Is my HTML data saved on a server?

No, it is not saved. This tool performs all parsing and data extraction locally in your browser using JavaScript. Since no data is sent to a server, you can safely use it even with confidential information.

What happens if there are multiple tables in the HTML?

The tool automatically detects all tags in the provided HTML source code and extracts them into separate result boxes. You can copy the data from each table individually.

Does it support merged cells (rowspan / colspan)?

Yes, it fully supports them. It correctly interprets HTML spanning attributes and expands them appropriately into a matrix (2D array) before converting to your desired format, ensuring no data goes missing or gets misaligned.

Can it extract data from broken or incomplete HTML?

Since we use the browser's built-in HTML parser (DOMParser), minor syntax errors that browsers can tolerate are automatically corrected and parsed. However, if the structure is completely broken, it may not be read correctly.

The extracted CSV shows garbled text when opened in Excel.

Excel sometimes fails to correctly display UTF-8 encoded CSV files. You can solve this by importing the data via Excel's 'Data' tab using 'From Text/CSV', or by opening the file in a text editor and saving it as UTF-8 with BOM.

🧮

html table extractor,

HTML Table Extractor

Instantly extract table data from HTML code
and convert it to CSV or Markdown.

🔄

Multiple Formats

CSV / TSV / Markdown / JSON

🧩

Merged Cells Supported

Accurately processes rowspan / colspan

🔒

100% Secure & Local

No data is sent to any server

HTML Source Code

Output Format

CSV

TSV

Markdown

JSON

Markdown TOC Generator

✅

JSON Schema Validator

👾

8-bit SFX Generator

about,

About HTML Table Extractor

The HTML Table Extractor is a free web tool that automatically parses HTML source code to identify and extract data from <table> tags. It is an excellent utility for cleaning up scraped HTML content or extracting tabular data from legacy HTML files to convert them into standard formats suitable for spreadsheet applications.

The tool supports exporting data into CSV, TSV, Markdown, and JSON formats, offering flexibility based on your specific needs. Since all processing is performed entirely within your web browser, any confidential data or personally identifiable information remains completely secure and is never sent to an external server.

howto,

How to Use

STEP 1

Paste HTML Code

Paste the HTML source code containing the table you want to extract into the input area. You can paste the entire source code of a web page or just the table snippet.

STEP 2

Select Output Format

Choose your desired output format: CSV, TSV, Markdown, or JSON. CSV is ideal for opening in Excel, while Markdown is great for pasting into documentation.

STEP 3

Extract and Copy

Click the "Extract Tables" button to instantly parse all tables found in the source code. The results will be displayed below, where you can easily copy the extracted data.

glossary,

Glossary

HTML Table (<table>): An HTML element used to represent two-dimensional tabular data on a web page. It is composed of related elements such as <tr> (table rows), <th> (header cells), and <td> (data cells).
CSV (Comma-Separated Values): A simple text format that uses commas (,) to separate data fields. It is universally accepted by spreadsheet applications like Excel and Google Sheets, making it a standard for data migration and import/export tasks.
Markdown Table: A text-based formatting syntax used to create tables. Markdown tables are widely supported by documentation tools such as GitHub, Notion, and Zenn, making it extremely convenient for developers writing technical docs.
DOM (Document Object Model): A programming interface for HTML and XML documents. This tool utilizes the browser's native DOMParser API to safely and accurately analyze the inputted HTML string without relying on fragile regular expressions.
Rowspan / Colspan: HTML attributes used to merge cells vertically (rowspan) or horizontally (colspan) within a table. This extractor accurately interprets these attributes and properly expands the merged cells into a 2D matrix to maintain data integrity during conversion.

faq,

Frequently Asked Questions

Q.Is my HTML data saved on a server?: No, it is not saved. This tool performs all parsing and data extraction locally in your browser using JavaScript. Since no data is sent to a server, you can safely use it even with confidential information.
Q.What happens if there are multiple tables in the HTML?: The tool automatically detects all <table> tags in the provided HTML source code and extracts them into separate result boxes. You can copy the data from each table individually.
Q.Does it support merged cells (rowspan / colspan)?: Yes, it fully supports them. It correctly interprets HTML spanning attributes and expands them appropriately into a matrix (2D array) before converting to your desired format, ensuring no data goes missing or gets misaligned.
Q.Can it extract data from broken or incomplete HTML?: Since we use the browser's built-in HTML parser (DOMParser), minor syntax errors that browsers can tolerate are automatically corrected and parsed. However, if the structure is completely broken, it may not be read correctly.
Q.The extracted CSV shows garbled text when opened in Excel.: Excel sometimes fails to correctly display UTF-8 encoded CSV files. You can solve this by importing the data via Excel's 'Data' tab using 'From Text/CSV', or by opening the file in a text editor and saving it as UTF-8 with BOM.

use cases,

Use Cases

🔍

Web Scraping Data Cleanup

Easily extract structured table data from raw HTML source code obtained via automated scraping scripts in languages like Python, and save it neatly as CSV.

📝

Writing Markdown Documentation

Quickly convert existing specification tables on web pages into Markdown format to paste directly into GitHub readmes or Notion documents.

📊

Data Analysis Preparation

Extract data embedded in complex, nested HTML tables as JSON or TSV to accelerate your data analysis pipeline using BI tools or spreadsheets.

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Legacy System Migration

Streamline the process of parsing HTML reports generated by old systems to create intermediate CSV data for importing into modern databases.

technology,

Technical Details

High-Precision Parsing with DOMParser

To accurately interpret the flexible and sometimes ambiguous structure of HTML, this tool utilizes the browser-native DOMParser rather than relying on regular expressions. This ensures precision equivalent to a browser's rendering engine, easily handling nested tables and complex attributes that regex cannot.

Furthermore, to eliminate security risks such as XSS (Cross-Site Scripting), the parsing is performed safely without executing any embedded scripts, and data is carefully extracted via the textContent property.