Turn HTML files into ODT in a couple of clicks. HTML is the markup language of the web; ODT is the open standard word-processing format. Content is preserved and the layout is rebuilt for the target format.
Drop your files here
HTML files (.html, .htm, .xhtml) · up to 100 MB each
or paste files from your clipboard
Ready when you are
Drop a HTML file above and FileTools360 will turn it into ODT — right here on your device, without uploading anything.
Drag them onto the drop area, choose them from your device, or paste them from your clipboard. You can queue several at once. Nothing is sent anywhere — the file stays on this device.
There is nothing to configure — the layout is rebuilt for ODT automatically. That rebuild is where the differences show up, so check headings, tables and page breaks in the result.
Press Convert. Everything happens on your own device — nothing is uploaded. Download files one by one, or grab them all as a ZIP.
Privacy, in plain words
What “uploaded” normally means. On most online converters, pressing the button copies your file across the internet onto a computer owned by that website. That copy is what the word “upload” means, and it is the part nobody explains.
What happens instead. This site does not do it. There is no server here that receives files, so your HTML file is read, converted and handed back by the browser you are using right now. It never travels — so there is no copy to store, read, leak or hand over.
Check it yourself in ten seconds
Turn off your Wi-Fi after this page has loaded, then convert a file anyway. It still works, because everything needed is already on your device.
The longer explanation of how this works, and the full detail of what is and is not stored on the privacy page.
A Word file is usually a draft — which means it carries the things that were not meant to be final, and often tracked changes and comments nobody removed. It matters more than it sounds, because of what documents usually are:
Medical and clinical reports
patient information that is regulated in most countries
Unpublished manuscripts
work whose value depends on it not circulating
Employment contracts
salary, notice periods, restraint clauses
A CV or résumé
home address, phone number, date of birth, full work history
A file that is never sent cannot be kept, leaked, subpoenaed or used to train anything. That is a property of how this works, not a promise about how carefully it is run.
HTML is the markup language of the web, describing document structure — headings, paragraphs, lists, links — which browsers then render.
ODT is the OpenDocument text format, an ISO standard that works much like DOCX — a ZIP of XML — but developed openly rather than by a single vendor.
The two formats solve different problems, which is why converting between them involves trade-offs rather than a straight upgrade.
| Property | Source | Target |
|---|---|---|
| Compression | None | Lossless |
| Introduced | 1993 | 2005 |
| Browser support | Every browser. | LibreOffice natively, Word with some fidelity loss. |
People make this switch when they run into the limits of HTML: you need a self-contained, fixed-layout file to send someone. ODT is the better fit when working in LibreOffice or under an open-standards requirement.
The content survives; the layout is rebuilt. Text and the order it is read in carry across, but ODT lays the page out again rather than reproducing HTML's exact positioning, so line breaks, page breaks and spacing will differ. Anything that depends on precise placement is worth checking in the result.
It depends entirely on the content: across the samples the ODT ranged from 3.6× smaller to 3.4× larger, with a middle case 1.9× larger.
| Sample | HTML in | ODT out | Change |
|---|---|---|---|
| An easy clipThe compressible end of the range — a clean tone, or a moving test pattern — where a codec does its best work. | 560 B | 1.9 KB | 3.4× |
| A hard clipThe other end — pink noise, or dense video grain. Close to incompressible by design, and the worst case for every codec. | 6.9 KB | 1.9 KB | −72% |
Produced by this site's own converter. The same code that runs in your browser, at the same default settings, so these are the bytes you would download.
Samples are generated from a fixed seed rather than taken from real photographs or documents, so the corpus is reproducible and carries no licensing question — and so the numbers predict the shape of your result rather than its exact size. Measured 2026-10-01. The method, and the command that regenerates every figure on this page, are on the how it works page.
Source
The markup language of the web.
Target
The open standard word-processing format.
The result is fully editable. Styling is rebuilt from semantic structure rather than copied verbatim.
Good to know
Runs entirely in your browser
527 converters and tools65 file formatsnothing ever uploaded.