CSV to HTML Table

No. Your CSV is never sent to our servers - all parsing, conversion to HTML, escaping, styling, copy, and download happen directly in your browser on your device using JavaScript. The only network request the tool ever makes is the one you trigger explicitly with URL Import, which goes from your browser to the URL you enter.

Five: comma, tab, semicolon, pipe, and colon. The Delimiter dropdown lets you pick one explicitly, or leave it on Auto so the tool inspects the first line of your CSV and picks the most likely separator. You can always override the choice manually if Auto guesses wrong on an unusual file.

When Delimiter is set to Auto, the tool counts how many times each candidate delimiter (comma, tab, semicolon, pipe, colon) appears on the first line of your CSV and picks the most frequent one. For tricky files where the first line contains URLs or timestamps, switch the dropdown to the correct delimiter manually.

Yes. Toggle the Include CSS checkbox in the output toolbar and the tool prepends a <style> block to the generated HTML containing your styling settings. Pick from six theme presets (None, Minimal, Striped, Bordered, Modern, Dark) or set theme to None and use the Custom Styling Options panel to control header and body colors, border style, width, color, cell padding, text alignment, collapse mode, and striped rows. The result is fully self-contained - paste it anywhere and it looks styled.

Bootstrap adds the classes 'table table-bordered table-hover' to the <table> tag so it inherits the look of an existing Bootstrap project. Tailwind adds 'min-w-full divide-y divide-gray-200' so it fits a Tailwind project. If you also fill in the CSS Class field, your custom class is appended after the framework classes. Pick None if you want only your own classes.

No. Cells are inserted exactly as written in your CSV, with the four HTML special characters (& < > ") escaped to their entity equivalents so the table renders safely even if your data contains markup. Whitespace inside cells is preserved. Short rows are padded with empty cells to match the widest row so the resulting table is rectangular.

The tool is optimized for big files. The full HTML output is always generated and available via Copy and Download, but the on-screen displays are capped: the HTML code preview is limited to the first 500 lines and the live HTML table preview is limited to the first 100 rows. This keeps the page responsive even on multi-megabyte CSVs - converting a 46,000-row CSV stays smooth instead of freezing the tab.

Yes - that is exactly what the Include CSS toggle is for. Email clients usually strip external stylesheets, so enable Include CSS, pick a theme preset (or define custom styling), and the generated output will be a self-contained block of HTML with all styles inlined in a <style> tag at the top. Paste it into your newsletter HTML and the table will render correctly.

Your settings (delimiter, header row, table ID, CSS class, caption, framework, theme, minify, include CSS, striped rows, responsive wrapper) are saved to your browser's localStorage under the key "csv-to-html-table-data" and restored on the next visit. Your CSV input and generated HTML output are not saved - this keeps the tool fast even when you work with very large files. Re-upload or re-paste your CSV after a refresh.

Supports comma, tab, semicolon, pipe, and colon delimiters. When Delimiter is set to Auto, the tool inspects the first line of your CSV and picks the most frequent candidate, so a comma file, a tab-separated TSV, a European semicolon CSV, a pipe-separated PSV, or a colon-separated text file all work without manual configuration. You can always override the choice manually from the Delimiter dropdown if Auto guesses wrong.

Four ways to load CSV data: type or paste straight into the textarea, click Upload to pick a .csv / .tsv / .txt file, drag a file onto the Input area, or click URL Import to reveal a URL field that calls fetch() directly from your browser to the target endpoint with no proxy. URL Import requires the target server to allow cross-origin requests via CORS headers.

When Header row is on (default), the first row of your CSV is wrapped in <thead><tr><th>...</th></tr></thead> for proper semantic markup, accessibility, and screen reader navigation. When off, the first row becomes a regular <tbody><tr><td>...</td></tr> like every other row, and no <thead> is emitted.

If your CSV has ragged rows (some rows shorter than others), the tool calculates the maximum column count across all rows and pads every shorter row with empty cells to match. The resulting HTML table is always rectangular - no missing <td> cells, no broken layouts when CSS borders meet uneven row widths.

Every cell is passed through an escapeHtml step that converts the four HTML special characters (& < > ") into their entity equivalents (&amp; &lt; &gt; &quot;) before being inserted into the table. This means your CSV can safely contain HTML tags, ampersands, comparison operators, and quotation marks - they will display literally in the rendered table instead of being interpreted as markup.

