Hand it over. It gets signed. It's yours. Upload anything and get one proper document you fully control — no PDF headache, no DocuSign, no subscription. HTML is the sweet spot: open, simple, yours.
SHA-256 sealed · Ed25519 verifiable · nothing leaves your device
PDFs fight you. Word locks you in. HTML is the open, universal, signable middle: it opens on every device, weighs nothing, and you hold the whole file.
An algorithmic engine cleans any upload into real semantic HTML — headings, lists, tables, the Momentum document look. Not a screenshot of a page. A document.
Sign in your browser and download a single self-contained file with a SHA-256 integrity seal. No account, no service, no one between you and your document.
Conversion and signing run entirely in your browser. Your file is never uploaded. Complete control isn't a feature here — it's the architecture.
A document should outlive the app that made it, open on anything, and be something you can actually read and check yourself. That is HTML — not a web page, the document itself, in the open.
It's plain text. Open it in any editor and the whole document is right there — no binary blob, nothing hidden, nothing that needs one specific app to decode.
HTML is an open standard that belongs to no company. A .docx needs Microsoft, a PDF needs Adobe. HTML outlives any vendor — and any subscription.
Every device with a browser reads it. An HTML file from decades ago still opens perfectly today. That is what durable actually means.
Text, layout, structure, signature and integrity seal — all in a single self-contained file. You don't need the program that made it. The document stands on its own.
Because it's open, anyone can independently recompute the SHA-256 hash and verify the Ed25519 signature. You trust the math, not a logo.
Email, apps, and AI agents are all HTML underneath. Make the document HTML and it drops straight into the systems — and the agents — that already exist.
The web made HTML universal. The next step is everything else — documents, contracts, records — built on the same open foundation. One format you can read, own, and prove. That is the future Momentum Simplicity is built for.
Supports .docx, .md, .html, .txt, .csv, .xlsx, .ods, .odt, .rtf and .pptx — one file or many. It converts in front of you: no upload, no wait. You can also just paste text with Ctrl+V.
Converted locally in your browser.
Optional. Adds a signature + integrity seal.
A single .html file. Opens anywhere, forever.
unlocks when you signMomentum Velocity — our own model — reads the document and answers. This one sends the document's text to Momentum's AI (the read above stays on your device). Nothing is stored.
Drop a document on the left — it appears here, clean and signable.
Momentum converts it into clean, semantic HTML — the same document you'll download. Sign it if you like; the signature and a tamper-evident seal are baked right in.
Every AI module that needs to read, produce or sign a document can pull it through one clean engine. Same pipeline as this page — callable, deterministic, safe-by-default. Vibecoding gets documents for free.
The website and the agent API share the exact conversion + sanitize + seal pipeline. What you see here is the same thing an agent calls.
Untrusted documents become HTML with every script and handler stripped at the gate. Agents can convert hostile input without converting hostile behaviour.
Free for humans, metered for machines. The agent/API tier is the income line — wired through one choke point, verified by the Momentum License Service.
The whole app — convert, edit, sign, own — is free in your browser, forever. The paid line is the metered agent API: the same engine, called by your automations. No account, no lock-in; a license is a cryptographic token you hold.
Everything, in your browser. Your files never leave the device.
For people who want white-label exports and to back the project.
The /api/convert endpoint — every automation pulls documents through one clean, safe engine.
POST /api/convert → clean, sealed HTMLx-momentum-license — no forgeable keyPaste your Momentum license token to activate it on this device. It is verified locally, with cryptography — the token never leaves your browser.
curl -X POST https://momentum-simplicity.vercel.app/api/convert \
-H "content-type: application/json" \
-H "x-momentum-license: <your license token>" \
-d '{"filename":"contract.docx","contentBase64":"<base64 of the file>","sign":true}'Returns clean, sanitised HTML (plus a SHA-256 seal when sign:true). Untrusted input is stripped at the same fail-closed gate the browser uses — one engine, two doors. The endpoint is dark until switched on for launch.