Convertidor de XLSX a XLS
Free XLSX to XLS converter online: upload a file, get the result and prepare data for catalogs, price lists and integrations.
Converter XLSX → XLS
Upload a XLSX file and get XLS online. Simple files work immediately, while advanced structure rules, filters and automation can be saved in your account.
¿Necesitas transformaciones, no solo cambiar el formato?
Regístrate si necesitas cambiar valores en celdas, redimensionar y convertir imágenes, o filtrar la exportación solo por los elementos necesarios.
What is a XLSX to XLS converter
A XLSX to XLS converter reads data in one format and builds output in another structure. It is useful when a supplier, CMS, ERP, marketplace or internal system expects a different file from the one you have. For simple files Eofferix can move fields automatically. In production workflows, rules matter: which fields are kept, how columns or tags are named, how nested data is handled, how empty values are normalized and which records are excluded.
When you need it
When data exists in one format but the next system expects another format or structure.
What Eofferix does
The service reads the source, detects repeated records and builds output with clear fields.
Why rules matter
The same file can be exported as a flat table, XML nodes, JSON structure or a feed.
XLSX to XLS example
This simple example shows the basic conversion. After signup, fields, filters, order and recurring runs can be configured.
Before
XLSX| Categoría | Imágenes | Nombre | Precio | SKU | Stock |
|---|---|---|---|---|---|
| Smartphones | ["front.jpg","back.jpg"] | iPhone 15 | 999 | SKU-001 | 12 |
| Smartphones | ["s24.jpg"] | Samsung S24 | 899 | SKU-002 | 8 |
After
XLS| Categoría | Imágenes | Nombre | Precio | SKU | Stock |
|---|---|---|---|---|---|
| Smartphones | ["front.jpg","back.jpg"] | iPhone 15 | 999 | SKU-001 | 12 |
| Smartphones | ["s24.jpg"] | Samsung S24 | 899 | SKU-002 | 8 |
A profile can save mapping, filters, value transformations and result delivery.
After signup and profile setup
configured output| SKU | Nombre | Precio | Stock | Categoría | URLs de imágenes |
|---|---|---|---|---|---|
| SKU-001 | iPhone 15 | 999 | 12 | Smartphones | https://example.com/front.jpg | https://example.com/back.jpg |
| SKU-002 | Samsung S24 | 899 | 8 | Smartphones | https://example.com/s24.jpg |
When you need a XLSX to XLS converter
These conversions are commonly used for catalogs, price lists, stock data, partner exchange and files prepared for receiving-system requirements.
Supplier catalogs
Bring supplier files to the structure expected by a site, CMS, ERP or PIM.
Price lists and stock
Prepare prices, availability, SKUs and categories for import or checks.
Marketplaces and channels
Build files for channel requirements, required fields and stable IDs.
Internal integrations
Move data between systems that use different exchange formats.
Manual review
Get a readable structure for managers, analysts or content teams.
Recurring exports
Run the same scenario repeatedly without manual setup.
Common XLSX to XLS conversion mistakes
Errors usually come from nesting, mixed value types, empty fields and receiver requirements.
Repeated node not selected
Define which records become rows, objects, nodes or offers.
Lost nesting
Arrays and nested objects need a rule: keep, split or move separately.
Different fields
If records have different fields, decide how empty values are handled.
Types not normalized
Prices, dates, true/false and HTML should be normalized.
No filters
Without filters, inactive products or extra categories may be exported.
No validation
Before recurring runs, check preview, encoding and required fields.
XLSX to XLS online or manual conversion
A one-time check and production exchange need different approaches.
| Method | Pros | Cons |
|---|---|---|
| Manual code | Maximum flexibility for unique schemas. | Requires developer time, tests and maintenance. |
| Script | Fast for repeated technical tasks. | Harder to control files, logs, permissions, schedule and delivery. |
| Eofferix | Preview, profiles, rules, files up to 2 GB and scheduled runs. | Complex structures need a saved profile. |
Limits, safety and recurring workflows
Eofferix creates a separate output and does not change the source file. For large catalogs and exact rules, use a saved profile.
Up to 5 MB without signup
Good for quick checks of simple files.
Up to 2 GB after signup
Large catalogs are processed in the account with saved rules.
Source stays unchanged
Output is created as a separate file.
Structure control
When supplier data changes, update only affected rules.
Value transformations
Normalize text, prices, empty values and fields.
Result delivery
Email, FTP/SFTP, webhook and other channels for repeat processes.
Other conversions
Eofferix can also help with adjacent formats for catalogs, price lists and supplier exports.
XLSX → XML
Adjacent format for checking structure and preparing data.
XLSX → JSON
Adjacent format for checking structure and preparing data.
XLSX → CSV
Adjacent format for checking structure and preparing data.
XLSX → YML
Adjacent format for checking structure and preparing data.
XLS → XLSX
Reverse conversion for validation and integrations.
How to convert XLSX to XLS
Upload a file
Drop the file on the page or choose it from your computer.
Check the result
Eofferix reads the structure, shows a preview and prepares the selected format.
Download or save a profile
Download the file or sign up to save rules for repeat runs.
What the XLSX to XLS converter supports
What the XLSX to XLS converter supports
Small files can be checked directly on the page, while production rules are saved in a profile.
Field mapping
Rename fields, choose order, hide unnecessary values and match receiver requirements.
Nested data
Arrays, objects, repeated nodes and tables can be processed with clear rules.
Export filters
Export only required products, categories, stock records or rows.
Preview
Check structure before downloading the file or saving a processing profile.
Automation
After signup, profiles can run manually, on schedule or with result delivery.
XLSX to XLS FAQ
Convert XLSX to XLS and automate repeat tasks
Start by checking a file, then save a profile for recurring catalog, price-list and stock processing.
Probar gratis → Up to 5 MB without signup · up to 2 GB after signup · no software install