🌐

PDF to HTML

Convert PDF text into clean semantic HTML — h1/h2/h3 from font sizes, real lists, escape-safe output. 100% in-browser.

100% LOCALSemantic h1/h2/h3Real listsPage rangeSandboxed preview

Saved Presets· Auto-save on

▾

The CalculatorPage 1

🌐

Drop a PDF here, or click to browse

Text-based PDFs (scanned pages need OCR first)

Full HTML5 document (uncheck for a bare fragment)Generate a linked table of contents from headingsStyle

Pagesto

Drop a text-based PDF and convert it to semantic HTML

Data Source & Legal Disclaimer

Effective: 2026Last updated: 2026-09-08Update: Manual review

Sources: pdfjs-dist text layer

HTML conversion runs entirely in your browser with pdf.js. Your file is never uploaded. Works on PDFs with embedded text — scanned pages need OCR.

See all data sources & update policy →

How it worksPage 2

↩ Back to calculator

Why semantic HTML beats a wall of <div>s

Many "PDF to HTML" converters dump every text fragment into absolutely-positioned <div> wrappers — pixel-faithful but unreadable, unsearchable, and unusable in a CMS. This converter takes the opposite trade: it rebuilds document structure from the text layer. Font height relative to each page's median decides heading level (≥1.6× → h1, ≥1.3× → h2, ≥1.15× → h3, ≤0.75× → italic em), bullet glyphs become real <ul> lists, numbered lines become <ol>, and every fragment is HTML-escaped so stray < or & from the source never breaks your page. The full-document mode wraps everything in a minimal, valid HTML5 skeleton with a small inline stylesheet — ready to publish or paste into any editor.

Text items → lines → size-ratio tags → semantic HTML

The same font-size heuristics as the Markdown converter, mapped to HTML tags.

Migrating a product manual into the CMS — Priya's conversion

Priya maintains a 40-page hardware manual that must live on the company website, and the CMS only accepts HTML.

Convert:She drops the manual; the 14 pt chapter titles land at 1.6× the 9 pt body median and become h1, the 11.5 pt sections become h2, and the parts list renders as a real ol with 86 items
Inspect:The preview shows escaped ampersands from the SKU column (&) — exactly what a raw paste would have corrupted
Choose the mode:She keeps full-document mode: the output includes the viewport meta and a tiny stylesheet, so opening the file directly looks presentable for review
Publish:manual.html downloads and the CMS import preserves every heading for the auto-generated table of contents

↩ Back to converter

FAQ & detailsPage 3

↩ Back to calculator

To convert a PDF to HTML: load the file and choose a full document or a bare fragment — headings and lists are detected from font size and bullet glyphs.

FreeToolHub PDF to HTML is a free browser-based tool that converts PDF text into semantic HTML with headings and lists detected, no signup, no upload.

About this tool

What is this tool?

Convert PDF to clean semantic HTML online free. Headings, lists, and paragraphs are rebuilt from font-size heuristics with full HTML5 document or bare fragment output. Download the .html file. 100% browser-based - no upload, no signup, no watermarks.

Semantic h1/h2/h3Real listsPage rangeSandboxed preview

Rebuilding Structure From a Flat Glyph Stream

PDFs store positioned glyphs with no concept of heading, paragraph, or list; HTML needs exactly those semantics. The converter clusters characters into visual lines by baseline, computes each line size against the page median, and maps the ratios: at least 1.6x becomes h1, 1.3x becomes h2, 1.15x becomes h3, and 0.75x or smaller renders as italic footnotes. Bullet glyphs map to ul items and numbered lines to ol items, with consecutive items grouped into single list elements so the HTML does not degrade into one-item lists.

Built for CMS Imports and Code Review

The most common destination for converted HTML is a content management system, and two properties matter there: validity and diffability. The full-document mode emits exactly one valid HTML5 skeleton with escaped text throughout, so a stray angle bracket from the PDF cannot break the page. Fragment mode gives you pure body elements for pasting into existing templates. Either way the markup is small enough to read — no inline styles per fragment, no positioned divs, no hidden tracking spans that other converters leave behind.

Limits You Should Know Before Converting

Text-based PDFs convert cleanly: reports, specs, and papers become structured HTML with real headings. Scanned pages carry no text layer and yield empty sections — run the PDF OCR tool first, then convert. Complex multi-column layouts can interleave columns in reading order, so compare any two-column page against the original. Tables convert as paragraphs rather than HTML tables, because PDF tables carry no structural markup — the gridlines are visual, not data. For image-heavy layouts where fidelity beats structure, a page-image approach like PDF to PPT preserves the look exactly.

Frequently Asked Questions

Is the HTML output clean or full of positioned divs?

Clean and semantic. Instead of dumping absolutely-positioned fragments, the converter rebuilds document structure: font-size ratios become h1/h2/h3 headings, bullet glyphs become real ul lists, numbered lines become ol lists, and everything else becomes paragraphs. The output is a file you can publish, paste into a CMS, or diff in code review.

What is the difference between full-document and fragment mode?

Full-document mode wraps the converted content in a valid HTML5 skeleton: doctype, viewport meta, title from the file name, and a small inline stylesheet so the file looks presentable opened directly in a browser. Fragment mode outputs just the body elements — ideal for pasting into an existing template or a CMS rich-text field.

Is my text safe from HTML injection issues?

Yes. Every text fragment is HTML-escaped before output: angle brackets, ampersands, and quotes from the PDF become <, &, and " entities. A contract full of <TBD> placeholders or R&D references will not break the generated page.

Can I convert only part of a long PDF?

Yes — set the page range before converting. Chapter 3 to 5 of a manual, or just the pages you need for a blog post. The progress counter reflects the range, and page-break markers carry data-page attributes so you can see where each source page begins.

Where does the conversion run — is my document uploaded?

Everything runs in your browser using the pdf.js text layer and local conversion logic. The PDF never leaves your device, making the tool safe for contracts, internal documents, and anything confidential.