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Convertir Excel en CSV

or drag & drop here

Supports .xlsx, .xls, .ods

Convertissez vos feuilles de calcul Excel en fichiers CSV propres et portables en un clic. Rapide, privé et complètement gratuit — aucun logiciel requis.

  • Multi-feuilles
  • Sans inscription
  • Dans le navigateur
  • Toujours gratuit
3 étapes simples

Comment convertir Excel en CSV

Exportez vos données de feuilles de calcul en fichiers CSV en moins d'une minute.

01

Téléversez votre feuille de calcul

Glissez-déposez votre fichier .xlsx ou .xls sur la page, ou cliquez pour le sélectionner depuis votre appareil.

02

Conversion automatique

Notre outil lit instantanément chaque feuille de votre classeur et convertit chacune en un fichier CSV séparé.

03

Téléchargez votre CSV

Téléchargez le CSV de chaque feuille individuellement. Si votre classeur n'a qu'une feuille, un seul fichier est prêt en un clic.

About

What is a CSV converter?

A CSV converter transforms tabular data from a spreadsheet format — such as XLS or XLSX — into comma-separated values format, a plain text output that every database, programming language, and data tool can read. For anyone moving Excel data across systems, a reliable converter removes the manual step that slows every workflow down.

For best results, verify your source file has consistent column headers and no merged cells before converting. This ensures the CSV output maps correctly to your target system the first time.

Plain text, universal compatibility

CSV carries no proprietary encoding, so it works with Python, SQL, R, Google Sheets, and virtually every other tool that handles tabular data without requiring additional drivers or libraries.

Smaller file size than XLS or XLSX

CSV drops Excel-specific markup, styles, and metadata, resulting in significantly smaller files that are faster to transfer, easier to store, and simpler to manage in a version control system.

Correct quoting for tricky values

Cells that contain commas, double quotes or line breaks are wrapped in quotes and escaped, so a value like New York, NY stays in one column instead of splitting into two.

Formula results are written as values

The converter writes the evaluated result of each formula into the CSV output, not the formula string itself. Downstream scripts receive clean numeric or text values with no dependency on the Excel engine.

Multi-sheet workbooks handled

A workbook with several tabs produces one CSV per sheet, each named after its tab, so every sheet arrives as a separate file ready for import.

Handles files from any source application

XLS files from older Microsoft Office versions, modern XLSX files, and ODS files from LibreOffice all convert cleanly. Output format and encoding stay consistent regardless of which application created the source file.

Benefits

Why convert Excel to CSV?

CSV is the format that databases, APIs, and analytics platforms actually expect. Converting your Excel files to CSV removes the compatibility layer that slows down every import, integration, and automated pipeline that touches spreadsheet data.

1

Database imports need CSV, not XLSX

Most SQL databases, cloud data warehouses, and ETL tools accept CSV natively. Starting with a CSV file removes the extra conversion step that XLSX imports almost always require.

2

Smaller size improves transfer speed

CSV files carry only raw values and delimiters. Stripping Excel formatting dramatically reduces file size, cutting transfer time for large datasets shared over APIs or slow connections.

3

Version control works well with CSV

Git and similar tools show meaningful diffs for plain text files. Storing CSV instead of binary XLS makes changes reviewable and reversible in any standard code repository.

4

Scripts parse CSV without extra libraries

Python, Node.js, and R all include CSV readers in their standard libraries. Reading an XLSX file requires installing and maintaining additional dependencies that CSV simply does not need.

5

Cross-platform reading is guaranteed

Any operating system opens a CSV file with a plain text editor. XLSX files need Excel or a compatible viewer — CSV has no such requirement and works everywhere without configuration.

6

Compression keeps archive sizes minimal

CSV compresses extremely well with gzip or zip because repeated text patterns reduce efficiently. Archiving large datasets as compressed CSV can reduce long-term storage costs significantly.

Use cases

Who uses an Excel to CSV converter?

Real situations where converting XLS or XLSX files to CSV solves a direct, practical problem without workarounds.

Developer

Loading data into a SQL database

A backend developer receives monthly reports as XLSX files and needs to import them into PostgreSQL. Converting to CSV first makes the database COPY command work without any additional parsing code.

