Who publishes this site
Document Forge is published and operated by 김성진, based in Not disclosed. The operator is responsible for the editorial content, the hosting configuration, and the privacy practices described in the privacy notice.
Questions, corrections, takedown requests, and privacy requests all go to the same address: tttksj@gmail.com. Typical reply time is 5 business days.
Why the tools run in the browser
Most "convert this document" websites upload your file to a server you know nothing about. For the formats Document Forge supports, that upload is usually unnecessary. An HWPX file is a ZIP archive of XML parts, a Markdown or plain-text file is already text, and every modern browser ships a PDF viewer and a print-to-PDF pipeline. So the default path is: read the file in the page, show you what was actually extracted, and hand the result to your own browser's print dialog.
The practical consequence is that the default workflow has nothing to leak. There is no upload queue, no temporary bucket, and no "your file will be deleted in one hour" promise you have no way to verify.
What each tool does, precisely
Document preview and PDF saving
HWPX, TXT, Markdown, and HTML are parsed in the page. HTML is sanitised and shown in a sandboxed frame before it is printed, so a hostile document cannot run script against the site. Existing PDFs are handed to the browser's own viewer; Document Forge does not re-encode them. Legacy binary HWP is the one exception: it needs a licensed converter, so it is sent to an optional server adapter that is disabled by default and returns a clear error rather than pretending to have converted anything.
The AI writing signal
This is a stylometric reference score, not a detector. It combines sentence-length uniformity, vocabulary repetition, connector density, template phrasing, repeated sentence openings, punctuation rhythm, and paragraph-length variance into a single weighted number. Every one of those signals can be high in careful human writing and low in machine writing. We publish the reasoning in what an AI writing checker can actually tell you precisely so nobody uses the number as evidence about a person.
Character count
Characters with spaces, characters without spaces, words, paragraphs, and an estimated reading time, recalculated as you type. The counting rules and where they disagree with other tools are documented in the character count guide.
Editorial standard for the guides
The guides are written for this site rather than aggregated from elsewhere. Each one is expected to state the limits of the technique it describes, name the situations where the browser tool is the wrong choice, and avoid claiming an accuracy figure that has not been measured. When a guide describes behaviour of the tools on this site, that behaviour is checked against the running application before publication.
If you find something inaccurate or out of date, please report it; corrections are treated as higher priority than new pages.
How the site is funded
Document Forge is free, requires no account, and has no paid tier. Running costs are intended to be covered by advertising. Advertising is off until a visitor explicitly allows optional cookies in the privacy banner, and the ad code is not even downloaded before that choice. There is no sponsored placement inside the guides, and no guide recommends a product in exchange for payment. The privacy notice describes exactly which third parties are involved when advertising is enabled.
Accessibility and browser support
The interface targets keyboard operation, visible focus outlines, live regions for status changes, and a layout that reflows to a 375 px viewport. Sixteen interface languages are available from the header, and Arabic switches the layout to right-to-left. The tools need JavaScript, because the processing happens in the page; without it the site says so instead of failing silently.
Known limits
- Browser PDF saving is a print workflow. It preserves text reliably and layout approximately.
- Legacy
.hwpconversion is unavailable unless the deployment configures a converter. - The writing score is a reference signal and is never an authorship, plagiarism, or academic-integrity finding.
- Interface translations are complete for navigation and controls; some long-form status text falls back to English.