Want to batch convert CSV files to HTML files?
Try Withdata Data File Converter, a desktop CSV to HTML converter for Windows, MacOS, and Linux, Bulk convert CSV to HTML, 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 CSV file(s) to online services.
- Support Windows, Linux, and macOS.
Download Withdata DataFileConverter 
Batch convert CSV files to HTML tables
Select source CSV files -> Set HTML files -> Convert CSV files to HTML tables
Click “Start a New Convert” at task dialog.
then show the wizard.
Select From “Files” “CSV” To “Files” “Html”.
1. Select source CSV files.
And config the first source CSV file.
2. Config target HTML files.
3. Summary.
List source CSV files.
4. Convert CSV files to HTML tables.
After converting, you can view output HTML tables.
More about CSV to HTML converter
Download Withdata DataFileConverter
See also:
CSV → HTML reference
Type mapping
| Value kind | in CSV | in HTML |
|---|---|---|
| Int | 1234 | <td>1234</td> |
| Bigint | 9007199254740993 | <td>9007199254740993</td> |
| Decimal | 1234.56 | <td>1234.56</td> |
| Float | 1.234e+10 | <td>1.234e+10</td> |
| Text | quoted only when it contains a comma or a quote | <td>text</td> |
| Long text | must be quoted; line breaks inside force multi-line records | <td>multi-line text</td> (entities for & <) |
| Date | 2026-09-18 | <td>2026-09-18</td> |
| Datetime | 2026-09-18 14:30:00 | <td>2026-09-18 14:30:00</td> |
| Binary | not representable - base64 or hex string | not representable in a cell |
| Boolean | TRUE / FALSE, or 1 / 0 depending on the writer | <td>true</td> |
| JSON | the whole JSON value quoted, with internal quotes doubled | <td>{"a":1}</td> (quotes escaped) |
Dialect differences
Both CSV and HTML are file formats, so what differs below is how each one chooses to represent a value.
| Property | in CSV | in HTML |
|---|---|---|
| identifiers | Double quotes; a literal quote is doubled ("" ) | Attribute values in quotes; entities for reserved characters |
| dates | Conventional text: 2026-09-18 or 2026-09-18 14:30:00 | Whatever text was rendered |
| binary | Not supported | data: URIs inside src attributes |
| separator | Comma "," | Tags, not delimiters |
| encoding | No declaration - UTF-8 works only with a BOM | Declared in a meta charset tag or the HTTP header |
| typing | None - every field is text | None |
| shape | Flat table, optional header row | Free form; tables are row/column structures inside markup |
| ceiling | No formal limit; row count bounded by memory | No formal limit |
Data File Converter without the manual work
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