1
Analyst

Feeding Excel data into Python scripts

A data analyst uses pandas to process spreadsheet exports from a CRM. Converting XLSX to CSV removes the openpyxl dependency and makes the script run faster on files with hundreds of thousands of rows.

2
Finance

Uploading records to accounting software

An accountant needs to import transactions from an Excel spreadsheet into accounting software that only accepts CSV. The converter handles the file in seconds with no manual reformatting required.

3
Marketing

Importing contacts into a CRM platform

A marketing coordinator has a contact list in XLSX format and needs to upload it to HubSpot or Salesforce. Both platforms require CSV for bulk import, making conversion a necessary first step every time.

4
Data

Loading vendor reports into a warehouse

An engineer receives XLSX reports from a supplier every week. Converting each sheet to CSV gives files that bulk-import tools and SQL COPY commands load without extra drivers.

5
Education

Sharing student data across platforms

A school administrator exports grade data from one system as XLSX and needs to import it into another that only reads CSV. The converter handles the format change without altering any values.

6
Compare

CSV vs XLSX — which to use?

Both formats have a clear role. The right choice depends on what you need to do with the data after you have it.

VS
Recommended for transfer

CSV format

  • Works with every database, API, and analytics tool without extra libraries or proprietary drivers installed.
  • Plain text makes the file readable in any editor and produces meaningful diffs in version control systems.
  • Smaller file size after stripping formatting means faster uploads and lower storage costs at scale.
Best for authoring

XLSX format

  • Stores multiple sheets, formulas, charts, and cell formatting that CSV format cannot represent at all.
  • Native format for Microsoft Excel and spreadsheet software used across most office environments today.
  • Preserves cell-level data types — dates, currencies, percentages — without ambiguity or inference required.

Use XLSX while building and editing. Convert to CSV when data needs to move to another system. Keep both — the XLSX as the source of record, the CSV as the transfer format.

Privacy

Your files stay private and secure

Processed entirely in your browser

Conversion runs in JavaScript on your own device. Your Excel file is never uploaded to any server, so there is no transmission risk even for sensitive or proprietary data.

No data stored after you download

Once you download your CSV file, the in-memory copy is cleared immediately. Nothing is written to disk on our end — your file exists only in your browser's memory during conversion.

Nothing is sent over the network

Your browser reads the file straight from your device. No part of the spreadsheet is transmitted, so there is no upload to secure and no server copy to delete.

No account and no file logging

This tool needs no login or account, and the names and contents of your files are never recorded.

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Pourquoi nous choisir

La façon la plus intelligente de convertir Excel en CSV

Un outil rapide et privé basé sur le navigateur qui gère tout — des feuilles individuelles aux classeurs multi-onglets complexes.

Prise en charge multi-feuilles

Chaque feuille de votre classeur est convertie en son propre fichier CSV séparé, gardant vos données parfaitement organisées.

100 % privé

Vos feuilles de calcul sont entièrement traitées dans votre navigateur. Pas un seul octet de vos données n'est envoyé à nos serveurs.

Ultra rapide

Pas de files serveur ni de délais de téléversement. La conversion s'effectue instantanément grâce à la puissance de traitement de votre appareil.

Fonctionne partout

Utilisez-le sur n'importe quel navigateur moderne sous Windows, Mac, Linux, iOS ou Android — pas d'extensions ni d'installation requises.

Sortie CSV propre

Les lignes, colonnes et caractères spéciaux sont gérés correctement et exportés au format CSV standard UTF-8.

Toujours gratuit

Pas d'abonnements, pas de filigranes, pas de limites d'utilisation. Convertissez autant de fichiers Excel que nécessaire à coût zéro.

✓ Sans inscription✓ Sans filigrane✓ Sans limite de fichiers✓ Basé sur le navigateur✓ Fichiers en local
FAQ

Questions fréquentes – Excel vers CSV

Questions courantes sur la conversion de fichiers Excel au format CSV.

L'outil prend en charge .xlsx (Excel 2007+), .xls (ancien format Excel) et .ods (feuille de calcul OpenDocument). Vous pouvez téléverser l'un de ces types de fichiers et ils seront convertis en CSV.

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