Excel XLS to HTML Converter
Excel XLS rows are normalised by tabular-ir before HTML is written, preserving row order and typed values for xls-to-html.
Free without signing in: 10 server conversions per day, 10 MB each. Browser-only conversions stay on this device and do not count against server limits.
Supported formats
.xls → .html, .htm
Conversion engine
tabular-ir
10 free today · See pricing →
Pair-specific
Features & use cases
Features
- Excel XLS rows are normalised by tabular-ir before HTML is written, preserving row order and typed values for xls-to-html.
- Flat XLS columns stay flat in HTML; presentation-only details are not carried forward.
- Workbook formulas, merges, comments, charts, widths, and cell styling are discarded; sheet selection controls which tab is read.
- Numbers, booleans, dates, blanks, and strings are inferred and then serialized in the destination format's native shape.
Use cases
- Prepare XLS files for tools that expect HTML.
- Create reviewable samples for support tickets, tests, and data handoffs.
- Batch recurring file chores while keeping warnings attached to each output.
- Normalize partner or archive files without installing desktop conversion software.
See real results
Original
Orders.xlsx
| Order ID | Customer | Total | Paid | Ship date |
|---|---|---|---|---|
| 1001 | Northwind Ops | 1294.50 | TRUE | 2026-09-03 |
| 1002 | Atlas Finance | 488.75 | FALSE | 2026-09-04 |
| 1003 | Studio Blue | 73.10 | TRUE | 2026-09-05 |
Converted
Pretty preview
Order ID,Customer,Total,Paid,Ship date 1001,Northwind Ops,1294.5,true,2026-09-03 1002,Atlas Finance,488.75,false,2026-09-04 1003,Studio Blue,73.1,true,2026-09-05
What actually changes
Options
Worksheet
Read a named worksheet from XLSX, XLS, or ODS input.
Header row index
Pick the zero-based row that supplies workbook column names.
Date handling
Read spreadsheet dates as typed dates or literal strings.
Example
Excel XLS sample fileHTML output with converted structureDo it in code
import pandas as pd
df = pd.read_excel("input.xls")
df.to_html("output.html", index=False)FAQ
Can I convert XLS to HTML in the browser?
Yes. Enabled tabular-ir conversions run in a browser worker, so regular web conversions do not upload your file.
Will spreadsheet formulas and styling survive?
No. The tabular engine preserves the visible table values and inferred types, not formulas, charts, merged cells, comments, or styling.
How are nested records handled?
Nested JSON, YAML, and XML objects become flattened columns. Arrays can remain JSON strings or expand into indexed columns.
Can I choose a workbook sheet?
Yes. Use the sheet option for XLSX, XLS, or ODS input; single-table outputs write that one sheet.
Is the HTML schema guaranteed?
Column names and scalar types are inferred from the input. Review warnings for ragged rows, nested fields, and unsupported destination features.
Everything you need
Browser-first privacy
CSV, JSON, XML, YAML, XLSX, and table conversions run locally when the source and target formats support it.
Warnings, not surprises
Formula drops, flattened arrays, sheet selection, and layout changes are surfaced as conversion warnings.
Batch and zip
Queue multiple files, download individual results, or package them into a zip for handoff.
API, CLI, MCP
Convert from browsers, scripts, automations, and AI assistants with the same warnings and outputs.
Team workspaces
Shared history, API keys, limits, and retention settings keep production conversions controlled.
Retention you control
Browser files never upload; server inputs auto-delete within 24 hours and outputs follow workspace retention.
Comparison
Why teams switch
Where data files are processed
FileTypeConverters: CSV, JSON, YAML, XML, and spreadsheet files can convert in your browser.
Upload-only converters: Most tools upload every file to their servers first.
What you learn about fidelity
FileTypeConverters: Warnings call out flattened arrays, dropped formulas, selected sheets, and layout changes.
Upload-only converters: Downloaded files often arrive with no explanation of what changed.
Batch + zip
FileTypeConverters: Batch files and download individual results or one zip.
Upload-only converters: Batching is often paid-only or missing.
API, CLI, and MCP
FileTypeConverters: Use the web app, automation, or an AI assistant with the same conversion behavior.
Upload-only converters: Many converters are web-form only.
Retention control
FileTypeConverters: Browser files never upload; server inputs are deleted within 24 hours.
Upload-only converters: Retention is usually unclear or not configurable.
Price
FileTypeConverters: Start with free browser conversion and clear paid limits.
Upload-only converters: Limits are often hidden behind upload steps or subscriptions.
Choose your plan
Starter
POPULAR$8.99/mo
For regular conversion work
2-day trial for paid plans
- 500 conversions/mo
- 100 MB max file
- API + MCP