Convert PDF, Office, data, and markup files into clean, self-contained HTML — for humans and for LLMs.

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Project description

everythingtohtml

Convert (almost) any file into clean, self-contained HTML — a universal file reader for your browser and scripts.

English | 中文 | ▶ Live demo — drag a file, read it as HTML

everythingtohtml is the spiritual inverse of tools like markitdown: instead of flattening rich documents down to Markdown, it lifts a wide range of formats up into clean, styled, standalone HTML you can open in a browser, embed in a page, or feed to a workflow that wants structured markup.

One small API. One CLI. A pluggable converter registry. No browser, no network required for local files.

中文简介：everythingtohtml 是一个浏览器里的万能文件阅读器，也是一个 Python 包和 CLI。它可以把 PDF、Office、Markdown、CSV、JSON、EPUB 等常见文件转换成干净、自包含的 HTML，方便直接阅读、分享和自动化处理。

from everythingtohtml import EverythingToHtml

eth = EverythingToHtml()
result = eth.convert("quarterly-report.docx")
print(result.html)        # a complete <!DOCTYPE html> document
print(result.title)       # best-effort document title

$ everythingtohtml notes.md -o notes.html
$ everythingtohtml data.csv > data.html
$ everythingtohtml https://example.com/feed.rss > feed.html

Why HTML (and not Markdown)?

Markdown is lossy: tables get flattened, styling vanishes, slide structure disappears, and nested data becomes ambiguous. HTML keeps the structure that matters — headings, tables, lists, sections, links, images — while staying:

Human-friendly — open the output in any browser, no toolchain needed.
Restyleable — every document ships with a small, overridable stylesheet.
Structure-preserving — explicit <table>/<section> markup keeps tables, sections, and nested content easy to inspect and process.
Self-contained — one file, valid HTML5, dark-mode aware.

Supported formats

Format	Extensions	Extra needed
Plain text	`.txt`, anything textual	— (built in)
Markdown	`.md`, `.markdown`, `.mkd`	— (built in)
HTML (clean/normalize)	`.html`, `.htm`, `.xhtml`	— (built in)
CSV / TSV	`.csv`, `.tsv`	— (built in)
JSON / JSONL	`.json`, `.jsonl`, `.ndjson`	— (built in)
Jupyter notebook	`.ipynb`	— (built in)
RSS / Atom feeds	`.rss`, `.atom`	— (built in)
EPUB e-books	`.epub`	— (built in)
Email	`.eml`	— (built in)
OpenDocument Text	`.odt`	— (built in)
YAML	`.yaml`, `.yml`	`pip install everythingtohtml[yaml]`
reStructuredText	`.rst`	`pip install everythingtohtml[rst]`
Word	`.docx`	`pip install everythingtohtml[docx]`
Word (legacy)	`.doc`	`pip install everythingtohtml[doc]` (LibreOffice recommended)
Excel	`.xlsx`, `.xlsm`	`pip install everythingtohtml[xlsx]`
PowerPoint	`.pptx`	`pip install everythingtohtml[pptx]`
PDF	`.pdf`	`pip install everythingtohtml[pdf]`

Legacy .doc: best results come from having LibreOffice installed (used headlessly for high-fidelity conversion). Without it, a pure-Python olefile fallback recovers the text content.

Markdown math: LaTeX written as $…$ (inline) or $$…$$ (display) renders via MathJax — matrices, \underbrace, \text{…} (including CJK), and more.

Want everything? pip install everythingtohtml[all]

New formats are just a small class away — see Writing a converter.

Installation

# core formats only (tiny dependency footprint)
pip install everythingtohtml

# pull in Office + data formats
pip install "everythingtohtml[all]"

# or cherry-pick
pip install "everythingtohtml[docx,xlsx]"

Requires Python 3.10+.

