Batch convert HTML files to CSV files

Shiji Pan

1 year ago

Want to batch convert HTML files to CSV files?

Try Withdata Data File Converter, a desktop HTML to CSV converter for Windows, MacOS, and Linux, Batch convert HTML to CSV, Easy and Fast.

Can run in GUI mode, Step by Step, just a few mouse clicks.
Can run in Command line, for Scheduled Tasks and Streams.
Convert files locally and privately, avoid uploading large HTML file(s) to online services.
Support Windows, Linux, and macOS.

Click “Start a New Convert” at task dialog.

then show the wizard.

Select From “Files” “HTML” To “Files” “CSV”.

And config the first source HTML file.

List source HTML files.

After converting, you can view output CSV files.

HTML → CSV reference

Value kind	in HTML	in CSV
Int	`<td>1234</td>`	`1234`
Bigint	`<td>9007199254740993</td>`	`9007199254740993`
Decimal	`<td>1234.56</td>`	`1234.56`
Float	`<td>1.234e+10</td>`	`1.234e+10`
Text	`<td>text</td>`	`quoted only when it contains a comma or a quote`
Long text	`<td>multi-line text</td> (entities for & <)`	`must be quoted; line breaks inside force multi-line records`
Date	`<td>2026-09-18</td>`	`2026-09-18`
Datetime	`<td>2026-09-18 14:30:00</td>`	`2026-09-18 14:30:00`
Binary	`not representable in a cell`	`not representable - base64 or hex string`
Boolean	`<td>true</td>`	`TRUE / FALSE, or 1 / 0 depending on the writer`
JSON	`<td>{"a":1}</td> (quotes escaped)`	`the whole JSON value quoted, with internal quotes doubled`

Both HTML and CSV are file formats, so what differs below is how each one chooses to represent a value.

Property	in HTML	in CSV
identifiers	`Attribute values in quotes; entities for reserved characters`	`Double quotes; a literal quote is doubled ("" )`
dates	`Whatever text was rendered`	`Conventional text: 2026-09-18 or 2026-09-18 14:30:00`
binary	`data: URIs inside src attributes`	`Not supported`
separator	`Tags, not delimiters`	`Comma ","`
encoding	`Declared in a meta charset tag or the HTTP header`	`No declaration - UTF-8 works only with a BOM`
typing	`None`	`None - every field is text`
shape	`Free form; tables are row/column structures inside markup`	`Flat table, optional header row`
ceiling	`No formal limit`	`No formal limit; row count bounded by memory`

For batch jobs, large files and scheduling use the Data File Converter converter — an offline desktop app for Windows, Linux and macOS. Free trial.