Claude Cowork is built to take a goal and come back with something finished — Anthropic describes the output as “polished work for your review”, saved to your account and your machine. What it deliberately doesn’t do is hand that work to someone outside. Anthropic’s own documentation is explicit: “Sessions can’t be shared with others”, and sharing live artifacts within an organisation is a Team and Enterprise capability. For anyone inside a company that’s fine — the work lands where colleagues already are. For a consultant, an agency, or a freelancer whose reader is a client, the last mile is still yours to solve, and it usually gets solved as an email attachment. Publishing it as a private page is the other option.
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Get the deliverable into a self-contained web page. Cowork’s documented outputs are things like spreadsheets, presentations, formatted documents, Markdown and CSV — so for a report or a deck, either ask for it as a single self-contained HTML file, or export from the application you opened it in. miinideck serves HTML and zipped bundles; it doesn’t render .xlsx or .pptx directly, so that export step is the one to plan for rather than discover.
Drop the file in and you get a link ending in 32 random characters, no-index by default. Your client clicks it and reads the work in their browser — no Claude account, no sign-in, no “this file may be unsafe” banner, and no 20 MB attachment sitting in their inbox where the version they reply about may not be the one you last sent.
From there the controls are the ones client work tends to need. Password-protect anything with commercial numbers in it, set an expiry so a proposal stops opening after its validity window, replace the file when Cowork produces a revised pass so the same link stays current, and switch on Review if you want their notes pinned to the paragraph they’re reacting to rather than paraphrased in an email.
Not as a session — Anthropic’s help documentation states plainly that sessions can’t be shared with others, and that sharing live artifacts within your organisation is available on Team and Enterprise plans. That’s a coherent design for a tool that works across your own files and accounts. It just means that when the reader is outside your organisation, the deliverable has to leave Cowork as a file, and the delivery step is a separate decision. Plans and features change, so check Anthropic’s documentation for the current state.
A self-contained HTML file is the one that travels best, because everything it needs is inside a single document — it opens identically on any machine with no application to install. Ask for the output that way where you can. If what you have is a deck or a document, export it to HTML first; miinideck hosts HTML and zipped bundles rather than rendering Office formats directly.
You can, and for a one-off it’s fine. It gets uncomfortable at the second revision: the client now holds two copies, replies about one of them without saying which, and you can’t tell whether the newest one was ever opened. A link removes the copies — there’s one address, it always serves the current version, and you can see whether it’s been read.
No. They click the link and the page opens. That’s the point of doing it this way rather than inviting them into a workspace: the person reviewing your work shouldn’t have to create credentials for a product they didn’t choose and won’t use again just to read what they’re paying you for.
Yes, and it’s the default. Every page is no-index and lives at an unguessable address, with no directory anywhere that lists pages. Add a password when the document carries pricing or strategy, and set an expiry so the engagement’s materials don’t stay open indefinitely after it ends.
No — replace the file and the address stays the same, so the link you already sent opens the latest pass. That suits an iterative tool particularly well: you can run another round, drop the new output in, and the client’s bookmark is simply correct without another email explaining which attachment supersedes which.
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