheet tools to convert CSV and XLSX without uploading business data to a server.

Conversions

Spreadsheet Converter

Convert table formats

Supported Formats

About Spreadsheet Tools

Spreadsheet tools focus on clean tabular conversions. Move data between CSV and XLSX, prepare exports for analysis, and keep formulas where the destination allows. Everything runs locally so financial sheets never leave your machine.

Best for

  • CSV ↔ Excel handoffs for analysts
  • Cleaning exports before BI import
  • Sharing sheet data without desktop Office
  • Converting tables for cross-app workflows

Pros

  • +Local processing for sensitive sheet data
  • +Fast CSV and XLSX conversions
  • +No subscription lock-in
  • +Works in any modern browser

Cons

  • −CSV cannot store formulas or charts
  • −Complex Excel macros are not executed
  • −Very large workbooks need device memory

How to use Spreadsheet tools

  1. 1

    Pick the Spreadsheet tool you need from the list below — every tool runs locally in your browser.

  2. 2

    Upload your file(s) from your PC, Mac or mobile device, or simply drag and drop them onto the page. You can add more files to process them together.

  3. 3

    Use the gear icon to specify codec, quality, aspect ratio or other settings and apply them to all files if you want.

  4. 4

    Click Convert to start the process. When the conversion finishes, download the result or save it back to Google Drive / Dropbox.

Frequently Asked Questions

Are spreadsheet tools free?
Yes. Convert common sheet formats free without an account.
Is my data uploaded?
No. Files are processed in your browser only.
Are formulas preserved?
XLSX flows keep formulas when supported. CSV exports store values only.
Can I convert CSV to Excel?
Yes. Import CSV and download an XLSX workbook.
What about charts?
Plain CSV cannot retain chart objects; Excel paths vary.
Is there a row limit?
No artificial cap — huge sheets are bound by browser memory.
Do I need Excel installed?
No. Convert in the browser, open results in Excel or Sheets later.
Is batch conversion available?
Where supported, process multiple tabular files in one session.
FREE

100% Free

No hidden fees, no subscriptions, and no limits. Enjoy complete access to all features gratis.

SIGNUP

No Signup Required

Start converting immediately without creating an account or sharing email address.

PRIVACY

Private & Secure

Your files never leave your device. All processing is completed locally for maximum privacy.

BATCH

Batch Conversion

Convert multiple files simultaneously to save time. Fast and efficient multi-file queue.

LOCAL

Runs in Browser

Utilizes advanced client-side WebAssembly technology to process files directly inside your tab.

FORMATS

200+ Formats

Supports a wide variety of formats including images, documents, audio, video, and more.

USER REVIEWS

Spreadsheet Quality Rating

4.8
25 reviews

How was your experience? You need to convert and download at least one file to provide feedback!