Usage

Library

from everythingtohtml import EverythingToHtml

eth = EverythingToHtml()

# From a path
result = eth.convert("slides.pptx")

# From bytes or an open stream
with open("data.csv", "rb") as f:
    result = eth.convert(f)

# From a URL (http/https/file/data URIs)
result = eth.convert("https://example.com/posts.atom")

# Give hints when the source is ambiguous (e.g. stdin)
from everythingtohtml import StreamInfo
result = eth.convert(raw_bytes, stream_info=StreamInfo(extension=".md"))

result.html          # the full HTML document (str)
result.title         # detected title, or None
result.text_content  # alias for .html (drop-in for markdown-style code)

Command line

everythingtohtml SOURCE [-o OUTPUT] [--extension .md] [--mimetype text/markdown]

# convert a file to a file
everythingtohtml report.docx -o report.html

# pipe through stdin (give it a hint)
cat notes.md | everythingtohtml --extension .md > notes.html

# fetch and convert a remote feed
everythingtohtml https://hnrss.org/frontpage > hn.html

The CLI is also available as e2h for the impatient.

Merging and comparing documents

Need to collate a stack of Word files into one page, or see exactly what changed between two revisions? everythingtohtml does both — for any supported format.

eth = EverythingToHtml()

# Merge several documents into one HTML page (each becomes a section, with a TOC)
merged = eth.merge(["intro.docx", "chapter1.doc", "appendix.pdf"])

# Place them side by side for visual comparison
columns = eth.merge(["draft-v1.docx", "draft-v2.docx"], layout="columns")

# Produce a highlighted, line-by-line diff of two documents' text
changes = eth.diff("spec-old.docx", "spec-new.docx")
open("changes.html", "w", encoding="utf-8").write(changes.html)

From the CLI:

# two or more sources are merged automatically
everythingtohtml intro.docx chapter1.doc appendix.pdf -o handbook.html

# side-by-side layout
everythingtohtml old.docx new.docx --columns -o compare.html

# highlighted diff of exactly two documents
everythingtohtml spec-old.docx spec-new.docx --diff -o changes.html

Architecture

everythingtohtml borrows the proven shape of markitdown:

EverythingToHtml            # engine: detection + dispatch + plugins
 ├─ StreamInfo              # immutable bag of hints (ext, mime, charset, …)
 ├─ DocumentConverter       # base class: accepts() + convert()
 │   ├─ MarkdownConverter
 │   ├─ CsvConverter
 │   ├─ DocxConverter (mammoth)
 │   └─ … one small class per format
 └─ DocumentConverterResult # { html, title, metadata }

When you call convert(), the engine:

Detects the stream — extension, mimetype, declared charset, and magic-byte sniffing via puremagic fill in a StreamInfo.
Dispatches — converters are tried in priority order; each accepts() is a cheap, non-destructive check. Specific formats win over the plain-text catch-all.
Converts — the winning converter returns a DocumentConverterResult. If a converter accepts but raises, the engine records it and tries the next one, so one greedy converter can't sink the whole conversion.

Writing a converter

from everythingtohtml import DocumentConverter, DocumentConverterResult, StreamInfo
from everythingtohtml._html_builder import wrap_document, escape_text

class UpperTextConverter(DocumentConverter):
    def accepts(self, file_stream, stream_info: StreamInfo, **kwargs) -> bool:
        return stream_info.normalized_extension() == ".loud"

    def convert(self, file_stream, stream_info: StreamInfo, **kwargs):
        text = file_stream.read().decode("utf-8").upper()
        return DocumentConverterResult(wrap_document(f"<pre>{escape_text(text)}</pre>"))

eth = EverythingToHtml()
eth.register_converter(UpperTextConverter())

Ship it as a package and expose it as a plugin via entry points so any user can EverythingToHtml(enable_plugins=True) and pick it up automatically — see docs/PLUGINS.md.

Contributing

Contributions are very welcome — new converters especially. See CONTRIBUTING.md and our Code of Conduct. Found a security issue? See SECURITY.md.

Acknowledgements

The converter-registry design is directly inspired by Microsoft's excellent markitdown. everythingtohtml aims to be its mirror image for teams that want structure-preserving HTML instead of Markdown.

License

MIT © everythingtohtml contributors

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