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
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.
Delimiter flexibility for every system
The default comma works for most cases, but semicolons, tabs, and pipe characters are also valid. Choosing the right delimiter prevents misaligned columns when your data already contains commas.
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.
API integration for automated pipelines
The API endpoint accepts XLSX files and returns CSV in real-time, making it straightforward to automate conversions inside an ETL job, data pipeline, or any application that processes spreadsheet files at scale.
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.
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
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
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
Automating exports through the API
An engineer builds an ETL pipeline that receives XLSX files from a vendor system and converts them to CSV automatically using the API, enabling ingestion into a data warehouse without manual steps.
5
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.
Advanced encryption for all API transfers
API requests use TLS with advanced encryption in transit. Files sent via the API are processed in secure data centers and deleted immediately after the CSV response is delivered.
No account, no tracking, no logging
This tool requires no login or account creation. No file names, metadata, or usage patterns tied to your identity are recorded at any point during the conversion process.
Parcourir par catégorie
Choisissez parmi notre large gamme d'outils en ligne gratuits
Outils PDF
Tous vos besoins PDF en un seul endroit
- Fusionner PDF
- Organiser PDF
- Diviser PDF
- Compresser PDF
- Convertir en Word
- Convertir en image
View All
Outils Image
Modifiez et optimisez vos images
- Redimensionner l'image
- Compresser l'image
- Convertir le format
- Recadrer l'image
- Ajouter un filigrane
- Supprimer l'arrière-plan
View All
Outils Word
Travaillez avec des documents Word
- Convertir en PDF
- Fusionner des documents
- Diviser des documents
- Compresser le fichier
- Modifier le texte
- Ajouter un filigrane
View All
Outils Excel
Traitez les feuilles de calcul Excel
- Convertir en PDF
- Convertir en CSV
- Fusionner des feuilles
- Diviser des feuilles
- Compresser le fichier
- Nettoyer les données
View All
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.
Outils Excel et documents associés
D'autres outils gratuits pour travailler avec vos feuilles de calcul et fichiers.