Add a custom id and class attribute to the <table> tag from the output toolbar. The Table ID lets you target the table from JavaScript with document.getElementById() or from CSS with #id selectors. The CSS Class hooks the table into your existing stylesheet and is appended after any framework classes you also enable.

Add an optional <caption> element to the table for accessibility and SEO. The caption appears above the table in screen readers and search engine indexing, describes the table's content, and is the recommended way to label data tables per WCAG and HTML5 best practices. Leave the field blank to omit the caption tag entirely.

Pick the framework that matches your project from the Framework dropdown. Bootstrap adds 'table table-bordered table-hover' classes for an instant Bootstrap look. Tailwind adds 'min-w-full divide-y divide-gray-200' classes for an instant Tailwind look. Pick None to skip framework classes entirely. Your custom CSS Class is appended after the framework classes if both are set.

Choose from six pre-designed themes (None, Minimal, Striped, Bordered, Modern, Dark) when Include CSS is enabled. Minimal is clean with subtle bottom borders. Striped alternates row backgrounds. Bordered adds full grid lines. Modern uses an indigo header with rounded corners and a hover effect. Dark uses a dark gray palette suitable for dark websites and emails. Each theme generates a complete CSS block that inlines into the output - no external stylesheet needed.

When Include CSS is on and Theme is set to None, expand the Custom Styling Options panel to control header background and text color, body background and text color, border style (solid, dotted, dashed, double, groove, ridge, none), border width and color, cell padding, text alignment (left, center, right), border-collapse mode, and striped rows. The settings are written into the inlined <style> block when you click Convert to HTML.

When Include CSS is enabled, a <style> block is prepended to the generated HTML containing either your selected theme's CSS or your custom styling settings. This makes the output fully self-contained - paste it into any environment (email, plain HTML file, CMS that strips external stylesheets) and the table will look styled. Disable Include CSS for cases where your page already provides table styling.

Toggle Minify in the output toolbar to strip all whitespace and line breaks from the generated HTML. The result is a single line of HTML that is significantly smaller, useful for production templates, email HTML where every byte counts, and JavaScript template literals where pretty-printing only adds noise.

Enable Responsive to wrap the generated table in a <div style="overflow-x:auto"> container. On narrow viewports the wrapper becomes horizontally scrollable instead of letting the table push the page wider than the screen. This is the recommended technique for embedding wide data tables in mobile-friendly pages.

Below the code output, the tool renders a live preview of the generated table so you can see exactly how it will look before copying or downloading. For very large CSVs the preview is limited to the first 100 data rows so the browser does not have to lay out millions of DOM nodes - a notice next to the Preview label tells you how many rows the full table actually has. Copy and Download always operate on the full untruncated output.

The output panel shows the generated HTML in a read-only text area so you can read and inspect the markup. For huge CSVs the displayed code is limited to the first 500 lines and a notice next to the Output label tells you the preview is limited. Copy and Download always work on the full output - the cap is purely a display safeguard to keep the page responsive when the generated HTML is megabytes long.

Click Copy HTML to copy the entire generated output to your clipboard via navigator.clipboard.writeText(). The button label briefly changes to "Copied!" for 1.5 seconds as confirmation, then reverts. Works for both pretty-printed and minified output.

Click Download HTML to save the output as a complete standalone HTML file (table.html) with a proper <!DOCTYPE>, <html>, <head>, and <body> wrapper plus default table styling so it opens correctly in any browser by double-clicking. If Include CSS is already enabled, the default styling is skipped to avoid duplication. The blob is created locally on your device and the temporary object URL is released after the download is triggered.

Every setting you configure (delimiter, header row, table ID, CSS class, caption, framework, theme, minify, include CSS, striped rows, responsive wrapper) is saved to your browser's localStorage under the key "csv-to-html-table-data" and restored on the next visit. Your CSV input and generated HTML output are intentionally not saved - they can be very large, and persisting them on every keystroke would slow the tool down. Re-upload or re-paste your CSV after a refresh.

Click Clear to wipe the input textarea, the generated output, and both live previews in a single action. Your saved settings are kept so you do not have to reconfigure the dialect, theme, framework, or toggles when starting a new conversion.